Merge #191

191: dumps v2 r=irevoire a=MarinPostma



Co-authored-by: Marin Postma <postma.marin@protonmail.com>
Co-authored-by: marin <postma.marin@protonmail.com>

meilisearch-http/build.rs

@@ -50,7 +50,7 @@ mod mini_dashboard {
             sha1_file.read_to_string(&mut sha1)?;
             if sha1 == meta["sha1"].as_str().unwrap() {
                 // Nothing to do.
-                return Ok(())
+                return Ok(());
             }
         }
 
@@ -62,7 +62,11 @@ mod mini_dashboard {
         hasher.update(&dashboard_assets_bytes);
         let sha1 = hex::encode(hasher.finalize());
 
-        assert_eq!(meta["sha1"].as_str().unwrap(), sha1, "Downloaded mini-dashboard shasum differs from the one specified in the Cargo.toml");
+        assert_eq!(
+            meta["sha1"].as_str().unwrap(),
+            sha1,
+            "Downloaded mini-dashboard shasum differs from the one specified in the Cargo.toml"
+        );
 
         create_dir_all(&dashboard_dir)?;
         let cursor = Cursor::new(&dashboard_assets_bytes);

meilisearch-http/src/data/mod.rs

@@ -4,7 +4,9 @@ use std::sync::Arc;
 use sha2::Digest;
 
 use crate::index::{Checked, Settings};
-use crate::index_controller::{IndexController, IndexStats, Stats, DumpInfo, IndexMetadata, IndexSettings};
+use crate::index_controller::{
+    DumpInfo, IndexController, IndexMetadata, IndexSettings, IndexStats, Stats,
+};
 use crate::option::Opt;
 
 pub mod search;
@@ -67,7 +69,11 @@ impl Data {
 
         api_keys.generate_missing_api_keys();
 
-        let inner = DataInner { index_controller, api_keys, options };
+        let inner = DataInner {
+            index_controller,
+            api_keys,
+            options,
+        };
         let inner = Arc::new(inner);
 
         Ok(Data { inner })

meilisearch-http/src/error.rs

@@ -299,7 +299,7 @@ impl From<JsonPayloadError> for Error {
             JsonPayloadError::Payload(err) => {
                 Error::BadRequest(format!("Problem while decoding the request: {}", err))
             }
-            e => Error::Internal(format!("Unexpected Json error: {}", e))
+            e => Error::Internal(format!("Unexpected Json error: {}", e)),
         }
     }
 }
@@ -310,7 +310,7 @@ impl From<QueryPayloadError> for Error {
             QueryPayloadError::Deserialize(err) => {
                 Error::BadRequest(format!("Invalid query parameters: {}", err))
             }
-            e => Error::Internal(format!("Unexpected query payload error: {}", e))
+            e => Error::Internal(format!("Unexpected query payload error: {}", e)),
         }
     }
 }

meilisearch-http/src/helpers/authentication.rs

@@ -1,16 +1,16 @@
 use std::pin::Pin;
 use std::task::{Context, Poll};
 
+use actix_web::body::Body;
 use actix_web::dev::{Service, ServiceRequest, ServiceResponse, Transform};
 use actix_web::web;
-use actix_web::body::Body;
-use futures::ready;
-use futures::future::{ok, Future, Ready};
 use actix_web::ResponseError as _;
+use futures::future::{ok, Future, Ready};
+use futures::ready;
 use pin_project::pin_project;
 
-use crate::Data;
 use crate::error::{Error, ResponseError};
+use crate::Data;
 
 #[derive(Clone, Copy)]
 pub enum Authentication {
@@ -59,19 +59,15 @@ where
         let data = req.app_data::<web::Data<Data>>().unwrap();
 
         if data.api_keys().master.is_none() {
-            return AuthenticationFuture::Authenticated(self.service.call(req))
+            return AuthenticationFuture::Authenticated(self.service.call(req));
         }
 
         let auth_header = match req.headers().get("X-Meili-API-Key") {
             Some(auth) => match auth.to_str() {
                 Ok(auth) => auth,
-                Err(_) => {
+                Err(_) => return AuthenticationFuture::NoHeader(Some(req)),
-                    return AuthenticationFuture::NoHeader(Some(req))
-                }
             },
-            None => {
+            None => return AuthenticationFuture::NoHeader(Some(req)),
-                return AuthenticationFuture::NoHeader(Some(req))
-            }
         };
 
         let authenticated = match self.acl {
@@ -114,12 +110,10 @@ where
     fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let this = self.project();
         match this {
-            AuthProj::Authenticated(fut) => {
+            AuthProj::Authenticated(fut) => match ready!(fut.poll(cx)) {
-                match ready!(fut.poll(cx)) {
                 Ok(resp) => Poll::Ready(Ok(resp)),
                 Err(e) => Poll::Ready(Err(e)),
-                }
+            },
-            }
             AuthProj::NoHeader(req) => {
                 match req.take() {
                     Some(req) => {
@@ -135,7 +129,8 @@ where
             AuthProj::Refused(req) => {
                 match req.take() {
                     Some(req) => {
-                        let bad_token = req.headers()
+                        let bad_token = req
+                            .headers()
                             .get("X-Meili-API-Key")
                             .map(|h| h.to_str().map(String::from).unwrap_or_default())
                             .unwrap_or_default();

meilisearch-http/src/index/dump.rs

@@ -0,0 +1,132 @@
+use std::fs::{create_dir_all, File};
+use std::io::{BufRead, BufReader, Write};
+use std::path::Path;
+use std::sync::Arc;
+
+use anyhow::{bail, Context};
+use heed::RoTxn;
+use indexmap::IndexMap;
+use milli::update::{IndexDocumentsMethod, UpdateFormat::JsonStream};
+use serde::{Deserialize, Serialize};
+
+use crate::option::IndexerOpts;
+
+use super::{update_handler::UpdateHandler, Index, Settings, Unchecked};
+
+#[derive(Serialize, Deserialize)]
+struct DumpMeta {
+    settings: Settings<Unchecked>,
+    primary_key: Option<String>,
+}
+
+const META_FILE_NAME: &str = "meta.json";
+const DATA_FILE_NAME: &str = "documents.jsonl";
+
+impl Index {
+    pub fn dump(&self, path: impl AsRef<Path>) -> anyhow::Result<()> {
+        // acquire write txn make sure any ongoing write is finished before we start.
+        let txn = self.env.write_txn()?;
+
+        self.dump_documents(&txn, &path)?;
+        self.dump_meta(&txn, &path)?;
+
+        Ok(())
+    }
+
+    fn dump_documents(&self, txn: &RoTxn, path: impl AsRef<Path>) -> anyhow::Result<()> {
+        let document_file_path = path.as_ref().join(DATA_FILE_NAME);
+        let mut document_file = File::create(&document_file_path)?;
+
+        let documents = self.all_documents(txn)?;
+        let fields_ids_map = self.fields_ids_map(txn)?;
+
+        // dump documents
+        let mut json_map = IndexMap::new();
+        for document in documents {
+            let (_, reader) = document?;
+
+            for (fid, bytes) in reader.iter() {
+                if let Some(name) = fields_ids_map.name(fid) {
+                    json_map.insert(name, serde_json::from_slice::<serde_json::Value>(bytes)?);
+                }
+            }
+
+            serde_json::to_writer(&mut document_file, &json_map)?;
+            document_file.write_all(b"\n")?;
+
+            json_map.clear();
+        }
+
+        Ok(())
+    }
+
+    fn dump_meta(&self, txn: &RoTxn, path: impl AsRef<Path>) -> anyhow::Result<()> {
+        let meta_file_path = path.as_ref().join(META_FILE_NAME);
+        let mut meta_file = File::create(&meta_file_path)?;
+
+        let settings = self.settings_txn(txn)?.into_unchecked();
+        let primary_key = self.primary_key(txn)?.map(String::from);
+        let meta = DumpMeta {
+            settings,
+            primary_key,
+        };
+
+        serde_json::to_writer(&mut meta_file, &meta)?;
+
+        Ok(())
+    }
+
+    pub fn load_dump(
+        src: impl AsRef<Path>,
+        dst: impl AsRef<Path>,
+        size: usize,
+        indexing_options: &IndexerOpts,
+    ) -> anyhow::Result<()> {
+        let dir_name = src
+            .as_ref()
+            .file_name()
+            .with_context(|| format!("invalid dump index: {}", src.as_ref().display()))?;
+        let dst_dir_path = dst.as_ref().join("indexes").join(dir_name);
+        create_dir_all(&dst_dir_path)?;
+
+        let meta_path = src.as_ref().join(META_FILE_NAME);
+        let mut meta_file = File::open(meta_path)?;
+        let DumpMeta {
+            settings,
+            primary_key,
+        } = serde_json::from_reader(&mut meta_file)?;
+        let settings = settings.check();
+        let index = Self::open(&dst_dir_path, size)?;
+        let mut txn = index.write_txn()?;
+
+        let handler = UpdateHandler::new(&indexing_options)?;
+
+        index.update_settings_txn(&mut txn, &settings, handler.update_builder(0))?;
+
+        let document_file_path = src.as_ref().join(DATA_FILE_NAME);
+        let reader = File::open(&document_file_path)?;
+        let mut reader = BufReader::new(reader);
+        reader.fill_buf()?;
+        // If the document file is empty, we don't perform the document addition, to prevent
+        // a primary key error to be thrown.
+        if !reader.buffer().is_empty() {
+            index.update_documents_txn(
+                &mut txn,
+                JsonStream,
+                IndexDocumentsMethod::UpdateDocuments,
+                Some(reader),
+                handler.update_builder(0),
+                primary_key.as_deref(),
+            )?;
+        }
+
+        txn.commit()?;
+
+        match Arc::try_unwrap(index.0) {
+            Ok(inner) => inner.prepare_for_closing().wait(),
+            Err(_) => bail!("Could not close index properly."),
+        }
+
+        Ok(())
+    }
+}

meilisearch-http/src/index/mod.rs

@@ -1,17 +1,23 @@
-use std::{collections::{BTreeSet, HashSet}, marker::PhantomData};
+use std::collections::{BTreeSet, HashSet};
+use std::fs::create_dir_all;
+use std::marker::PhantomData;
 use std::ops::Deref;
+use std::path::Path;
 use std::sync::Arc;
 
 use anyhow::{bail, Context};
+use heed::{EnvOpenOptions, RoTxn};
 use milli::obkv_to_json;
 use serde_json::{Map, Value};
 
 use crate::helpers::EnvSizer;
 pub use search::{SearchQuery, SearchResult, DEFAULT_SEARCH_LIMIT};
-pub use updates::{Facets, Settings, Checked, Unchecked};
 use serde::{de::Deserializer, Deserialize};
+pub use updates::{Checked, Facets, Settings, Unchecked};
 
+mod dump;
 mod search;
+pub mod update_handler;
 mod updates;
 
 pub type Document = Map<String, Value>;
@@ -36,9 +42,20 @@ where
 }
 
 impl Index {
+    pub fn open(path: impl AsRef<Path>, size: usize) -> anyhow::Result<Self> {
+        create_dir_all(&path)?;
+        let mut options = EnvOpenOptions::new();
+        options.map_size(size);
+        let index = milli::Index::new(options, &path)?;
+        Ok(Index(Arc::new(index)))
+    }
+
     pub fn settings(&self) -> anyhow::Result<Settings<Checked>> {
         let txn = self.read_txn()?;
+        self.settings_txn(&txn)
+    }
 
+    pub fn settings_txn(&self, txn: &RoTxn) -> anyhow::Result<Settings<Checked>> {
         let displayed_attributes = self
             .displayed_fields(&txn)?
             .map(|fields| fields.into_iter().map(String::from).collect());
@@ -95,8 +112,6 @@ impl Index {
 
         let mut documents = Vec::new();
 
-        println!("fields to display: {:?}", fields_to_display);
-
         for entry in iter {
             let (_id, obkv) = entry?;
             let object = obkv_to_json(&fields_to_display, &fields_ids_map, obkv)?;

meilisearch-http/src/index/search.rs

@@ -90,7 +90,8 @@ impl Index {
         let mut documents = Vec::new();
         let fields_ids_map = self.fields_ids_map(&rtxn).unwrap();
 
-        let displayed_ids = self.displayed_fields_ids(&rtxn)?
+        let displayed_ids = self
+            .displayed_fields_ids(&rtxn)?
             .map(|fields| fields.into_iter().collect::<HashSet<_>>())
             .unwrap_or_else(|| fields_ids_map.iter().map(|(id, _)| id).collect());
 
@@ -156,10 +157,8 @@ impl Index {
         };
 
         let stop_words = fst::Set::default();
-        let highlighter = Highlighter::new(
+        let highlighter =
-            &stop_words,
+            Highlighter::new(&stop_words, (String::from("<em>"), String::from("</em>")));
-            (String::from("<em>"), String::from("</em>")),
-        );
 
         for (_id, obkv) in self.documents(&rtxn, documents_ids)? {
             let document = make_document(&all_attributes, &fields_ids_map, obkv)?;
@@ -384,17 +383,16 @@ mod test {
     #[test]
     fn no_formatted() {
         let stop_words = fst::Set::default();
-        let highlighter = Highlighter::new(
+        let highlighter =
-            &stop_words,
+            Highlighter::new(&stop_words, (String::from("<em>"), String::from("</em>")));
-            (String::from("<em>"), String::from("</em>")),
-        );
 
         let mut fields = FieldsIdsMap::new();
         let id = fields.insert("test").unwrap();
 
         let mut buf = Vec::new();
         let mut obkv = obkv::KvWriter::new(&mut buf);
-        obkv.insert(id, Value::String("hello".into()).to_string().as_bytes()).unwrap();
+        obkv.insert(id, Value::String("hello".into()).to_string().as_bytes())
+            .unwrap();
         obkv.finish().unwrap();
 
         let obkv = obkv::KvReader::new(&buf);
@@ -410,8 +408,9 @@ mod test {
             &highlighter,
             &matching_words,
             &all_formatted,
-            &to_highlight_ids
+            &to_highlight_ids,
-        ).unwrap();
+        )
+        .unwrap();
 
         assert!(value.is_empty());
     }
@@ -419,17 +418,16 @@ mod test {
     #[test]
     fn formatted_no_highlight() {
         let stop_words = fst::Set::default();
-        let highlighter = Highlighter::new(
+        let highlighter =
-            &stop_words,
+            Highlighter::new(&stop_words, (String::from("<em>"), String::from("</em>")));
-            (String::from("<em>"), String::from("</em>")),
-        );
 
         let mut fields = FieldsIdsMap::new();
         let id = fields.insert("test").unwrap();
 
         let mut buf = Vec::new();
         let mut obkv = obkv::KvWriter::new(&mut buf);
-        obkv.insert(id, Value::String("hello".into()).to_string().as_bytes()).unwrap();
+        obkv.insert(id, Value::String("hello".into()).to_string().as_bytes())
+            .unwrap();
         obkv.finish().unwrap();
 
         let obkv = obkv::KvReader::new(&buf);
@@ -445,8 +443,9 @@ mod test {
             &highlighter,
             &matching_words,
             &all_formatted,
-            &to_highlight_ids
+            &to_highlight_ids,
-        ).unwrap();
+        )
+        .unwrap();
 
         assert_eq!(value["test"], "hello");
     }
@@ -454,17 +453,16 @@ mod test {
     #[test]
     fn formatted_with_highlight() {
         let stop_words = fst::Set::default();
-        let highlighter = Highlighter::new(
+        let highlighter =
-            &stop_words,
+            Highlighter::new(&stop_words, (String::from("<em>"), String::from("</em>")));
-            (String::from("<em>"), String::from("</em>")),
-        );
 
         let mut fields = FieldsIdsMap::new();
         let id = fields.insert("test").unwrap();
 
         let mut buf = Vec::new();
         let mut obkv = obkv::KvWriter::new(&mut buf);
-        obkv.insert(id, Value::String("hello".into()).to_string().as_bytes()).unwrap();
+        obkv.insert(id, Value::String("hello".into()).to_string().as_bytes())
+            .unwrap();
         obkv.finish().unwrap();
 
         let obkv = obkv::KvReader::new(&buf);
@@ -480,8 +478,9 @@ mod test {
             &highlighter,
             &matching_words,
             &all_formatted,
-            &to_highlight_ids
+            &to_highlight_ids,
-        ).unwrap();
+        )
+        .unwrap();
 
         assert_eq!(value["test"], "<em>hello</em>");
     }

meilisearch-http/src/index/update_handler.rs

@@ -38,7 +38,7 @@ impl UpdateHandler {
         })
     }
 
-    fn update_builder(&self, update_id: u64) -> UpdateBuilder {
+    pub fn update_builder(&self, update_id: u64) -> UpdateBuilder {
         // We prepare the update by using the update builder.
         let mut update_builder = UpdateBuilder::new(update_id);
         if let Some(max_nb_chunks) = self.max_nb_chunks {

meilisearch-http/src/index/updates.rs

@@ -87,6 +87,28 @@ impl Settings<Checked> {
             _kind: PhantomData,
         }
     }
+
+    pub fn into_unchecked(self) -> Settings<Unchecked> {
+        let Self {
+            displayed_attributes,
+            searchable_attributes,
+            attributes_for_faceting,
+            ranking_rules,
+            stop_words,
+            distinct_attribute,
+            ..
+        } = self;
+
+        Settings {
+            displayed_attributes,
+            searchable_attributes,
+            attributes_for_faceting,
+            ranking_rules,
+            stop_words,
+            distinct_attribute,
+            _kind: PhantomData,
+        }
+    }
 }
 
 impl Settings<Unchecked> {

meilisearch-http/src/index_controller/dump_actor/actor.rs

@@ -1,27 +1,29 @@
-use super::{DumpError, DumpInfo, DumpMsg, DumpResult, DumpStatus};
+use std::collections::HashMap;
-use crate::helpers::compression;
+use std::path::{Path, PathBuf};
-use crate::index_controller::{index_actor, update_actor, uuid_resolver, IndexMetadata};
+use std::sync::Arc;
+
 use async_stream::stream;
 use chrono::Utc;
-use futures::stream::StreamExt;
+use futures::{lock::Mutex, stream::StreamExt};
 use log::{error, info};
-use std::{
-    collections::HashSet,
-    path::{Path, PathBuf},
-    sync::Arc,
-};
 use tokio::sync::{mpsc, oneshot, RwLock};
-use uuid::Uuid;
+use update_actor::UpdateActorHandle;
+use uuid_resolver::UuidResolverHandle;
+
+use super::{DumpError, DumpInfo, DumpMsg, DumpResult, DumpStatus, DumpTask};
+use crate::index_controller::{update_actor, uuid_resolver};
 
 pub const CONCURRENT_DUMP_MSG: usize = 10;
 
-pub struct DumpActor<UuidResolver, Index, Update> {
+pub struct DumpActor<UuidResolver, Update> {
     inbox: Option<mpsc::Receiver<DumpMsg>>,
     uuid_resolver: UuidResolver,
-    index: Index,
     update: Update,
     dump_path: PathBuf,
-    dump_info: Arc<RwLock<Option<DumpInfo>>>,
+    lock: Arc<Mutex<()>>,
+    dump_infos: Arc<RwLock<HashMap<String, DumpInfo>>>,
+    update_db_size: usize,
+    index_db_size: usize,
 }
 
 /// Generate uid from creation date
@@ -29,26 +31,30 @@ fn generate_uid() -> String {
     Utc::now().format("%Y%m%d-%H%M%S%3f").to_string()
 }
 
-impl<UuidResolver, Index, Update> DumpActor<UuidResolver, Index, Update>
+impl<UuidResolver, Update> DumpActor<UuidResolver, Update>
 where
-    UuidResolver: uuid_resolver::UuidResolverHandle + Send + Sync + Clone + 'static,
+    UuidResolver: UuidResolverHandle + Send + Sync + Clone + 'static,
-    Index: index_actor::IndexActorHandle + Send + Sync + Clone + 'static,
+    Update: UpdateActorHandle + Send + Sync + Clone + 'static,
-    Update: update_actor::UpdateActorHandle + Send + Sync + Clone + 'static,
 {
     pub fn new(
         inbox: mpsc::Receiver<DumpMsg>,
         uuid_resolver: UuidResolver,
-        index: Index,
         update: Update,
         dump_path: impl AsRef<Path>,
+        index_db_size: usize,
+        update_db_size: usize,
     ) -> Self {
+        let dump_infos = Arc::new(RwLock::new(HashMap::new()));
+        let lock = Arc::new(Mutex::new(()));
         Self {
             inbox: Some(inbox),
             uuid_resolver,
-            index,
             update,
             dump_path: dump_path.as_ref().into(),
-            dump_info: Arc::new(RwLock::new(None)),
+            dump_infos,
+            lock,
+            index_db_size,
+            update_db_size,
         }
     }
 
@@ -90,149 +96,61 @@ where
     }
 
     async fn handle_create_dump(&self, ret: oneshot::Sender<DumpResult<DumpInfo>>) {
-        if self.is_running().await {
+        let uid = generate_uid();
+        let info = DumpInfo::new(uid.clone(), DumpStatus::InProgress);
+
+        let _lock = match self.lock.try_lock() {
+            Some(lock) => lock,
+            None => {
                 ret.send(Err(DumpError::DumpAlreadyRunning))
                     .expect("Dump actor is dead");
                 return;
             }
-        let uid = generate_uid();
+        };
-        let info = DumpInfo::new(uid.clone(), DumpStatus::InProgress);
+
-        *self.dump_info.write().await = Some(info.clone());
+        self.dump_infos
+            .write()
+            .await
+            .insert(uid.clone(), info.clone());
 
         ret.send(Ok(info)).expect("Dump actor is dead");
 
-        let dump_info = self.dump_info.clone();
+        let task = DumpTask {
+            path: self.dump_path.clone(),
+            uuid_resolver: self.uuid_resolver.clone(),
+            update_handle: self.update.clone(),
+            uid: uid.clone(),
+            update_db_size: self.update_db_size,
+            index_db_size: self.index_db_size,
+        };
 
-        let task_result = tokio::task::spawn(perform_dump(
+        let task_result = tokio::task::spawn(task.run()).await;
-            self.dump_path.clone(),
+
-            self.uuid_resolver.clone(),
+        let mut dump_infos = self.dump_infos.write().await;
-            self.index.clone(),
+        let dump_infos = dump_infos
-            self.update.clone(),
+            .get_mut(&uid)
-            uid.clone(),
+            .expect("dump entry deleted while lock was acquired");
-        ))
-        .await;
 
         match task_result {
             Ok(Ok(())) => {
-                (*dump_info.write().await).as_mut().expect("Inconsistent dump service state").done();
+                dump_infos.done();
                 info!("Dump succeed");
             }
             Ok(Err(e)) => {
-                (*dump_info.write().await).as_mut().expect("Inconsistent dump service state").with_error(e.to_string());
+                dump_infos.with_error(e.to_string());
                 error!("Dump failed: {}", e);
             }
             Err(_) => {
+                dump_infos.with_error("Unexpected error while performing dump.".to_string());
                 error!("Dump panicked. Dump status set to failed");
-                *dump_info.write().await = Some(DumpInfo::new(uid, DumpStatus::Failed));
             }
         };
     }
 
     async fn handle_dump_info(&self, uid: String) -> DumpResult<DumpInfo> {
-        match &*self.dump_info.read().await {
+        match self.dump_infos.read().await.get(&uid) {
-            None => self.dump_from_fs(uid).await,
-            Some(DumpInfo { uid: ref s, .. }) if &uid != s => self.dump_from_fs(uid).await,
             Some(info) => Ok(info.clone()),
+            _ => Err(DumpError::DumpDoesNotExist(uid)),
         }
     }
-
-    async fn dump_from_fs(&self, uid: String) -> DumpResult<DumpInfo> {
-        self.dump_path
-            .join(format!("{}.dump", &uid))
-            .exists()
-            .then(|| DumpInfo::new(uid.clone(), DumpStatus::Done))
-            .ok_or(DumpError::DumpDoesNotExist(uid))
-    }
-
-    async fn is_running(&self) -> bool {
-        matches!(
-            *self.dump_info.read().await,
-            Some(DumpInfo {
-                status: DumpStatus::InProgress,
-                ..
-            })
-        )
-    }
-}
-
-async fn perform_dump<UuidResolver, Index, Update>(
-    dump_path: PathBuf,
-    uuid_resolver: UuidResolver,
-    index: Index,
-    update: Update,
-    uid: String,
-) -> anyhow::Result<()>
-where
-    UuidResolver: uuid_resolver::UuidResolverHandle + Send + Sync + Clone + 'static,
-    Index: index_actor::IndexActorHandle + Send + Sync + Clone + 'static,
-    Update: update_actor::UpdateActorHandle + Send + Sync + Clone + 'static,
-{
-    info!("Performing dump.");
-
-    let dump_dir = dump_path.clone();
-    tokio::fs::create_dir_all(&dump_dir).await?;
-    let temp_dump_dir =
-        tokio::task::spawn_blocking(move || tempfile::tempdir_in(dump_dir)).await??;
-    let temp_dump_path = temp_dump_dir.path().to_owned();
-
-    let uuids = uuid_resolver.list().await?;
-    // maybe we could just keep the vec as-is
-    let uuids: HashSet<(String, Uuid)> = uuids.into_iter().collect();
-
-    if uuids.is_empty() {
-        return Ok(());
-    }
-
-    let indexes = list_indexes(&uuid_resolver, &index).await?;
-
-    // we create one directory by index
-    for meta in indexes.iter() {
-        tokio::fs::create_dir(temp_dump_path.join(&meta.uid)).await?;
-    }
-
-    let metadata = super::Metadata::new(indexes, env!("CARGO_PKG_VERSION").to_string());
-    metadata.to_path(&temp_dump_path).await?;
-
-    update.dump(uuids, temp_dump_path.clone()).await?;
-
-    let dump_dir = dump_path.clone();
-    let dump_path = dump_path.join(format!("{}.dump", uid));
-    let dump_path = tokio::task::spawn_blocking(move || -> anyhow::Result<PathBuf> {
-        let temp_dump_file = tempfile::NamedTempFile::new_in(dump_dir)?;
-        let temp_dump_file_path = temp_dump_file.path().to_owned();
-        compression::to_tar_gz(temp_dump_path, temp_dump_file_path)?;
-        temp_dump_file.persist(&dump_path)?;
-        Ok(dump_path)
-    })
-    .await??;
-
-    info!("Created dump in {:?}.", dump_path);
-
-    Ok(())
-}
-
-async fn list_indexes<UuidResolver, Index>(
-    uuid_resolver: &UuidResolver,
-    index: &Index,
-) -> anyhow::Result<Vec<IndexMetadata>>
-where
-    UuidResolver: uuid_resolver::UuidResolverHandle,
-    Index: index_actor::IndexActorHandle,
-{
-    let uuids = uuid_resolver.list().await?;
-
-    let mut ret = Vec::new();
-
-    for (uid, uuid) in uuids {
-        let meta = index.get_index_meta(uuid).await?;
-        let meta = IndexMetadata {
-            uuid,
-            name: uid.clone(),
-            uid,
-            meta,
-        };
-        ret.push(meta);
-    }
-
-    Ok(ret)
 }

meilisearch-http/src/index_controller/dump_actor/handle_impl.rs

@@ -1,6 +1,8 @@
-use std::path::{Path};
+use std::path::Path;
+
 use actix_web::web::Bytes;
 use tokio::sync::{mpsc, oneshot};
+
 use super::{DumpActor, DumpActorHandle, DumpInfo, DumpMsg, DumpResult};
 
 #[derive(Clone)]
@@ -29,13 +31,22 @@ impl DumpActorHandleImpl {
     pub fn new(
         path: impl AsRef<Path>,
         uuid_resolver: crate::index_controller::uuid_resolver::UuidResolverHandleImpl,
-        index: crate::index_controller::index_actor::IndexActorHandleImpl,
         update: crate::index_controller::update_actor::UpdateActorHandleImpl<Bytes>,
+        index_db_size: usize,
+        update_db_size: usize,
     ) -> anyhow::Result<Self> {
         let (sender, receiver) = mpsc::channel(10);
-        let actor = DumpActor::new(receiver, uuid_resolver, index, update, path);
+        let actor = DumpActor::new(
+            receiver,
+            uuid_resolver,
+            update,
+            path,
+            index_db_size,
+            update_db_size,
+        );
 
         tokio::task::spawn(actor.run());
+
         Ok(Self { sender })
     }
 }

meilisearch-http/src/index_controller/dump_actor/loaders/mod.rs

@@ -0,0 +1,2 @@
+pub mod v1;
+pub mod v2;

meilisearch-http/src/index_controller/dump_actor/loaders/v1.rs

@@ -1,12 +1,62 @@
-use std::{collections::{BTreeMap, BTreeSet}, marker::PhantomData};
+use std::collections::{BTreeMap, BTreeSet};
+use std::fs::{create_dir_all, File};
+use std::io::BufRead;
+use std::marker::PhantomData;
+use std::path::Path;
+use std::sync::Arc;
 
-use log::warn;
+use heed::EnvOpenOptions;
+use log::{error, info, warn};
+use milli::update::{IndexDocumentsMethod, UpdateFormat};
 use serde::{Deserialize, Serialize};
-use crate::{index::Unchecked, index_controller};
+use uuid::Uuid;
-use crate::index::deserialize_some;
-use super::*;
 
-/// This is the settings used in the last version of meilisearch exporting dump in V1
+use crate::index_controller::{self, uuid_resolver::HeedUuidStore, IndexMetadata};
+use crate::{
+    index::{deserialize_some, update_handler::UpdateHandler, Index, Unchecked},
+    option::IndexerOpts,
+};
+
+#[derive(Serialize, Deserialize, Debug)]
+#[serde(rename_all = "camelCase")]
+pub struct MetadataV1 {
+    db_version: String,
+    indexes: Vec<IndexMetadata>,
+}
+
+impl MetadataV1 {
+    pub fn load_dump(
+        self,
+        src: impl AsRef<Path>,
+        dst: impl AsRef<Path>,
+        size: usize,
+        indexer_options: &IndexerOpts,
+    ) -> anyhow::Result<()> {
+        info!(
+            "Loading dump, dump database version: {}, dump version: V1",
+            self.db_version
+        );
+
+        let uuid_store = HeedUuidStore::new(&dst)?;
+        for index in self.indexes {
+            let uuid = Uuid::new_v4();
+            uuid_store.insert(index.uid.clone(), uuid)?;
+            let src = src.as_ref().join(index.uid);
+            load_index(
+                &src,
+                &dst,
+                uuid,
+                index.meta.primary_key.as_deref(),
+                size,
+                indexer_options,
+            )?;
+        }
+
+        Ok(())
+    }
+}
+
+// These are the settings used in legacy meilisearch (<v0.21.0).
 #[derive(Default, Clone, Serialize, Deserialize, Debug)]
 #[serde(rename_all = "camelCase", deny_unknown_fields)]
 struct Settings {
@@ -26,6 +76,60 @@ struct Settings {
     pub attributes_for_faceting: Option<Option<Vec<String>>>,
 }
 
+fn load_index(
+    src: impl AsRef<Path>,
+    dst: impl AsRef<Path>,
+    uuid: Uuid,
+    primary_key: Option<&str>,
+    size: usize,
+    indexer_options: &IndexerOpts,
+) -> anyhow::Result<()> {
+    let index_path = dst.as_ref().join(&format!("indexes/index-{}", uuid));
+
+    create_dir_all(&index_path)?;
+    let mut options = EnvOpenOptions::new();
+    options.map_size(size);
+    let index = milli::Index::new(options, index_path)?;
+    let index = Index(Arc::new(index));
+
+    // extract `settings.json` file and import content
+    let settings = import_settings(&src)?;
+    let settings: index_controller::Settings<Unchecked> = settings.into();
+
+    let mut txn = index.write_txn()?;
+
+    let handler = UpdateHandler::new(&indexer_options)?;
+
+    index.update_settings_txn(&mut txn, &settings.check(), handler.update_builder(0))?;
+
+    let file = File::open(&src.as_ref().join("documents.jsonl"))?;
+    let mut reader = std::io::BufReader::new(file);
+    reader.fill_buf()?;
+    if !reader.buffer().is_empty() {
+        index.update_documents_txn(
+            &mut txn,
+            UpdateFormat::JsonStream,
+            IndexDocumentsMethod::ReplaceDocuments,
+            Some(reader),
+            handler.update_builder(0),
+            primary_key,
+        )?;
+    }
+
+    txn.commit()?;
+
+    // Finaly, we extract the original milli::Index and close it
+    Arc::try_unwrap(index.0)
+        .map_err(|_e| "Couldn't close the index properly")
+        .unwrap()
+        .prepare_for_closing()
+        .wait();
+
+    // Updates are ignored in dumps V1.
+
+    Ok(())
+}
+
 /// we need to **always** be able to convert the old settings to the settings currently being used
 impl From<Settings> for index_controller::Settings<Unchecked> {
     fn from(settings: Settings) -> Self {
@@ -69,54 +173,11 @@ impl From<Settings> for index_controller::Settings<Unchecked> {
 }
 
 /// Extract Settings from `settings.json` file present at provided `dir_path`
-fn import_settings(dir_path: &Path) -> anyhow::Result<Settings> {
+fn import_settings(dir_path: impl AsRef<Path>) -> anyhow::Result<Settings> {
-    let path = dir_path.join("settings.json");
+    let path = dir_path.as_ref().join("settings.json");
     let file = File::open(path)?;
     let reader = std::io::BufReader::new(file);
     let metadata = serde_json::from_reader(reader)?;
 
     Ok(metadata)
 }
-
-
-pub fn import_index(size: usize, uuid: Uuid, dump_path: &Path, db_path: &Path, primary_key: Option<&str>) -> anyhow::Result<()> {
-    let index_path = db_path.join(&format!("indexes/index-{}", uuid));
-    info!("Importing a dump from an old version of meilisearch with dump version 1");
-
-    std::fs::create_dir_all(&index_path)?;
-    let mut options = EnvOpenOptions::new();
-    options.map_size(size);
-    let index = milli::Index::new(options, index_path)?;
-    let index = Index(Arc::new(index));
-
-    // extract `settings.json` file and import content
-    let settings = import_settings(&dump_path)?;
-    let settings: index_controller::Settings<Unchecked> = settings.into();
-    let update_builder = UpdateBuilder::new(0);
-    index.update_settings(&settings.check(), update_builder)?;
-
-    let update_builder = UpdateBuilder::new(1);
-    let file = File::open(&dump_path.join("documents.jsonl"))?;
-    let reader = std::io::BufReader::new(file);
-
-    // TODO: TAMO: waiting for milli. We should use the result
-    let _ = index.update_documents(
-        UpdateFormat::JsonStream,
-        IndexDocumentsMethod::ReplaceDocuments,
-        Some(reader),
-        update_builder,
-        primary_key,
-    );
-
-    // the last step: we extract the original milli::Index and close it
-    Arc::try_unwrap(index.0)
-        .map_err(|_e| "[dumps] At this point no one is supposed to have a reference on the index")
-        .unwrap()
-        .prepare_for_closing()
-        .wait();
-
-    // at this point we should handle the import of the updates, but since the update logic is not handled in
-    // meilisearch we are just going to ignore this part
-
-    Ok(())
-}

meilisearch-http/src/index_controller/dump_actor/loaders/v2.rs

@@ -0,0 +1,59 @@
+use std::path::Path;
+
+use chrono::{DateTime, Utc};
+use log::info;
+use serde::{Deserialize, Serialize};
+
+use crate::index::Index;
+use crate::index_controller::{update_actor::UpdateStore, uuid_resolver::HeedUuidStore};
+use crate::option::IndexerOpts;
+
+#[derive(Serialize, Deserialize, Debug)]
+#[serde(rename_all = "camelCase")]
+pub struct MetadataV2 {
+    db_version: String,
+    index_db_size: usize,
+    update_db_size: usize,
+    dump_date: DateTime<Utc>,
+}
+
+impl MetadataV2 {
+    pub fn new(index_db_size: usize, update_db_size: usize) -> Self {
+        Self {
+            db_version: env!("CARGO_PKG_VERSION").to_string(),
+            index_db_size,
+            update_db_size,
+            dump_date: Utc::now(),
+        }
+    }
+
+    pub fn load_dump(
+        self,
+        src: impl AsRef<Path>,
+        dst: impl AsRef<Path>,
+        index_db_size: usize,
+        update_db_size: usize,
+        indexing_options: &IndexerOpts,
+    ) -> anyhow::Result<()> {
+        info!(
+            "Loading dump from {}, dump database version: {}, dump version: V2",
+            self.dump_date, self.db_version
+        );
+
+        info!("Loading index database.");
+        HeedUuidStore::load_dump(src.as_ref(), &dst)?;
+
+        info!("Loading updates.");
+        UpdateStore::load_dump(&src, &dst, update_db_size)?;
+
+        info!("Loading indexes.");
+        let indexes_path = src.as_ref().join("indexes");
+        let indexes = indexes_path.read_dir()?;
+        for index in indexes {
+            let index = index?;
+            Index::load_dump(&index.path(), &dst, index_db_size, indexing_options)?;
+        }
+
+        Ok(())
+    }
+}

meilisearch-http/src/index_controller/dump_actor/message.rs

@@ -1,7 +1,6 @@
 use tokio::sync::oneshot;
 
-use super::{DumpResult, DumpInfo};
+use super::{DumpInfo, DumpResult};
-
 
 pub enum DumpMsg {
     CreateDump {
@@ -12,4 +11,3 @@ pub enum DumpMsg {
         ret: oneshot::Sender<DumpResult<DumpInfo>>,
     },
 }
-

meilisearch-http/src/index_controller/dump_actor/mod.rs

@@ -1,31 +1,32 @@
-mod actor;
+use std::fs::File;
-mod handle_impl;
+use std::path::{Path, PathBuf};
-mod message;
-mod v1;
-mod v2;
 
-use std::{fs::File, path::Path, sync::Arc};
+use anyhow::Context;
-
+use chrono::{DateTime, Utc};
-use anyhow::bail;
+use log::{error, info, warn};
-use heed::EnvOpenOptions;
-use log::{error, info};
-use milli::update::{IndexDocumentsMethod, UpdateBuilder, UpdateFormat};
 #[cfg(test)]
 use mockall::automock;
 use serde::{Deserialize, Serialize};
-use tempfile::TempDir;
 use thiserror::Error;
-use uuid::Uuid;
+use tokio::fs::create_dir_all;
 
-use super::IndexMetadata;
+use loaders::v1::MetadataV1;
-use crate::helpers::compression;
+use loaders::v2::MetadataV2;
-use crate::index::Index;
-use crate::index_controller::uuid_resolver;
 
 pub use actor::DumpActor;
 pub use handle_impl::*;
 pub use message::DumpMsg;
 
+use super::{update_actor::UpdateActorHandle, uuid_resolver::UuidResolverHandle};
+use crate::{helpers::compression, option::IndexerOpts};
+
+mod actor;
+mod handle_impl;
+mod loaders;
+mod message;
+
+const META_FILE_NAME: &str = "metadata.json";
+
 pub type DumpResult<T> = std::result::Result<T, DumpError>;
 
 #[derive(Error, Debug)]
@@ -40,31 +41,6 @@ pub enum DumpError {
     DumpDoesNotExist(String),
 }
 
-#[derive(Debug, Serialize, Deserialize, Copy, Clone)]
-enum DumpVersion {
-    V1,
-    V2,
-}
-
-impl DumpVersion {
-    const CURRENT: Self = Self::V2;
-
-    /// Select the good importation function from the `DumpVersion` of metadata
-    pub fn import_index(
-        self,
-        size: usize,
-        uuid: Uuid,
-        dump_path: &Path,
-        db_path: &Path,
-        primary_key: Option<&str>,
-    ) -> anyhow::Result<()> {
-        match self {
-            Self::V1 => v1::import_index(size, uuid, dump_path, db_path, primary_key),
-            Self::V2 => v2::import_index(size, uuid, dump_path, db_path, primary_key),
-        }
-    }
-}
-
 #[async_trait::async_trait]
 #[cfg_attr(test, automock)]
 pub trait DumpActorHandle {
@@ -78,39 +54,16 @@ pub trait DumpActorHandle {
 }
 
 #[derive(Debug, Serialize, Deserialize)]
-#[serde(rename_all = "camelCase")]
+#[serde(tag = "dumpVersion")]
-pub struct Metadata {
+pub enum Metadata {
-    indexes: Vec<IndexMetadata>,
+    V1(MetadataV1),
-    db_version: String,
+    V2(MetadataV2),
-    dump_version: DumpVersion,
 }
 
 impl Metadata {
-    /// Create a Metadata with the current dump version of meilisearch.
+    pub fn new_v2(index_db_size: usize, update_db_size: usize) -> Self {
-    pub fn new(indexes: Vec<IndexMetadata>, db_version: String) -> Self {
+        let meta = MetadataV2::new(index_db_size, update_db_size);
-        Metadata {
+        Self::V2(meta)
-            indexes,
-            db_version,
-            dump_version: DumpVersion::CURRENT,
-        }
-    }
-
-    /// Extract Metadata from `metadata.json` file present at provided `dir_path`
-    fn from_path(dir_path: &Path) -> anyhow::Result<Self> {
-        let path = dir_path.join("metadata.json");
-        let file = File::open(path)?;
-        let reader = std::io::BufReader::new(file);
-        let metadata = serde_json::from_reader(reader)?;
-
-        Ok(metadata)
-    }
-
-    /// Write Metadata in `metadata.json` file at provided `dir_path`
-    pub async fn to_path(&self, dir_path: &Path) -> anyhow::Result<()> {
-        let path = dir_path.join("metadata.json");
-        tokio::fs::write(path, serde_json::to_string(self)?).await?;
-
-        Ok(())
     }
 }
 
@@ -129,6 +82,9 @@ pub struct DumpInfo {
     pub status: DumpStatus,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub error: Option<String>,
+    started_at: DateTime<Utc>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    finished_at: Option<DateTime<Utc>>,
 }
 
 impl DumpInfo {
@@ -137,15 +93,19 @@ impl DumpInfo {
             uid,
             status,
             error: None,
+            started_at: Utc::now(),
+            finished_at: None,
         }
     }
 
     pub fn with_error(&mut self, error: String) {
         self.status = DumpStatus::Failed;
+        self.finished_at = Some(Utc::now());
         self.error = Some(error);
     }
 
     pub fn done(&mut self) {
+        self.finished_at = Some(Utc::now());
         self.status = DumpStatus::Done;
     }
 
@@ -155,80 +115,100 @@ impl DumpInfo {
 }
 
 pub fn load_dump(
-    db_path: impl AsRef<Path>,
+    dst_path: impl AsRef<Path>,
-    dump_path: impl AsRef<Path>,
+    src_path: impl AsRef<Path>,
-    size: usize,
+    index_db_size: usize,
+    update_db_size: usize,
+    indexer_opts: &IndexerOpts,
 ) -> anyhow::Result<()> {
-    info!("Importing dump from {}...", dump_path.as_ref().display());
+    let tmp_src = tempfile::tempdir_in(".")?;
-    let db_path = db_path.as_ref();
+    let tmp_src_path = tmp_src.path();
-    let dump_path = dump_path.as_ref();
-    let uuid_resolver = uuid_resolver::HeedUuidStore::new(&db_path)?;
 
-    // extract the dump in a temporary directory
+    compression::from_tar_gz(&src_path, tmp_src_path)?;
-    let tmp_dir = TempDir::new_in(db_path)?;
-    let tmp_dir_path = tmp_dir.path();
-    compression::from_tar_gz(dump_path, tmp_dir_path)?;
 
-    // read dump metadata
+    let meta_path = tmp_src_path.join(META_FILE_NAME);
-    let metadata = Metadata::from_path(&tmp_dir_path)?;
+    let mut meta_file = File::open(&meta_path)?;
+    let meta: Metadata = serde_json::from_reader(&mut meta_file)?;
 
-    // remove indexes which have same `uuid` than indexes to import and create empty indexes
+    let dst_dir = dst_path
-    let existing_index_uids = uuid_resolver.list()?;
+        .as_ref()
+        .parent()
+        .with_context(|| format!("Invalid db path: {}", dst_path.as_ref().display()))?;
 
-    info!("Deleting indexes already present in the db and provided in the dump...");
+    let tmp_dst = tempfile::tempdir_in(dst_dir)?;
-    for idx in &metadata.indexes {
+
-        if let Some((_, uuid)) = existing_index_uids.iter().find(|(s, _)| s == &idx.uid) {
+    match meta {
-            // if we find the index in the `uuid_resolver` it's supposed to exist on the file system
+        Metadata::V1(meta) => {
-            // and we want to delete it
+            meta.load_dump(&tmp_src_path, tmp_dst.path(), index_db_size, indexer_opts)?
-            let path = db_path.join(&format!("indexes/index-{}", uuid));
-            info!("Deleting {}", path.display());
-            use std::io::ErrorKind::*;
-            match std::fs::remove_dir_all(path) {
-                Ok(()) => (),
-                // if an index was present in the metadata but missing of the fs we can ignore the
-                // problem because we are going to create it later
-                Err(e) if e.kind() == NotFound => (),
-                Err(e) => bail!(e),
         }
-        } else {
+        Metadata::V2(meta) => meta.load_dump(
-            // if the index does not exist in the `uuid_resolver` we create it
+            &tmp_src_path,
-            uuid_resolver.create_uuid(idx.uid.clone(), false)?;
+            tmp_dst.path(),
+            index_db_size,
+            update_db_size,
+            indexer_opts,
+        )?,
     }
+    // Persist and atomically rename the db
+    let persisted_dump = tmp_dst.into_path();
+    if dst_path.as_ref().exists() {
+        warn!("Overwriting database at {}", dst_path.as_ref().display());
+        std::fs::remove_dir_all(&dst_path)?;
     }
 
-    // import each indexes content
+    std::fs::rename(&persisted_dump, &dst_path)?;
-    for idx in metadata.indexes {
-        let dump_path = tmp_dir_path.join(&idx.uid);
-        // this cannot fail since we created all the missing uuid in the previous loop
-        let uuid = uuid_resolver.get_uuid(idx.uid)?.unwrap();
 
-        info!(
-            "Importing dump from {} into {}...",
-            dump_path.display(),
-            db_path.display()
-        );
-        metadata.dump_version.import_index(
-            size,
-            uuid,
-            &dump_path,
-            &db_path,
-            idx.meta.primary_key.as_ref().map(|s| s.as_ref()),
-        )?;
-        info!("Dump importation from {} succeed", dump_path.display());
-    }
-
-    // finally we can move all the unprocessed update file into our new DB
-    // this directory may not exists
-    let update_path = tmp_dir_path.join("update_files");
-    let db_update_path = db_path.join("updates/update_files");
-    if update_path.exists() {
-        let _ = std::fs::remove_dir_all(db_update_path);
-        std::fs::rename(
-            tmp_dir_path.join("update_files"),
-            db_path.join("updates/update_files"),
-        )?;
-    }
-
-    info!("Dump importation from {} succeed", dump_path.display());
     Ok(())
 }
+
+struct DumpTask<U, P> {
+    path: PathBuf,
+    uuid_resolver: U,
+    update_handle: P,
+    uid: String,
+    update_db_size: usize,
+    index_db_size: usize,
+}
+
+impl<U, P> DumpTask<U, P>
+where
+    U: UuidResolverHandle + Send + Sync + Clone + 'static,
+    P: UpdateActorHandle + Send + Sync + Clone + 'static,
+{
+    async fn run(self) -> anyhow::Result<()> {
+        info!("Performing dump.");
+
+        create_dir_all(&self.path).await?;
+
+        let path_clone = self.path.clone();
+        let temp_dump_dir =
+            tokio::task::spawn_blocking(|| tempfile::TempDir::new_in(path_clone)).await??;
+        let temp_dump_path = temp_dump_dir.path().to_owned();
+
+        let meta = Metadata::new_v2(self.index_db_size, self.update_db_size);
+        let meta_path = temp_dump_path.join(META_FILE_NAME);
+        let mut meta_file = File::create(&meta_path)?;
+        serde_json::to_writer(&mut meta_file, &meta)?;
+
+        let uuids = self.uuid_resolver.dump(temp_dump_path.clone()).await?;
+
+        self.update_handle
+            .dump(uuids, temp_dump_path.clone())
+            .await?;
+
+        let dump_path = tokio::task::spawn_blocking(move || -> anyhow::Result<PathBuf> {
+            let temp_dump_file = tempfile::NamedTempFile::new_in(&self.path)?;
+            compression::to_tar_gz(temp_dump_path, temp_dump_file.path())?;
+
+            let dump_path = self.path.join(self.uid).with_extension("dump");
+            temp_dump_file.persist(&dump_path)?;
+
+            Ok(dump_path)
+        })
+        .await??;
+
+        info!("Created dump in {:?}.", dump_path);
+
+        Ok(())
+    }
+}

meilisearch-http/src/index_controller/dump_actor/v2.rs

@@ -1,89 +0,0 @@
-use heed::EnvOpenOptions;
-use log::info;
-use uuid::Uuid;
-use crate::{index::Unchecked, index_controller::{UpdateStatus, update_actor::UpdateStore}};
-use std::io::BufRead;
-use milli::{update::{IndexDocumentsMethod, UpdateBuilder, UpdateFormat}};
-use crate::index::{Checked, Index};
-use crate::index_controller::Settings;
-use std::{fs::File, path::Path, sync::Arc};
-
-/// Extract Settings from `settings.json` file present at provided `dir_path`
-fn import_settings(dir_path: &Path) -> anyhow::Result<Settings<Checked>> {
-    let path = dir_path.join("settings.json");
-    let file = File::open(path)?;
-    let reader = std::io::BufReader::new(file);
-    let metadata: Settings<Unchecked> = serde_json::from_reader(reader)?;
-
-    println!("Meta: {:?}", metadata);
-
-    Ok(metadata.check())
-}
-
-pub fn import_index(size: usize, uuid: Uuid, dump_path: &Path, db_path: &Path, primary_key: Option<&str>) -> anyhow::Result<()> {
-    let index_path = db_path.join(&format!("indexes/index-{}", uuid));
-    std::fs::create_dir_all(&index_path)?;
-    let mut options = EnvOpenOptions::new();
-    options.map_size(size);
-    let index = milli::Index::new(options, index_path)?;
-    let index = Index(Arc::new(index));
-
-    let mut txn = index.write_txn()?;
-
-    info!("importing the settings...");
-    // extract `settings.json` file and import content
-    let settings = import_settings(&dump_path)?;
-    let update_builder = UpdateBuilder::new(0);
-    index.update_settings_txn(&mut txn, &settings, update_builder)?;
-
-    // import the documents in the index
-    let update_builder = UpdateBuilder::new(1);
-    let file = File::open(&dump_path.join("documents.jsonl"))?;
-    let reader = std::io::BufReader::new(file);
-
-    info!("importing the documents...");
-    // TODO: TAMO: currently we ignore any error caused by the importation of the documents because
-    // if there is no documents nor primary key it'll throw an anyhow error, but we must remove
-    // this before the merge on main
-    index.update_documents_txn(
-        &mut txn,
-        UpdateFormat::JsonStream,
-        IndexDocumentsMethod::ReplaceDocuments,
-        Some(reader),
-        update_builder,
-        primary_key,
-    )?;
-
-    txn.commit()?;
-
-    // the last step: we extract the original milli::Index and close it
-    Arc::try_unwrap(index.0)
-        .map_err(|_e| "[dumps] At this point no one is supposed to have a reference on the index")
-        .unwrap()
-        .prepare_for_closing()
-        .wait();
-
-    info!("importing the updates...");
-    import_updates(uuid, dump_path, db_path)
-}
-
-fn import_updates(uuid: Uuid, dump_path: &Path, db_path: &Path) -> anyhow::Result<()> {
-        let update_path = db_path.join("updates");
-        let options = EnvOpenOptions::new();
-        // create an UpdateStore to import the updates
-        std::fs::create_dir_all(&update_path)?;
-        let (update_store, _) = UpdateStore::create(options, &update_path)?;
-        let file = File::open(&dump_path.join("updates.jsonl"))?;
-        let reader = std::io::BufReader::new(file);
-
-        let mut wtxn = update_store.env.write_txn()?;
-        for update in reader.lines() {
-            let mut update: UpdateStatus = serde_json::from_str(&update?)?;
-            if let Some(path) = update.content_path_mut() {
-                *path = update_path.join("update_files").join(&path);
-            }
-            update_store.register_raw_updates(&mut wtxn, update, uuid)?;
-        }
-        wtxn.commit()?;
-    Ok(())
-}

meilisearch-http/src/index_controller/index_actor/actor.rs

@@ -6,14 +6,15 @@ use async_stream::stream;
 use futures::stream::StreamExt;
 use heed::CompactionOption;
 use log::debug;
-use tokio::sync::mpsc;
 use tokio::task::spawn_blocking;
+use tokio::{fs, sync::mpsc};
 use uuid::Uuid;
 
-use crate::index::{Checked, Document, SearchQuery, SearchResult, Settings};
+use crate::index::{
+    update_handler::UpdateHandler, Checked, Document, SearchQuery, SearchResult, Settings,
+};
 use crate::index_controller::{
-    get_arc_ownership_blocking, update_handler::UpdateHandler, Failed, IndexStats, Processed,
+    get_arc_ownership_blocking, Failed, IndexStats, Processed, Processing,
-    Processing,
 };
 use crate::option::IndexerOpts;
 
@@ -30,10 +31,14 @@ pub struct IndexActor<S> {
 impl<S: IndexStore + Sync + Send> IndexActor<S> {
     pub fn new(receiver: mpsc::Receiver<IndexMsg>, store: S) -> IndexResult<Self> {
         let options = IndexerOpts::default();
-        let update_handler = UpdateHandler::new(&options).map_err(IndexError::Error)?;
+        let update_handler = UpdateHandler::new(&options)?;
         let update_handler = Arc::new(update_handler);
         let receiver = Some(receiver);
-        Ok(Self { receiver, update_handler, store })
+        Ok(Self {
+            receiver,
+            update_handler,
+            store,
+        })
     }
 
     /// `run` poll the write_receiver and read_receiver concurrently, but while messages send
@@ -122,8 +127,8 @@ impl<S: IndexStore + Sync + Send> IndexActor<S> {
             Snapshot { uuid, path, ret } => {
                 let _ = ret.send(self.handle_snapshot(uuid, path).await);
             }
-            Dump { uid, uuid, path, ret } => {
+            Dump { uuid, path, ret } => {
-                let _ = ret.send(self.handle_dump(&uid, uuid, path).await);
+                let _ = ret.send(self.handle_dump(uuid, path).await);
             }
             GetStats { uuid, ret } => {
                 let _ = ret.send(self.handle_get_stats(uuid).await);
@@ -146,9 +151,7 @@ impl<S: IndexStore + Sync + Send> IndexActor<S> {
         primary_key: Option<String>,
     ) -> IndexResult<IndexMeta> {
         let index = self.store.create(uuid, primary_key).await?;
-        let meta = spawn_blocking(move || IndexMeta::new(&index))
+        let meta = spawn_blocking(move || IndexMeta::new(&index)).await??;
-            .await
-            .map_err(|e| IndexError::Error(e.into()))??;
         Ok(meta)
     }
 
@@ -165,9 +168,9 @@ impl<S: IndexStore + Sync + Send> IndexActor<S> {
             None => self.store.create(uuid, None).await?,
         };
 
-        spawn_blocking(move || update_handler.handle_update(meta, data, index))
+        let result =
-            .await
+            spawn_blocking(move || update_handler.handle_update(meta, data, index)).await?;
-            .map_err(|e| IndexError::Error(e.into()))
+        Ok(result)
     }
 
     async fn handle_settings(&self, uuid: Uuid) -> IndexResult<Settings<Checked>> {
@@ -176,9 +179,8 @@ impl<S: IndexStore + Sync + Send> IndexActor<S> {
             .get(uuid)
             .await?
             .ok_or(IndexError::UnexistingIndex)?;
-        spawn_blocking(move || index.settings().map_err(IndexError::Error))
+        let result = spawn_blocking(move || index.settings()).await??;
-            .await
+        Ok(result)
-            .map_err(|e| IndexError::Error(e.into()))?
     }
 
     async fn handle_fetch_documents(
@@ -193,13 +195,11 @@ impl<S: IndexStore + Sync + Send> IndexActor<S> {
             .get(uuid)
             .await?
             .ok_or(IndexError::UnexistingIndex)?;
-        spawn_blocking(move || {
+        let result =
-            index
+            spawn_blocking(move || index.retrieve_documents(offset, limit, attributes_to_retrieve))
-                .retrieve_documents(offset, limit, attributes_to_retrieve)
+                .await??;
-                .map_err(IndexError::Error)
+
-        })
+        Ok(result)
-        .await
-        .map_err(|e| IndexError::Error(e.into()))?
     }
 
     async fn handle_fetch_document(
@@ -213,13 +213,12 @@ impl<S: IndexStore + Sync + Send> IndexActor<S> {
             .get(uuid)
             .await?
             .ok_or(IndexError::UnexistingIndex)?;
-        spawn_blocking(move || {
+
-            index
+        let result =
-                .retrieve_document(doc_id, attributes_to_retrieve)
+            spawn_blocking(move || index.retrieve_document(doc_id, attributes_to_retrieve))
-                .map_err(IndexError::Error)
+                .await??;
-        })
+
-        .await
+        Ok(result)
-        .map_err(|e| IndexError::Error(e.into()))?
     }
 
     async fn handle_delete(&self, uuid: Uuid) -> IndexResult<()> {
@@ -242,9 +241,7 @@ impl<S: IndexStore + Sync + Send> IndexActor<S> {
     async fn handle_get_meta(&self, uuid: Uuid) -> IndexResult<IndexMeta> {
         match self.store.get(uuid).await? {
             Some(index) => {
-                let meta = spawn_blocking(move || IndexMeta::new(&index))
+                let meta = spawn_blocking(move || IndexMeta::new(&index)).await??;
-                    .await
-                    .map_err(|e| IndexError::Error(e.into()))??;
                 Ok(meta)
             }
             None => Err(IndexError::UnexistingIndex),
@@ -262,7 +259,7 @@ impl<S: IndexStore + Sync + Send> IndexActor<S> {
             .await?
             .ok_or(IndexError::UnexistingIndex)?;
 
-        spawn_blocking(move || match index_settings.primary_key {
+        let result = spawn_blocking(move || match index_settings.primary_key {
             Some(ref primary_key) => {
                 let mut txn = index.write_txn()?;
                 if index.primary_key(&txn)?.is_some() {
@@ -278,23 +275,22 @@ impl<S: IndexStore + Sync + Send> IndexActor<S> {
                 Ok(meta)
             }
         })
-        .await
+        .await??;
-        .map_err(|e| IndexError::Error(e.into()))?
+
+        Ok(result)
     }
 
     async fn handle_snapshot(&self, uuid: Uuid, mut path: PathBuf) -> IndexResult<()> {
         use tokio::fs::create_dir_all;
 
         path.push("indexes");
-        create_dir_all(&path)
+        create_dir_all(&path).await?;
-            .await
-            .map_err(|e| IndexError::Error(e.into()))?;
 
         if let Some(index) = self.store.get(uuid).await? {
             let mut index_path = path.join(format!("index-{}", uuid));
-            create_dir_all(&index_path)
+
-                .await
+            create_dir_all(&index_path).await?;
-                .map_err(|e| IndexError::Error(e.into()))?;
+
             index_path.push("data.mdb");
             spawn_blocking(move || -> anyhow::Result<()> {
                 // Get write txn to wait for ongoing write transaction before snapshot.
@@ -304,9 +300,7 @@ impl<S: IndexStore + Sync + Send> IndexActor<S> {
                     .copy_to_path(index_path, CompactionOption::Enabled)?;
                 Ok(())
             })
-            .await
+            .await??;
-            .map_err(|e| IndexError::Error(e.into()))?
-            .map_err(IndexError::Error)?;
         }
 
         Ok(())
@@ -314,50 +308,17 @@ impl<S: IndexStore + Sync + Send> IndexActor<S> {
 
     /// Create a `documents.jsonl` and a `settings.json` in `path/uid/` with a dump of all the
     /// documents and all the settings.
-    async fn handle_dump(&self, uid: &str, uuid: Uuid, path: PathBuf) -> IndexResult<()> {
+    async fn handle_dump(&self, uuid: Uuid, path: PathBuf) -> IndexResult<()> {
-        use std::io::prelude::*;
+        let index = self
-        use tokio::fs::create_dir_all;
+            .store
+            .get(uuid)
+            .await?
+            .ok_or(IndexError::UnexistingIndex)?;
 
-        create_dir_all(&path)
+        let path = path.join(format!("indexes/index-{}/", uuid));
-            .await
+        fs::create_dir_all(&path).await?;
-            .map_err(|e| IndexError::Error(e.into()))?;
 
-        if let Some(index) = self.store.get(uuid).await? {
+        tokio::task::spawn_blocking(move || index.dump(path)).await??;
-            let documents_path = path.join(uid).join("documents.jsonl");
-            let settings_path = path.join(uid).join("settings.json");
-
-            spawn_blocking(move || -> anyhow::Result<()> {
-                // first we dump all the documents
-                let file = File::create(documents_path)?;
-                let mut file = std::io::BufWriter::new(file);
-
-                // Get write txn to wait for ongoing write transaction before dump.
-                let txn = index.write_txn()?;
-                let fields_ids_map = index.fields_ids_map(&txn)?;
-                // we want to save **all** the fields in the dump.
-                let fields_to_dump: Vec<u8> = fields_ids_map.iter().map(|(id, _)| id).collect();
-
-                for document in index.all_documents(&txn)? {
-                    let (_doc_id, document) = document?;
-                    let json = milli::obkv_to_json(&fields_to_dump, &fields_ids_map, document)?;
-                    file.write_all(serde_json::to_string(&json)?.as_bytes())?;
-                    file.write_all(b"\n")?;
-                }
-
-                // then we dump all the settings
-                let file = File::create(settings_path)?;
-                let mut file = std::io::BufWriter::new(file);
-                let settings = index.settings()?;
-
-                file.write_all(serde_json::to_string(&settings)?.as_bytes())?;
-                file.write_all(b"\n")?;
-
-                Ok(())
-            })
-            .await
-            .map_err(|e| IndexError::Error(e.into()))?
-            .map_err(IndexError::Error)?;
-        }
 
         Ok(())
     }
@@ -379,7 +340,6 @@ impl<S: IndexStore + Sync + Send> IndexActor<S> {
                 fields_distribution: index.fields_distribution(&rtxn)?,
             })
         })
-        .await
+        .await?
-        .map_err(|e| IndexError::Error(e.into()))?
     }
 }

meilisearch-http/src/index_controller/index_actor/handle_impl.rs

@@ -3,7 +3,10 @@ use std::path::{Path, PathBuf};
 use tokio::sync::{mpsc, oneshot};
 use uuid::Uuid;
 
-use crate::{index::Checked, index_controller::{IndexSettings, IndexStats, Processing}};
+use crate::{
+    index::Checked,
+    index_controller::{IndexSettings, IndexStats, Processing},
+};
 use crate::{
     index::{Document, SearchQuery, SearchResult, Settings},
     index_controller::{Failed, Processed},
@@ -136,9 +139,9 @@ impl IndexActorHandle for IndexActorHandleImpl {
         Ok(receiver.await.expect("IndexActor has been killed")?)
     }
 
-    async fn dump(&self, uid: String, uuid: Uuid, path: PathBuf) -> IndexResult<()> {
+    async fn dump(&self, uuid: Uuid, path: PathBuf) -> IndexResult<()> {
         let (ret, receiver) = oneshot::channel();
-        let msg = IndexMsg::Dump { uid, uuid, path, ret };
+        let msg = IndexMsg::Dump { uuid, path, ret };
         let _ = self.sender.send(msg).await;
         Ok(receiver.await.expect("IndexActor has been killed")?)
     }

meilisearch-http/src/index_controller/index_actor/message.rs

@@ -3,7 +3,7 @@ use std::path::PathBuf;
 use tokio::sync::oneshot;
 use uuid::Uuid;
 
-use crate::index::{Document, SearchQuery, SearchResult, Settings, Checked};
+use crate::index::{Checked, Document, SearchQuery, SearchResult, Settings};
 use crate::index_controller::{Failed, IndexStats, Processed, Processing};
 
 use super::{IndexMeta, IndexResult, IndexSettings};
@@ -61,7 +61,6 @@ pub enum IndexMsg {
         ret: oneshot::Sender<IndexResult<()>>,
     },
     Dump {
-        uid: String,
         uuid: Uuid,
         path: PathBuf,
         ret: oneshot::Sender<IndexResult<()>>,

meilisearch-http/src/index_controller/index_actor/mod.rs

@@ -15,7 +15,7 @@ use message::IndexMsg;
 use store::{IndexStore, MapIndexStore};
 
 use crate::index::{Checked, Document, Index, SearchQuery, SearchResult, Settings};
-use crate::index_controller::{Failed, Processed, Processing, IndexStats};
+use crate::index_controller::{Failed, IndexStats, Processed, Processing};
 
 use super::IndexSettings;
 
@@ -44,24 +44,45 @@ impl IndexMeta {
         let created_at = index.created_at(&txn)?;
         let updated_at = index.updated_at(&txn)?;
         let primary_key = index.primary_key(&txn)?.map(String::from);
-        Ok(Self { created_at, updated_at, primary_key })
+        Ok(Self {
+            created_at,
+            updated_at,
+            primary_key,
+        })
     }
 }
 
 #[derive(Error, Debug)]
 pub enum IndexError {
-    #[error("error with index: {0}")]
-    Error(#[from] anyhow::Error),
     #[error("index already exists")]
     IndexAlreadyExists,
     #[error("Index doesn't exists")]
     UnexistingIndex,
-    #[error("Heed error: {0}")]
-    HeedError(#[from] heed::Error),
     #[error("Existing primary key")]
     ExistingPrimaryKey,
+    #[error("Internal Index Error: {0}")]
+    Internal(String),
 }
 
+macro_rules! internal_error {
+    ($($other:path), *) => {
+        $(
+            impl From<$other> for IndexError {
+                fn from(other: $other) -> Self {
+                    Self::Internal(other.to_string())
+                }
+            }
+        )*
+    }
+}
+
+internal_error!(
+    anyhow::Error,
+    heed::Error,
+    tokio::task::JoinError,
+    std::io::Error
+);
+
 #[async_trait::async_trait]
 #[cfg_attr(test, automock)]
 pub trait IndexActorHandle {
@@ -97,7 +118,7 @@ pub trait IndexActorHandle {
         index_settings: IndexSettings,
     ) -> IndexResult<IndexMeta>;
     async fn snapshot(&self, uuid: Uuid, path: PathBuf) -> IndexResult<()>;
-    async fn dump(&self, uid: String, uuid: Uuid, path: PathBuf) -> IndexResult<()>;
+    async fn dump(&self, uuid: Uuid, path: PathBuf) -> IndexResult<()>;
     async fn get_index_stats(&self, uuid: Uuid) -> IndexResult<IndexStats>;
 }
 
@@ -178,8 +199,8 @@ mod test {
             self.as_ref().snapshot(uuid, path).await
         }
 
-        async fn dump(&self, uid: String, uuid: Uuid, path: PathBuf) -> IndexResult<()> {
+        async fn dump(&self, uuid: Uuid, path: PathBuf) -> IndexResult<()> {
-            self.as_ref().dump(uid, uuid, path).await
+            self.as_ref().dump(uuid, path).await
         }
 
         async fn get_index_stats(&self, uuid: Uuid) -> IndexResult<IndexStats> {

meilisearch-http/src/index_controller/index_actor/store.rs

@@ -2,7 +2,6 @@ use std::collections::HashMap;
 use std::path::{Path, PathBuf};
 use std::sync::Arc;
 
-use heed::EnvOpenOptions;
 use tokio::fs;
 use tokio::sync::RwLock;
 use tokio::task::spawn_blocking;
@@ -48,7 +47,7 @@ impl IndexStore for MapIndexStore {
 
         let index_size = self.index_size;
         let index = spawn_blocking(move || -> IndexResult<Index> {
-            let index = open_index(&path, index_size)?;
+            let index = Index::open(path, index_size)?;
             if let Some(primary_key) = primary_key {
                 let mut txn = index.write_txn()?;
                 index.put_primary_key(&mut txn, &primary_key)?;
@@ -56,8 +55,7 @@ impl IndexStore for MapIndexStore {
             }
             Ok(index)
         })
-        .await
+        .await??;
-        .map_err(|e| IndexError::Error(e.into()))??;
 
         self.index_store.write().await.insert(uuid, index.clone());
 
@@ -77,9 +75,7 @@ impl IndexStore for MapIndexStore {
                 }
 
                 let index_size = self.index_size;
-                let index = spawn_blocking(move || open_index(path, index_size))
+                let index = spawn_blocking(move || Index::open(path, index_size)).await??;
-                    .await
-                    .map_err(|e| IndexError::Error(e.into()))??;
                 self.index_store.write().await.insert(uuid, index.clone());
                 Ok(Some(index))
             }
@@ -88,18 +84,8 @@ impl IndexStore for MapIndexStore {
 
     async fn delete(&self, uuid: Uuid) -> IndexResult<Option<Index>> {
         let db_path = self.path.join(format!("index-{}", uuid));
-        fs::remove_dir_all(db_path)
+        fs::remove_dir_all(db_path).await?;
-            .await
-            .map_err(|e| IndexError::Error(e.into()))?;
         let index = self.index_store.write().await.remove(&uuid);
         Ok(index)
     }
 }
-
-fn open_index(path: impl AsRef<Path>, size: usize) -> IndexResult<Index> {
-    std::fs::create_dir_all(&path).map_err(|e| IndexError::Error(e.into()))?;
-    let mut options = EnvOpenOptions::new();
-    options.map_size(size);
-    let index = milli::Index::new(options, &path).map_err(IndexError::Error)?;
-    Ok(Index(Arc::new(index)))
-}

meilisearch-http/src/index_controller/mod.rs

@@ -14,24 +14,23 @@ use tokio::sync::mpsc;
 use tokio::time::sleep;
 use uuid::Uuid;
 
-pub use updates::*;
-pub use dump_actor::{DumpInfo, DumpStatus};
 use dump_actor::DumpActorHandle;
+pub use dump_actor::{DumpInfo, DumpStatus};
 use index_actor::IndexActorHandle;
-use snapshot::{SnapshotService, load_snapshot};
+use snapshot::{load_snapshot, SnapshotService};
 use update_actor::UpdateActorHandle;
-use uuid_resolver::{UuidError, UuidResolverHandle};
+pub use updates::*;
+use uuid_resolver::{UuidResolverError, UuidResolverHandle};
 
 use crate::index::{Checked, Document, SearchQuery, SearchResult, Settings};
 use crate::option::Opt;
 
-use dump_actor::load_dump;
+use self::dump_actor::load_dump;
 
+mod dump_actor;
 mod index_actor;
 mod snapshot;
-mod dump_actor;
 mod update_actor;
-mod update_handler;
 mod updates;
 mod uuid_resolver;
 
@@ -94,13 +93,14 @@ impl IndexController {
                 options.ignore_snapshot_if_db_exists,
                 options.ignore_missing_snapshot,
             )?;
-        } else if let Some(ref path) = options.import_dump {
+        } else if let Some(ref src_path) = options.import_dump {
             load_dump(
                 &options.db_path,
-                path,
+                src_path,
-                index_size,
+                options.max_mdb_size.get_bytes() as usize,
+                options.max_udb_size.get_bytes() as usize,
+                &options.indexer_options,
             )?;
-
         }
 
         std::fs::create_dir_all(&path)?;
@@ -112,7 +112,13 @@ impl IndexController {
             &path,
             update_store_size,
         )?;
-        let dump_handle = dump_actor::DumpActorHandleImpl::new(&options.dumps_dir, uuid_resolver.clone(), index_handle.clone(), update_handle.clone())?;
+        let dump_handle = dump_actor::DumpActorHandleImpl::new(
+            &options.dumps_dir,
+            uuid_resolver.clone(),
+            update_handle.clone(),
+            options.max_mdb_size.get_bytes() as usize,
+            options.max_udb_size.get_bytes() as usize,
+        )?;
 
         if options.schedule_snapshot {
             let snapshot_service = SnapshotService::new(
@@ -159,11 +165,6 @@ impl IndexController {
             // registered and the update_actor that waits for the the payload to be sent to it.
             tokio::task::spawn_local(async move {
                 payload
-                    .map(|bytes| {
-                        bytes.map_err(|e| {
-                            Box::new(e) as Box<dyn std::error::Error + Sync + Send + 'static>
-                        })
-                    })
                     .for_each(|r| async {
                         let _ = sender.send(r).await;
                     })
@@ -176,7 +177,7 @@ impl IndexController {
 
         match self.uuid_resolver.get(uid).await {
             Ok(uuid) => Ok(perform_update(uuid).await?),
-            Err(UuidError::UnexistingIndex(name)) => {
+            Err(UuidResolverError::UnexistingIndex(name)) => {
                 let uuid = Uuid::new_v4();
                 let status = perform_update(uuid).await?;
                 // ignore if index creation fails now, since it may already have been created
@@ -230,7 +231,7 @@ impl IndexController {
 
         match self.uuid_resolver.get(uid).await {
             Ok(uuid) => Ok(perform_udpate(uuid).await?),
-            Err(UuidError::UnexistingIndex(name)) if create => {
+            Err(UuidResolverError::UnexistingIndex(name)) if create => {
                 let uuid = Uuid::new_v4();
                 let status = perform_udpate(uuid).await?;
                 // ignore if index creation fails now, since it may already have been created

meilisearch-http/src/index_controller/snapshot.rs

@@ -144,7 +144,7 @@ mod test {
     use crate::index_controller::update_actor::{
         MockUpdateActorHandle, UpdateActorHandleImpl, UpdateError,
     };
-    use crate::index_controller::uuid_resolver::{MockUuidResolverHandle, UuidError};
+    use crate::index_controller::uuid_resolver::{MockUuidResolverHandle, UuidResolverError};
 
     #[actix_rt::test]
     async fn test_normal() {
@@ -193,7 +193,7 @@ mod test {
             .expect_snapshot()
             .times(1)
             // abitrary error
-            .returning(|_| Box::pin(err(UuidError::NameAlreadyExist)));
+            .returning(|_| Box::pin(err(UuidResolverError::NameAlreadyExist)));
 
         let update_handle = MockUpdateActorHandle::new();
 
@@ -248,7 +248,7 @@ mod test {
             // we expect the funtion to be called between 2 and 3 time in the given interval.
             .times(2..4)
             // abitrary error, to short-circuit the function
-            .returning(move |_| Box::pin(err(UuidError::NameAlreadyExist)));
+            .returning(move |_| Box::pin(err(UuidResolverError::NameAlreadyExist)));
 
         let update_handle = MockUpdateActorHandle::new();
 

meilisearch-http/src/index_controller/update_actor/actor.rs

@@ -11,7 +11,7 @@ use tokio::sync::mpsc;
 use uuid::Uuid;
 
 use super::{PayloadData, Result, UpdateError, UpdateMsg, UpdateStore, UpdateStoreInfo};
-use crate::index_controller::index_actor::{IndexActorHandle};
+use crate::index_controller::index_actor::IndexActorHandle;
 use crate::index_controller::{UpdateMeta, UpdateStatus};
 
 pub struct UpdateActor<D, I> {
@@ -42,7 +42,12 @@ where
         let store = UpdateStore::open(options, &path, index_handle.clone())?;
         std::fs::create_dir_all(path.join("update_files"))?;
         assert!(path.exists());
-        Ok(Self { path, store, inbox, index_handle })
+        Ok(Self {
+            path,
+            store,
+            inbox,
+            index_handle,
+        })
     }
 
     pub async fn run(mut self) {
@@ -90,9 +95,7 @@ where
         mut payload: mpsc::Receiver<PayloadData<D>>,
     ) -> Result<UpdateStatus> {
         let file_path = match meta {
-            UpdateMeta::DocumentsAddition { .. }
+            UpdateMeta::DocumentsAddition { .. } | UpdateMeta::DeleteDocuments => {
-            | UpdateMeta::DeleteDocuments => {
-
                 let update_file_id = uuid::Uuid::new_v4();
                 let path = self
                     .path
@@ -102,39 +105,26 @@ where
                     .write(true)
                     .create(true)
                     .open(&path)
-                    .await
+                    .await?;
-                    .map_err(|e| UpdateError::Error(Box::new(e)))?;
 
                 let mut file_len = 0;
                 while let Some(bytes) = payload.recv().await {
-                    match bytes {
+                    let bytes = bytes?;
-                        Ok(bytes) => {
                     file_len += bytes.as_ref().len();
-                            file.write_all(bytes.as_ref())
+                    file.write_all(bytes.as_ref()).await?;
-                                .await
-                                .map_err(|e| UpdateError::Error(Box::new(e)))?;
-                            }
-                        Err(e) => {
-                            return Err(UpdateError::Error(e));
-                        }
-                    }
                 }
 
                 if file_len != 0 {
-                    file.flush()
+                    file.flush().await?;
-                        .await
-                        .map_err(|e| UpdateError::Error(Box::new(e)))?;
                     let file = file.into_std().await;
-                    Some((file, path))
+                    Some((file, update_file_id))
                 } else {
                     // empty update, delete the empty file.
-                    fs::remove_file(&path)
+                    fs::remove_file(&path).await?;
-                        .await
-                        .map_err(|e| UpdateError::Error(Box::new(e)))?;
                     None
                 }
             }
-            _ => None
+            _ => None,
         };
 
         let update_store = self.store.clone();
@@ -143,52 +133,45 @@ where
             use std::io::{copy, sink, BufReader, Seek};
 
             // If the payload is empty, ignore the check.
-            let path = if let Some((mut file, path)) = file_path {
+            let update_uuid = if let Some((mut file, uuid)) = file_path {
                 // set the file back to the beginning
-                file.seek(SeekFrom::Start(0)).map_err(|e| UpdateError::Error(Box::new(e)))?;
+                file.seek(SeekFrom::Start(0))?;
                 // Check that the json payload is valid:
                 let reader = BufReader::new(&mut file);
                 let mut checker = JsonChecker::new(reader);
 
                 if copy(&mut checker, &mut sink()).is_err() || checker.finish().is_err() {
                     // The json file is invalid, we use Serde to get a nice error message:
-                    file.seek(SeekFrom::Start(0))
+                    file.seek(SeekFrom::Start(0))?;
-                        .map_err(|e| UpdateError::Error(Box::new(e)))?;
+                    let _: serde_json::Value = serde_json::from_reader(file)?;
-                    let _: serde_json::Value = serde_json::from_reader(file)
-                        .map_err(|e| UpdateError::Error(Box::new(e)))?;
                 }
-                Some(path)
+                Some(uuid)
             } else {
                 None
             };
 
             // The payload is valid, we can register it to the update store.
-            update_store
+            let status = update_store
-                .register_update(meta, path, uuid)
+                .register_update(meta, update_uuid, uuid)
-                .map(UpdateStatus::Enqueued)
+                .map(UpdateStatus::Enqueued)?;
-                .map_err(|e| UpdateError::Error(Box::new(e)))
+            Ok(status)
         })
-        .await
+        .await?
-        .map_err(|e| UpdateError::Error(Box::new(e)))?
     }
 
     async fn handle_list_updates(&self, uuid: Uuid) -> Result<Vec<UpdateStatus>> {
         let update_store = self.store.clone();
         tokio::task::spawn_blocking(move || {
-            let result = update_store
+            let result = update_store.list(uuid)?;
-                .list(uuid)
-                .map_err(|e| UpdateError::Error(e.into()))?;
             Ok(result)
         })
-        .await
+        .await?
-        .map_err(|e| UpdateError::Error(Box::new(e)))?
     }
 
     async fn handle_get_update(&self, uuid: Uuid, id: u64) -> Result<UpdateStatus> {
         let store = self.store.clone();
         let result = store
-            .meta(uuid, id)
+            .meta(uuid, id)?
-            .map_err(|e| UpdateError::Error(Box::new(e)))?
             .ok_or(UpdateError::UnexistingUpdate(id))?;
         Ok(result)
     }
@@ -196,10 +179,7 @@ where
     async fn handle_delete(&self, uuid: Uuid) -> Result<()> {
         let store = self.store.clone();
 
-        tokio::task::spawn_blocking(move || store.delete_all(uuid))
+        tokio::task::spawn_blocking(move || store.delete_all(uuid)).await??;
-            .await
-            .map_err(|e| UpdateError::Error(e.into()))?
-            .map_err(|e| UpdateError::Error(e.into()))?;
 
         Ok(())
     }
@@ -209,23 +189,21 @@ where
         let update_store = self.store.clone();
 
         tokio::task::spawn_blocking(move || update_store.snapshot(&uuids, &path, index_handle))
-        .await
+            .await??;
-        .map_err(|e| UpdateError::Error(e.into()))?
-        .map_err(|e| UpdateError::Error(e.into()))?;
 
         Ok(())
     }
 
-    async fn handle_dump(&self, uuids: HashSet<(String, Uuid)>, path: PathBuf) -> Result<()> {
+    async fn handle_dump(&self, uuids: HashSet<Uuid>, path: PathBuf) -> Result<()> {
         let index_handle = self.index_handle.clone();
         let update_store = self.store.clone();
+
         tokio::task::spawn_blocking(move || -> anyhow::Result<()> {
             update_store.dump(&uuids, path.to_path_buf(), index_handle)?;
             Ok(())
         })
-        .await
+        .await??;
-            .map_err(|e| UpdateError::Error(e.into()))?
+
-            .map_err(|e| UpdateError::Error(e.into()))?;
         Ok(())
     }
 
@@ -235,9 +213,7 @@ where
             let info = update_store.get_info()?;
             Ok(info)
         })
-        .await
+        .await??;
-        .map_err(|e| UpdateError::Error(e.into()))?
-        .map_err(|e| UpdateError::Error(e.into()))?;
 
         Ok(info)
     }

meilisearch-http/src/index_controller/update_actor/handle_impl.rs

@@ -71,7 +71,7 @@ where
         receiver.await.expect("update actor killed.")
     }
 
-    async fn dump(&self, uuids: HashSet<(String, Uuid)>, path: PathBuf) -> Result<()> {
+    async fn dump(&self, uuids: HashSet<Uuid>, path: PathBuf) -> Result<()> {
         let (ret, receiver) = oneshot::channel();
         let msg = UpdateMsg::Dump { uuids, path, ret };
         let _ = self.sender.send(msg).await;

meilisearch-http/src/index_controller/update_actor/message.rs

@@ -32,7 +32,7 @@ pub enum UpdateMsg<D> {
         ret: oneshot::Sender<Result<()>>,
     },
     Dump {
-        uuids: HashSet<(String, Uuid)>,
+        uuids: HashSet<Uuid>,
         path: PathBuf,
         ret: oneshot::Sender<Result<()>>,
     },

meilisearch-http/src/index_controller/update_actor/mod.rs

@@ -1,10 +1,11 @@
 mod actor;
 mod handle_impl;
 mod message;
-mod update_store;
+pub mod store;
 
 use std::{collections::HashSet, path::PathBuf};
 
+use actix_http::error::PayloadError;
 use thiserror::Error;
 use tokio::sync::mpsc;
 use uuid::Uuid;
@@ -14,23 +15,44 @@ use crate::index_controller::{UpdateMeta, UpdateStatus};
 use actor::UpdateActor;
 use message::UpdateMsg;
 
-pub use update_store::{UpdateStore, UpdateStoreInfo};
 pub use handle_impl::UpdateActorHandleImpl;
+pub use store::{UpdateStore, UpdateStoreInfo};
 
 pub type Result<T> = std::result::Result<T, UpdateError>;
-type PayloadData<D> = std::result::Result<D, Box<dyn std::error::Error + Sync + Send + 'static>>;
+type PayloadData<D> = std::result::Result<D, PayloadError>;
 
 #[cfg(test)]
 use mockall::automock;
 
 #[derive(Debug, Error)]
 pub enum UpdateError {
-    #[error("error with update: {0}")]
-    Error(Box<dyn std::error::Error + Sync + Send + 'static>),
     #[error("Update {0} doesn't exist.")]
     UnexistingUpdate(u64),
+    #[error("Internal error processing update: {0}")]
+    Internal(String),
 }
 
+macro_rules! internal_error {
+    ($($other:path), *) => {
+        $(
+            impl From<$other> for UpdateError {
+                fn from(other: $other) -> Self {
+                    Self::Internal(other.to_string())
+                }
+            }
+        )*
+    }
+}
+
+internal_error!(
+    heed::Error,
+    std::io::Error,
+    serde_json::Error,
+    PayloadError,
+    tokio::task::JoinError,
+    anyhow::Error
+);
+
 #[async_trait::async_trait]
 #[cfg_attr(test, automock(type Data=Vec<u8>;))]
 pub trait UpdateActorHandle {
@@ -40,7 +62,7 @@ pub trait UpdateActorHandle {
     async fn update_status(&self, uuid: Uuid, id: u64) -> Result<UpdateStatus>;
     async fn delete(&self, uuid: Uuid) -> Result<()>;
     async fn snapshot(&self, uuid: HashSet<Uuid>, path: PathBuf) -> Result<()>;
-    async fn dump(&self, uuid: HashSet<(String, Uuid)>, path: PathBuf) -> Result<()>;
+    async fn dump(&self, uuids: HashSet<Uuid>, path: PathBuf) -> Result<()>;
     async fn get_info(&self) -> Result<UpdateStoreInfo>;
     async fn update(
         &self,

meilisearch-http/src/index_controller/update_actor/store/codec.rs

@@ -0,0 +1,86 @@
+use std::{borrow::Cow, convert::TryInto, mem::size_of};
+
+use heed::{BytesDecode, BytesEncode};
+use uuid::Uuid;
+
+pub struct NextIdCodec;
+
+pub enum NextIdKey {
+    Global,
+    Index(Uuid),
+}
+
+impl<'a> BytesEncode<'a> for NextIdCodec {
+    type EItem = NextIdKey;
+
+    fn bytes_encode(item: &'a Self::EItem) -> Option<Cow<'a, [u8]>> {
+        match item {
+            NextIdKey::Global => Some(Cow::Borrowed(b"__global__")),
+            NextIdKey::Index(ref uuid) => Some(Cow::Borrowed(uuid.as_bytes())),
+        }
+    }
+}
+
+pub struct PendingKeyCodec;
+
+impl<'a> BytesEncode<'a> for PendingKeyCodec {
+    type EItem = (u64, Uuid, u64);
+
+    fn bytes_encode((global_id, uuid, update_id): &'a Self::EItem) -> Option<Cow<'a, [u8]>> {
+        let mut bytes = Vec::with_capacity(size_of::<Self::EItem>());
+        bytes.extend_from_slice(&global_id.to_be_bytes());
+        bytes.extend_from_slice(uuid.as_bytes());
+        bytes.extend_from_slice(&update_id.to_be_bytes());
+        Some(Cow::Owned(bytes))
+    }
+}
+
+impl<'a> BytesDecode<'a> for PendingKeyCodec {
+    type DItem = (u64, Uuid, u64);
+
+    fn bytes_decode(bytes: &'a [u8]) -> Option<Self::DItem> {
+        let global_id_bytes = bytes.get(0..size_of::<u64>())?.try_into().ok()?;
+        let global_id = u64::from_be_bytes(global_id_bytes);
+
+        let uuid_bytes = bytes
+            .get(size_of::<u64>()..(size_of::<u64>() + size_of::<Uuid>()))?
+            .try_into()
+            .ok()?;
+        let uuid = Uuid::from_bytes(uuid_bytes);
+
+        let update_id_bytes = bytes
+            .get((size_of::<u64>() + size_of::<Uuid>())..)?
+            .try_into()
+            .ok()?;
+        let update_id = u64::from_be_bytes(update_id_bytes);
+
+        Some((global_id, uuid, update_id))
+    }
+}
+
+pub struct UpdateKeyCodec;
+
+impl<'a> BytesEncode<'a> for UpdateKeyCodec {
+    type EItem = (Uuid, u64);
+
+    fn bytes_encode((uuid, update_id): &'a Self::EItem) -> Option<Cow<'a, [u8]>> {
+        let mut bytes = Vec::with_capacity(size_of::<Self::EItem>());
+        bytes.extend_from_slice(uuid.as_bytes());
+        bytes.extend_from_slice(&update_id.to_be_bytes());
+        Some(Cow::Owned(bytes))
+    }
+}
+
+impl<'a> BytesDecode<'a> for UpdateKeyCodec {
+    type DItem = (Uuid, u64);
+
+    fn bytes_decode(bytes: &'a [u8]) -> Option<Self::DItem> {
+        let uuid_bytes = bytes.get(0..size_of::<Uuid>())?.try_into().ok()?;
+        let uuid = Uuid::from_bytes(uuid_bytes);
+
+        let update_id_bytes = bytes.get(size_of::<Uuid>()..)?.try_into().ok()?;
+        let update_id = u64::from_be_bytes(update_id_bytes);
+
+        Some((uuid, update_id))
+    }
+}

meilisearch-http/src/index_controller/update_actor/store/dump.rs

@@ -0,0 +1,189 @@
+use std::{
+    collections::HashSet,
+    fs::{create_dir_all, File},
+    io::{BufRead, BufReader, Write},
+    path::{Path, PathBuf},
+};
+
+use heed::{EnvOpenOptions, RoTxn};
+use serde::{Deserialize, Serialize};
+use uuid::Uuid;
+
+use super::UpdateStore;
+use super::{codec::UpdateKeyCodec, State};
+use crate::index_controller::{
+    index_actor::IndexActorHandle, update_actor::store::update_uuid_to_file_path, Enqueued,
+    UpdateStatus,
+};
+
+#[derive(Serialize, Deserialize)]
+struct UpdateEntry {
+    uuid: Uuid,
+    update: UpdateStatus,
+}
+
+impl UpdateStore {
+    pub fn dump(
+        &self,
+        uuids: &HashSet<Uuid>,
+        path: PathBuf,
+        handle: impl IndexActorHandle,
+    ) -> anyhow::Result<()> {
+        let state_lock = self.state.write();
+        state_lock.swap(State::Dumping);
+
+        // txn must *always* be acquired after state lock, or it will dead lock.
+        let txn = self.env.write_txn()?;
+
+        let dump_path = path.join("updates");
+        create_dir_all(&dump_path)?;
+
+        self.dump_updates(&txn, uuids, &dump_path)?;
+
+        let fut = dump_indexes(uuids, handle, &path);
+        tokio::runtime::Handle::current().block_on(fut)?;
+
+        state_lock.swap(State::Idle);
+
+        Ok(())
+    }
+
+    fn dump_updates(
+        &self,
+        txn: &RoTxn,
+        uuids: &HashSet<Uuid>,
+        path: impl AsRef<Path>,
+    ) -> anyhow::Result<()> {
+        let dump_data_path = path.as_ref().join("data.jsonl");
+        let mut dump_data_file = File::create(dump_data_path)?;
+
+        let update_files_path = path.as_ref().join(super::UPDATE_DIR);
+        create_dir_all(&update_files_path)?;
+
+        self.dump_pending(&txn, uuids, &mut dump_data_file, &path)?;
+        self.dump_completed(&txn, uuids, &mut dump_data_file)?;
+
+        Ok(())
+    }
+
+    fn dump_pending(
+        &self,
+        txn: &RoTxn,
+        uuids: &HashSet<Uuid>,
+        mut file: &mut File,
+        dst_path: impl AsRef<Path>,
+    ) -> anyhow::Result<()> {
+        let pendings = self.pending_queue.iter(txn)?.lazily_decode_data();
+
+        for pending in pendings {
+            let ((_, uuid, _), data) = pending?;
+            if uuids.contains(&uuid) {
+                let update = data.decode()?;
+
+                if let Some(ref update_uuid) = update.content {
+                    let src = super::update_uuid_to_file_path(&self.path, *update_uuid);
+                    let dst = super::update_uuid_to_file_path(&dst_path, *update_uuid);
+                    std::fs::copy(src, dst)?;
+                }
+
+                let update_json = UpdateEntry {
+                    uuid,
+                    update: update.into(),
+                };
+
+                serde_json::to_writer(&mut file, &update_json)?;
+                file.write_all(b"\n")?;
+            }
+        }
+
+        Ok(())
+    }
+
+    fn dump_completed(
+        &self,
+        txn: &RoTxn,
+        uuids: &HashSet<Uuid>,
+        mut file: &mut File,
+    ) -> anyhow::Result<()> {
+        let updates = self
+            .updates
+            .iter(txn)?
+            .remap_key_type::<UpdateKeyCodec>()
+            .lazily_decode_data();
+
+        for update in updates {
+            let ((uuid, _), data) = update?;
+            if uuids.contains(&uuid) {
+                let update = data.decode()?;
+
+                let update_json = UpdateEntry { uuid, update };
+
+                serde_json::to_writer(&mut file, &update_json)?;
+                file.write_all(b"\n")?;
+            }
+        }
+
+        Ok(())
+    }
+
+    pub fn load_dump(
+        src: impl AsRef<Path>,
+        dst: impl AsRef<Path>,
+        db_size: usize,
+    ) -> anyhow::Result<()> {
+        let dst_update_path = dst.as_ref().join("updates/");
+        create_dir_all(&dst_update_path)?;
+
+        let mut options = EnvOpenOptions::new();
+        options.map_size(db_size as usize);
+        let (store, _) = UpdateStore::new(options, &dst_update_path)?;
+
+        let src_update_path = src.as_ref().join("updates");
+        let update_data = File::open(&src_update_path.join("data.jsonl"))?;
+        let mut update_data = BufReader::new(update_data);
+
+        std::fs::create_dir_all(dst_update_path.join("update_files/"))?;
+
+        let mut wtxn = store.env.write_txn()?;
+        let mut line = String::new();
+        loop {
+            match update_data.read_line(&mut line) {
+                Ok(0) => break,
+                Ok(_) => {
+                    let UpdateEntry { uuid, update } = serde_json::from_str(&line)?;
+                    store.register_raw_updates(&mut wtxn, &update, uuid)?;
+
+                    // Copy ascociated update path if it exists
+                    if let UpdateStatus::Enqueued(Enqueued {
+                        content: Some(uuid),
+                        ..
+                    }) = update
+                    {
+                        let src = update_uuid_to_file_path(&src_update_path, uuid);
+                        let dst = update_uuid_to_file_path(&dst_update_path, uuid);
+                        std::fs::copy(src, dst)?;
+                    }
+                }
+                _ => break,
+            }
+
+            line.clear();
+        }
+
+        wtxn.commit()?;
+
+        Ok(())
+    }
+}
+
+async fn dump_indexes(
+    uuids: &HashSet<Uuid>,
+    handle: impl IndexActorHandle,
+    path: impl AsRef<Path>,
+) -> anyhow::Result<()> {
+    for uuid in uuids {
+        handle.dump(*uuid, path.as_ref().to_owned()).await?;
+    }
+
+    Ok(())
+}

meilisearch-http/src/index_controller/update_actor/store/mod.rs

@@ -1,36 +1,35 @@
-use std::collections::{BTreeMap, HashSet};
+mod codec;
-use std::convert::TryInto;
+pub mod dump;
+
 use std::fs::{copy, create_dir_all, remove_file, File};
-use std::mem::size_of;
 use std::path::Path;
 use std::sync::Arc;
-use std::{borrow::Cow, path::PathBuf};
+use std::{
+    collections::{BTreeMap, HashSet},
+    path::PathBuf,
+};
 
-use anyhow::Context;
 use arc_swap::ArcSwap;
 use futures::StreamExt;
 use heed::types::{ByteSlice, OwnedType, SerdeJson};
 use heed::zerocopy::U64;
-use heed::{BytesDecode, BytesEncode, CompactionOption, Database, Env, EnvOpenOptions};
+use heed::{CompactionOption, Database, Env, EnvOpenOptions};
 use log::error;
 use parking_lot::{Mutex, MutexGuard};
 use tokio::runtime::Handle;
 use tokio::sync::mpsc;
 use uuid::Uuid;
 
+use codec::*;
+
 use super::UpdateMeta;
-use crate::{helpers::EnvSizer, index_controller::index_actor::IndexResult};
 use crate::index_controller::{index_actor::CONCURRENT_INDEX_MSG, updates::*, IndexActorHandle};
+use crate::{helpers::EnvSizer, index_controller::index_actor::IndexResult};
 
 #[allow(clippy::upper_case_acronyms)]
 type BEU64 = U64<heed::byteorder::BE>;
 
-struct NextIdCodec;
+const UPDATE_DIR: &str = "update_files";
-
-enum NextIdKey {
-    Global,
-    Index(Uuid),
-}
 
 pub struct UpdateStoreInfo {
     /// Size of the update store in bytes.
@@ -45,13 +44,13 @@ pub struct StateLock {
     data: ArcSwap<State>,
 }
 
-struct StateLockGuard<'a> {
+pub struct StateLockGuard<'a> {
     _lock: MutexGuard<'a, ()>,
     state: &'a StateLock,
 }
 
 impl StateLockGuard<'_> {
-    fn swap(&self, state: State) -> Arc<State> {
+    pub fn swap(&self, state: State) -> Arc<State> {
         self.state.data.swap(Arc::new(state))
     }
 }
@@ -63,11 +62,11 @@ impl StateLock {
         Self { lock, data }
     }
 
-    fn read(&self) -> Arc<State> {
+    pub fn read(&self) -> Arc<State> {
         self.data.load().clone()
     }
 
-    fn write(&self) -> StateLockGuard {
+    pub fn write(&self) -> StateLockGuard {
         let _lock = self.lock.lock();
         let state = &self;
         StateLockGuard { _lock, state }
@@ -82,81 +81,6 @@ pub enum State {
     Dumping,
 }
 
-impl<'a> BytesEncode<'a> for NextIdCodec {
-    type EItem = NextIdKey;
-
-    fn bytes_encode(item: &'a Self::EItem) -> Option<Cow<'a, [u8]>> {
-        match item {
-            NextIdKey::Global => Some(Cow::Borrowed(b"__global__")),
-            NextIdKey::Index(ref uuid) => Some(Cow::Borrowed(uuid.as_bytes())),
-        }
-    }
-}
-
-struct PendingKeyCodec;
-
-impl<'a> BytesEncode<'a> for PendingKeyCodec {
-    type EItem = (u64, Uuid, u64);
-
-    fn bytes_encode((global_id, uuid, update_id): &'a Self::EItem) -> Option<Cow<'a, [u8]>> {
-        let mut bytes = Vec::with_capacity(size_of::<Self::EItem>());
-        bytes.extend_from_slice(&global_id.to_be_bytes());
-        bytes.extend_from_slice(uuid.as_bytes());
-        bytes.extend_from_slice(&update_id.to_be_bytes());
-        Some(Cow::Owned(bytes))
-    }
-}
-
-impl<'a> BytesDecode<'a> for PendingKeyCodec {
-    type DItem = (u64, Uuid, u64);
-
-    fn bytes_decode(bytes: &'a [u8]) -> Option<Self::DItem> {
-        let global_id_bytes = bytes.get(0..size_of::<u64>())?.try_into().ok()?;
-        let global_id = u64::from_be_bytes(global_id_bytes);
-
-        let uuid_bytes = bytes
-            .get(size_of::<u64>()..(size_of::<u64>() + size_of::<Uuid>()))?
-            .try_into()
-            .ok()?;
-        let uuid = Uuid::from_bytes(uuid_bytes);
-
-        let update_id_bytes = bytes
-            .get((size_of::<u64>() + size_of::<Uuid>())..)?
-            .try_into()
-            .ok()?;
-        let update_id = u64::from_be_bytes(update_id_bytes);
-
-        Some((global_id, uuid, update_id))
-    }
-}
-
-struct UpdateKeyCodec;
-
-impl<'a> BytesEncode<'a> for UpdateKeyCodec {
-    type EItem = (Uuid, u64);
-
-    fn bytes_encode((uuid, update_id): &'a Self::EItem) -> Option<Cow<'a, [u8]>> {
-        let mut bytes = Vec::with_capacity(size_of::<Self::EItem>());
-        bytes.extend_from_slice(uuid.as_bytes());
-        bytes.extend_from_slice(&update_id.to_be_bytes());
-        Some(Cow::Owned(bytes))
-    }
-}
-
-impl<'a> BytesDecode<'a> for UpdateKeyCodec {
-    type DItem = (Uuid, u64);
-
-    fn bytes_decode(bytes: &'a [u8]) -> Option<Self::DItem> {
-        let uuid_bytes = bytes.get(0..size_of::<Uuid>())?.try_into().ok()?;
-        let uuid = Uuid::from_bytes(uuid_bytes);
-
-        let update_id_bytes = bytes.get(size_of::<Uuid>()..)?.try_into().ok()?;
-        let update_id = u64::from_be_bytes(update_id_bytes);
-
-        Some((uuid, update_id))
-    }
-}
-
 #[derive(Clone)]
 pub struct UpdateStore {
     pub env: Env,
@@ -174,19 +98,20 @@ pub struct UpdateStore {
     /// | 16-bytes | 8-bytes |
     updates: Database<ByteSlice, SerdeJson<UpdateStatus>>,
     /// Indicates the current state of the update store,
-    state: Arc<StateLock>,
+    pub state: Arc<StateLock>,
     /// Wake up the loop when a new event occurs.
     notification_sender: mpsc::Sender<()>,
+    path: PathBuf,
 }
 
 impl UpdateStore {
-    pub fn create(
+    fn new(
         mut options: EnvOpenOptions,
         path: impl AsRef<Path>,
     ) -> anyhow::Result<(Self, mpsc::Receiver<()>)> {
         options.max_dbs(5);
 
-        let env = options.open(path)?;
+        let env = options.open(&path)?;
         let pending_queue = env.create_database(Some("pending-queue"))?;
         let next_update_id = env.create_database(Some("next-update-id"))?;
         let updates = env.create_database(Some("updates"))?;
@@ -194,8 +119,6 @@ impl UpdateStore {
         let state = Arc::new(StateLock::from_state(State::Idle));
 
         let (notification_sender, notification_receiver) = mpsc::channel(10);
-        // Send a first notification to trigger the process.
-        let _ = notification_sender.send(());
 
         Ok((
             Self {
@@ -205,6 +128,7 @@ impl UpdateStore {
                 updates,
                 state,
                 notification_sender,
+                path: path.as_ref().to_owned(),
             },
             notification_receiver,
         ))
@@ -215,9 +139,12 @@ impl UpdateStore {
         path: impl AsRef<Path>,
         index_handle: impl IndexActorHandle + Clone + Sync + Send + 'static,
     ) -> anyhow::Result<Arc<Self>> {
-        let (update_store, mut notification_receiver) = Self::create(options, path)?;
+        let (update_store, mut notification_receiver) = Self::new(options, path)?;
         let update_store = Arc::new(update_store);
 
+        // Send a first notification to trigger the process.
+        let _ = update_store.notification_sender.send(());
+
         // Init update loop to perform any pending updates at launch.
         // Since we just launched the update store, and we still own the receiving end of the
         // channel, this call is guaranteed to succeed.
@@ -296,13 +223,13 @@ impl UpdateStore {
     pub fn register_update(
         &self,
         meta: UpdateMeta,
-        content: Option<impl AsRef<Path>>,
+        content: Option<Uuid>,
         index_uuid: Uuid,
     ) -> heed::Result<Enqueued> {
         let mut txn = self.env.write_txn()?;
 
         let (global_id, update_id) = self.next_update_id(&mut txn, index_uuid)?;
-        let meta = Enqueued::new(meta, update_id, content.map(|p| p.as_ref().to_owned()));
+        let meta = Enqueued::new(meta, update_id, content);
 
         self.pending_queue
             .put(&mut txn, &(global_id, index_uuid, update_id), &meta)?;
@@ -320,7 +247,7 @@ impl UpdateStore {
     pub fn register_raw_updates(
         &self,
         wtxn: &mut heed::RwTxn,
-        update: UpdateStatus,
+        update: &UpdateStatus,
         index_uuid: Uuid,
     ) -> heed::Result<()> {
         match update {
@@ -364,13 +291,14 @@ impl UpdateStore {
                 let processing = pending.processing();
 
                 // Acquire the state lock and set the current state to processing.
+                // txn must *always* be acquired after state lock, or it will dead lock.
                 let state = self.state.write();
                 state.swap(State::Processing(index_uuid, processing.clone()));
 
                 let file = match content_path {
-                    Some(ref path) => {
+                    Some(uuid) => {
-                        let file = File::open(path)
+                        let path = update_uuid_to_file_path(&self.path, uuid);
-                            .with_context(|| format!("file at path: {:?}", &content_path))?;
+                        let file = File::open(path)?;
                         Some(file)
                     }
                     None => None,
@@ -386,7 +314,8 @@ impl UpdateStore {
                 self.pending_queue
                     .delete(&mut wtxn, &(global_id, index_uuid, update_id))?;
 
-                if let Some(path) = content_path {
+                if let Some(uuid) = content_path {
+                    let path = update_uuid_to_file_path(&self.path, uuid);
                     remove_file(&path)?;
                 }
 
@@ -486,7 +415,7 @@ impl UpdateStore {
     pub fn delete_all(&self, index_uuid: Uuid) -> anyhow::Result<()> {
         let mut txn = self.env.write_txn()?;
         // Contains all the content file paths that we need to be removed if the deletion was successful.
-        let mut paths_to_remove = Vec::new();
+        let mut uuids_to_remove = Vec::new();
 
         let mut pendings = self.pending_queue.iter_mut(&mut txn)?.lazily_decode_data();
 
@@ -494,8 +423,8 @@ impl UpdateStore {
             if uuid == index_uuid {
                 pendings.del_current()?;
                 let mut pending = pending.decode()?;
-                if let Some(path) = pending.content.take() {
+                if let Some(update_uuid) = pending.content.take() {
-                    paths_to_remove.push(path);
+                    uuids_to_remove.push(update_uuid);
                 }
             }
         }
@@ -515,7 +444,10 @@ impl UpdateStore {
 
         txn.commit()?;
 
-        paths_to_remove.iter().for_each(|path| {
+        uuids_to_remove
+            .iter()
+            .map(|uuid| update_uuid_to_file_path(&self.path, *uuid))
+            .for_each(|path| {
                 let _ = remove_file(path);
             });
 
@@ -546,7 +478,7 @@ impl UpdateStore {
         // create db snapshot
         self.env.copy_to_path(&db_path, CompactionOption::Enabled)?;
 
-        let update_files_path = update_path.join("update_files");
+        let update_files_path = update_path.join(UPDATE_DIR);
         create_dir_all(&update_files_path)?;
 
         let pendings = self.pending_queue.iter(&txn)?.lazily_decode_data();
@@ -554,10 +486,13 @@ impl UpdateStore {
         for entry in pendings {
             let ((_, uuid, _), pending) = entry?;
             if uuids.contains(&uuid) {
-                if let Some(path) = pending.decode()?.content_path() {
+                if let Enqueued {
-                    let name = path.file_name().unwrap();
+                    content: Some(uuid),
-                    let to = update_files_path.join(name);
+                    ..
-                    copy(path, to)?;
+                } = pending.decode()?
+                {
+                    let path = update_uuid_to_file_path(&self.path, uuid);
+                    copy(path, &update_files_path)?;
                 }
             }
         }
@@ -580,85 +515,17 @@ impl UpdateStore {
         Ok(())
     }
 
-    pub fn dump(
-        &self,
-        uuids: &HashSet<(String, Uuid)>,
-        path: PathBuf,
-        handle: impl IndexActorHandle,
-    ) -> anyhow::Result<()> {
-        use std::io::prelude::*;
-        let state_lock = self.state.write();
-        state_lock.swap(State::Dumping);
-
-        let txn = self.env.write_txn()?;
-
-        for (index_uid, index_uuid) in uuids.iter() {
-            let file = File::create(path.join(index_uid).join("updates.jsonl"))?;
-            let mut file = std::io::BufWriter::new(file);
-
-            let pendings = self.pending_queue.iter(&txn)?.lazily_decode_data();
-            for entry in pendings {
-                let ((_, uuid, _), pending) = entry?;
-                if &uuid == index_uuid {
-                    let mut update: UpdateStatus = pending.decode()?.into();
-                    if let Some(path) = update.content_path_mut() {
-                        *path = path.file_name().expect("update path can't be empty").into();
-                    }
-                    serde_json::to_writer(&mut file, &update)?;
-                    file.write_all(b"\n")?;
-                }
-            }
-
-            let updates = self.updates.prefix_iter(&txn, index_uuid.as_bytes())?;
-            for entry in updates {
-                let (_, update) = entry?;
-                let mut update = update.clone();
-                if let Some(path) = update.content_path_mut() {
-                    *path = path.file_name().expect("update path can't be empty").into();
-                }
-                serde_json::to_writer(&mut file, &update)?;
-                file.write_all(b"\n")?;
-            }
-        }
-
-        let update_files_path = path.join("update_files");
-        create_dir_all(&update_files_path)?;
-
-        let pendings = self.pending_queue.iter(&txn)?.lazily_decode_data();
-
-        for entry in pendings {
-            let ((_, uuid, _), pending) = entry?;
-            if uuids.iter().any(|(_, id)| id == &uuid) {
-                if let Some(path) = pending.decode()?.content_path() {
-                    let name = path.file_name().unwrap();
-                    let to = update_files_path.join(name);
-                    copy(path, to)?;
-                }
-            }
-        }
-
-        // Perform the dump of each index concurently. Only a third of the capabilities of
-        // the index actor at a time not to put too much pressure on the index actor
-        let path = &path;
-
-        let mut stream = futures::stream::iter(uuids.iter())
-            .map(|(uid, uuid)| handle.dump(uid.clone(), *uuid, path.clone()))
-            .buffer_unordered(CONCURRENT_INDEX_MSG / 3);
-
-        Handle::current().block_on(async {
-            while let Some(res) = stream.next().await {
-                res?;
-            }
-            Ok(())
-        })
-    }
-
     pub fn get_info(&self) -> anyhow::Result<UpdateStoreInfo> {
         let mut size = self.env.size();
         let txn = self.env.read_txn()?;
         for entry in self.pending_queue.iter(&txn)? {
             let (_, pending) = entry?;
-            if let Some(path) = pending.content_path() {
+            if let Enqueued {
+                content: Some(uuid),
+                ..
+            } = pending
+            {
+                let path = update_uuid_to_file_path(&self.path, uuid);
                 size += File::open(path)?.metadata()?.len();
             }
         }
@@ -671,6 +538,12 @@ impl UpdateStore {
     }
 }
 
+fn update_uuid_to_file_path(root: impl AsRef<Path>, uuid: Uuid) -> PathBuf {
+    root.as_ref()
+        .join(UPDATE_DIR)
+        .join(format!("update_{}", uuid))
+}
+
 #[cfg(test)]
 mod test {
     use super::*;
@@ -716,9 +589,7 @@ mod test {
         let uuid = Uuid::new_v4();
         let store_clone = update_store.clone();
         tokio::task::spawn_blocking(move || {
-            store_clone
+            store_clone.register_update(meta, None, uuid).unwrap();
-                .register_update(meta, Some("here"), uuid)
-                .unwrap();
         })
         .await
         .unwrap();

meilisearch-http/src/index_controller/updates.rs

@@ -1,8 +1,7 @@
-use std::path::{Path, PathBuf};
-
 use chrono::{DateTime, Utc};
 use milli::update::{DocumentAdditionResult, IndexDocumentsMethod, UpdateFormat};
 use serde::{Deserialize, Serialize};
+use uuid::Uuid;
 
 use crate::index::{Checked, Settings};
 
@@ -34,11 +33,11 @@ pub struct Enqueued {
     pub update_id: u64,
     pub meta: UpdateMeta,
     pub enqueued_at: DateTime<Utc>,
-    pub content: Option<PathBuf>,
+    pub content: Option<Uuid>,
 }
 
 impl Enqueued {
-    pub fn new(meta: UpdateMeta, update_id: u64, content: Option<PathBuf>) -> Self {
+    pub fn new(meta: UpdateMeta, update_id: u64, content: Option<Uuid>) -> Self {
         Self {
             enqueued_at: Utc::now(),
             meta,
@@ -68,14 +67,6 @@ impl Enqueued {
     pub fn id(&self) -> u64 {
         self.update_id
     }
-
-    pub fn content_path(&self) -> Option<&Path> {
-        self.content.as_deref()
-    }
-
-    pub fn content_path_mut(&mut self) -> Option<&mut PathBuf> {
-        self.content.as_mut()
-    }
 }
 
 #[derive(Debug, Serialize, Deserialize, Clone)]
@@ -91,14 +82,6 @@ impl Processed {
     pub fn id(&self) -> u64 {
         self.from.id()
     }
-
-    pub fn content_path(&self) -> Option<&Path> {
-        self.from.content_path()
-    }
-
-    pub fn content_path_mut(&mut self) -> Option<&mut PathBuf> {
-        self.from.content_path_mut()
-    }
 }
 
 #[derive(Debug, Serialize, Deserialize, Clone)]
@@ -118,14 +101,6 @@ impl Processing {
         self.from.meta()
     }
 
-    pub fn content_path(&self) -> Option<&Path> {
-        self.from.content_path()
-    }
-
-    pub fn content_path_mut(&mut self) -> Option<&mut PathBuf> {
-        self.from.content_path_mut()
-    }
-
     pub fn process(self, success: UpdateResult) -> Processed {
         Processed {
             success,
@@ -155,14 +130,6 @@ impl Aborted {
     pub fn id(&self) -> u64 {
         self.from.id()
     }
-
-    pub fn content_path(&self) -> Option<&Path> {
-        self.from.content_path()
-    }
-
-    pub fn content_path_mut(&mut self) -> Option<&mut PathBuf> {
-        self.from.content_path_mut()
-    }
 }
 
 #[derive(Debug, Serialize, Deserialize, Clone)]
@@ -178,14 +145,6 @@ impl Failed {
     pub fn id(&self) -> u64 {
         self.from.id()
     }
-
-    pub fn content_path(&self) -> Option<&Path> {
-        self.from.content_path()
-    }
-
-    pub fn content_path_mut(&mut self) -> Option<&mut PathBuf> {
-        self.from.content_path_mut()
-    }
 }
 
 #[derive(Debug, Serialize, Deserialize, Clone)]
@@ -215,26 +174,6 @@ impl UpdateStatus {
             _ => None,
         }
     }
-
-    pub fn content_path(&self) -> Option<&Path> {
-        match self {
-            UpdateStatus::Processing(u) => u.content_path(),
-            UpdateStatus::Processed(u) => u.content_path(),
-            UpdateStatus::Aborted(u) => u.content_path(),
-            UpdateStatus::Failed(u) => u.content_path(),
-            UpdateStatus::Enqueued(u) => u.content_path(),
-        }
-    }
-
-    pub fn content_path_mut(&mut self) -> Option<&mut PathBuf> {
-        match self {
-            UpdateStatus::Processing(u) => u.content_path_mut(),
-            UpdateStatus::Processed(u) => u.content_path_mut(),
-            UpdateStatus::Aborted(u) => u.content_path_mut(),
-            UpdateStatus::Failed(u) => u.content_path_mut(),
-            UpdateStatus::Enqueued(u) => u.content_path_mut(),
-        }
-    }
 }
 
 impl From<Enqueued> for UpdateStatus {

meilisearch-http/src/index_controller/uuid_resolver/actor.rs

@@ -4,7 +4,7 @@ use log::{info, warn};
 use tokio::sync::mpsc;
 use uuid::Uuid;
 
-use super::{Result, UuidError, UuidResolveMsg, UuidStore};
+use super::{Result, UuidResolveMsg, UuidResolverError, UuidStore};
 
 pub struct UuidResolverActor<S> {
     inbox: mpsc::Receiver<UuidResolveMsg>,
@@ -44,6 +44,9 @@ impl<S: UuidStore> UuidResolverActor<S> {
                 Some(GetSize { ret }) => {
                     let _ = ret.send(self.handle_get_size().await);
                 }
+                Some(DumpRequest { path, ret }) => {
+                    let _ = ret.send(self.handle_dump(path).await);
+                }
                 // all senders have been dropped, need to quit.
                 None => break,
             }
@@ -54,7 +57,7 @@ impl<S: UuidStore> UuidResolverActor<S> {
 
     async fn handle_create(&self, uid: String) -> Result<Uuid> {
         if !is_index_uid_valid(&uid) {
-            return Err(UuidError::BadlyFormatted(uid));
+            return Err(UuidResolverError::BadlyFormatted(uid));
         }
         self.store.create_uuid(uid, true).await
     }
@@ -63,14 +66,14 @@ impl<S: UuidStore> UuidResolverActor<S> {
         self.store
             .get_uuid(uid.clone())
             .await?
-            .ok_or(UuidError::UnexistingIndex(uid))
+            .ok_or(UuidResolverError::UnexistingIndex(uid))
     }
 
     async fn handle_delete(&self, uid: String) -> Result<Uuid> {
         self.store
             .delete(uid.clone())
             .await?
-            .ok_or(UuidError::UnexistingIndex(uid))
+            .ok_or(UuidResolverError::UnexistingIndex(uid))
     }
 
     async fn handle_list(&self) -> Result<Vec<(String, Uuid)>> {
@@ -82,9 +85,13 @@ impl<S: UuidStore> UuidResolverActor<S> {
         self.store.snapshot(path).await
     }
 
+    async fn handle_dump(&self, path: PathBuf) -> Result<HashSet<Uuid>> {
+        self.store.dump(path).await
+    }
+
     async fn handle_insert(&self, uid: String, uuid: Uuid) -> Result<()> {
         if !is_index_uid_valid(&uid) {
-            return Err(UuidError::BadlyFormatted(uid));
+            return Err(UuidResolverError::BadlyFormatted(uid));
         }
         self.store.insert(uid, uuid).await?;
         Ok(())

meilisearch-http/src/index_controller/uuid_resolver/handle_impl.rs

@@ -85,4 +85,12 @@ impl UuidResolverHandle for UuidResolverHandleImpl {
             .await
             .expect("Uuid resolver actor has been killed")?)
     }
+    async fn dump(&self, path: PathBuf) -> Result<HashSet<Uuid>> {
+        let (ret, receiver) = oneshot::channel();
+        let msg = UuidResolveMsg::DumpRequest { ret, path };
+        let _ = self.sender.send(msg).await;
+        Ok(receiver
+            .await
+            .expect("Uuid resolver actor has been killed")?)
+    }
 }

meilisearch-http/src/index_controller/uuid_resolver/message.rs

@@ -34,4 +34,8 @@ pub enum UuidResolveMsg {
     GetSize {
         ret: oneshot::Sender<Result<u64>>,
     },
+    DumpRequest {
+        path: PathBuf,
+        ret: oneshot::Sender<Result<HashSet<Uuid>>>,
+    },
 }

meilisearch-http/src/index_controller/uuid_resolver/mod.rs

@@ -1,7 +1,7 @@
 mod actor;
 mod handle_impl;
 mod message;
-mod store;
+pub mod store;
 
 use std::collections::HashSet;
 use std::path::PathBuf;
@@ -16,12 +16,12 @@ use store::UuidStore;
 #[cfg(test)]
 use mockall::automock;
 
-pub use store::HeedUuidStore;
 pub use handle_impl::UuidResolverHandleImpl;
+pub use store::HeedUuidStore;
 
 const UUID_STORE_SIZE: usize = 1_073_741_824; //1GiB
 
-pub type Result<T> = std::result::Result<T, UuidError>;
+pub type Result<T> = std::result::Result<T, UuidResolverError>;
 
 #[async_trait::async_trait]
 #[cfg_attr(test, automock)]
@@ -33,20 +33,37 @@ pub trait UuidResolverHandle {
     async fn list(&self) -> anyhow::Result<Vec<(String, Uuid)>>;
     async fn snapshot(&self, path: PathBuf) -> Result<HashSet<Uuid>>;
     async fn get_size(&self) -> Result<u64>;
+    async fn dump(&self, path: PathBuf) -> Result<HashSet<Uuid>>;
 }
 
 #[derive(Debug, Error)]
-pub enum UuidError {
+pub enum UuidResolverError {
     #[error("Name already exist.")]
     NameAlreadyExist,
     #[error("Index \"{0}\" doesn't exist.")]
     UnexistingIndex(String),
-    #[error("Error performing task: {0}")]
-    TokioTask(#[from] tokio::task::JoinError),
-    #[error("Database error: {0}")]
-    Heed(#[from] heed::Error),
-    #[error("Uuid error: {0}")]
-    Uuid(#[from] uuid::Error),
     #[error("Badly formatted index uid: {0}")]
     BadlyFormatted(String),
+    #[error("Internal error resolving index uid: {0}")]
+    Internal(String),
 }
+
+macro_rules! internal_error {
+    ($($other:path), *) => {
+        $(
+            impl From<$other> for UuidResolverError {
+                fn from(other: $other) -> Self {
+                    Self::Internal(other.to_string())
+                }
+            }
+        )*
+    }
+}
+
+internal_error!(
+    heed::Error,
+    uuid::Error,
+    std::io::Error,
+    tokio::task::JoinError,
+    serde_json::Error
+);

meilisearch-http/src/index_controller/uuid_resolver/store.rs

@@ -1,18 +1,26 @@
 use std::collections::HashSet;
-use std::fs::create_dir_all;
+use std::fs::{create_dir_all, File};
+use std::io::{BufRead, BufReader, Write};
 use std::path::{Path, PathBuf};
 
-use heed::{
+use heed::types::{ByteSlice, Str};
-    types::{ByteSlice, Str},
+use heed::{CompactionOption, Database, Env, EnvOpenOptions};
-    CompactionOption, Database, Env, EnvOpenOptions,
+use serde::{Deserialize, Serialize};
-};
 use uuid::Uuid;
 
-use super::{Result, UuidError, UUID_STORE_SIZE};
+use super::{Result, UuidResolverError, UUID_STORE_SIZE};
 use crate::helpers::EnvSizer;
 
+#[derive(Serialize, Deserialize)]
+struct DumpEntry {
+    uuid: Uuid,
+    uid: String,
+}
+
+const UUIDS_DB_PATH: &str = "index_uuids";
+
 #[async_trait::async_trait]
-pub trait UuidStore {
+pub trait UuidStore: Sized {
     // Create a new entry for `name`. Return an error if `err` and the entry already exists, return
     // the uuid otherwise.
     async fn create_uuid(&self, uid: String, err: bool) -> Result<Uuid>;
@@ -22,6 +30,7 @@ pub trait UuidStore {
     async fn insert(&self, name: String, uuid: Uuid) -> Result<()>;
     async fn snapshot(&self, path: PathBuf) -> Result<HashSet<Uuid>>;
     async fn get_size(&self) -> Result<u64>;
+    async fn dump(&self, path: PathBuf) -> Result<HashSet<Uuid>>;
 }
 
 #[derive(Clone)]
@@ -32,7 +41,7 @@ pub struct HeedUuidStore {
 
 impl HeedUuidStore {
     pub fn new(path: impl AsRef<Path>) -> anyhow::Result<Self> {
-        let path = path.as_ref().join("index_uuids");
+        let path = path.as_ref().join(UUIDS_DB_PATH);
         create_dir_all(&path)?;
         let mut options = EnvOpenOptions::new();
         options.map_size(UUID_STORE_SIZE); // 1GB
@@ -48,7 +57,7 @@ impl HeedUuidStore {
         match db.get(&txn, &name)? {
             Some(uuid) => {
                 if err {
-                    Err(UuidError::NameAlreadyExist)
+                    Err(UuidResolverError::NameAlreadyExist)
                 } else {
                     let uuid = Uuid::from_slice(uuid)?;
                     Ok(uuid)
@@ -62,7 +71,6 @@ impl HeedUuidStore {
             }
         }
     }
-
     pub fn get_uuid(&self, name: String) -> Result<Option<Uuid>> {
         let env = self.env.clone();
         let db = self.db;
@@ -127,7 +135,7 @@ impl HeedUuidStore {
 
         // only perform snapshot if there are indexes
         if !entries.is_empty() {
-            path.push("index_uuids");
+            path.push(UUIDS_DB_PATH);
             create_dir_all(&path).unwrap();
             path.push("data.mdb");
             env.copy_to_path(path, CompactionOption::Enabled)?;
@@ -138,6 +146,61 @@ impl HeedUuidStore {
     pub fn get_size(&self) -> Result<u64> {
         Ok(self.env.size())
     }
+
+    pub fn dump(&self, path: PathBuf) -> Result<HashSet<Uuid>> {
+        let dump_path = path.join(UUIDS_DB_PATH);
+        create_dir_all(&dump_path)?;
+        let dump_file_path = dump_path.join("data.jsonl");
+        let mut dump_file = File::create(&dump_file_path)?;
+        let mut uuids = HashSet::new();
+
+        let txn = self.env.read_txn()?;
+        for entry in self.db.iter(&txn)? {
+            let (uid, uuid) = entry?;
+            let uid = uid.to_string();
+            let uuid = Uuid::from_slice(uuid)?;
+
+            let entry = DumpEntry { uuid, uid };
+            serde_json::to_writer(&mut dump_file, &entry)?;
+            dump_file.write_all(b"\n").unwrap();
+
+            uuids.insert(uuid);
+        }
+
+        Ok(uuids)
+    }
+
+    pub fn load_dump(src: impl AsRef<Path>, dst: impl AsRef<Path>) -> anyhow::Result<()> {
+        let uuid_resolver_path = dst.as_ref().join(UUIDS_DB_PATH);
+        std::fs::create_dir_all(&uuid_resolver_path)?;
+
+        let src_indexes = src.as_ref().join(UUIDS_DB_PATH).join("data.jsonl");
+        let indexes = File::open(&src_indexes)?;
+        let mut indexes = BufReader::new(indexes);
+        let mut line = String::new();
+
+        let db = Self::new(dst)?;
+        let mut txn = db.env.write_txn()?;
+
+        loop {
+            match indexes.read_line(&mut line) {
+                Ok(0) => break,
+                Ok(_) => {
+                    let DumpEntry { uuid, uid } = serde_json::from_str(&line)?;
+                    println!("importing {} {}", uid, uuid);
+                    db.db.put(&mut txn, &uid, uuid.as_bytes())?;
+                }
+                Err(e) => return Err(e.into()),
+            }
+
+            line.clear();
+        }
+        txn.commit()?;
+
+        db.env.prepare_for_closing().wait();
+
+        Ok(())
+    }
 }
 
 #[async_trait::async_trait]
@@ -175,4 +238,9 @@ impl UuidStore for HeedUuidStore {
     async fn get_size(&self) -> Result<u64> {
         self.get_size()
     }
+
+    async fn dump(&self, path: PathBuf) -> Result<HashSet<Uuid>> {
+        let this = self.clone();
+        tokio::task::spawn_blocking(move || this.dump(path)).await?
+    }
 }

meilisearch-http/src/lib.rs

@@ -66,7 +66,7 @@ macro_rules! create_app {
                 .allowed_headers(vec!["content-type", "x-meili-api-key"])
                 .allow_any_origin()
                 .allow_any_method()
-            .max_age(86_400) // 24h
+                .max_age(86_400), // 24h
         )
         .wrap(middleware::Logger::default())
         .wrap(middleware::Compress::default())

meilisearch-http/src/routes/dump.rs

@@ -1,20 +1,17 @@
-use actix_web::{post, get, web};
 use actix_web::HttpResponse;
-use serde::{Serialize, Deserialize};
+use actix_web::{get, post, web};
+use serde::{Deserialize, Serialize};
 
 use crate::error::ResponseError;
 use crate::helpers::Authentication;
 use crate::Data;
 
 pub fn services(cfg: &mut web::ServiceConfig) {
-    cfg.service(create_dump)
+    cfg.service(create_dump).service(get_dump_status);
-        .service(get_dump_status);
 }
 
 #[post("/dumps", wrap = "Authentication::Private")]
-async fn create_dump(
+async fn create_dump(data: web::Data<Data>) -> Result<HttpResponse, ResponseError> {
-    data: web::Data<Data>,
-) -> Result<HttpResponse, ResponseError> {
     let res = data.create_dump().await?;
 
     Ok(HttpResponse::Accepted().json(res))

meilisearch-http/src/routes/index.rs

@@ -1,7 +1,7 @@
 use actix_web::{delete, get, post, put};
 use actix_web::{web, HttpResponse};
 use chrono::{DateTime, Utc};
-use serde::{Serialize, Deserialize};
+use serde::{Deserialize, Serialize};
 
 use crate::error::ResponseError;
 use crate::helpers::Authentication;

meilisearch-http/src/routes/mod.rs

@@ -2,6 +2,7 @@ use actix_web::{get, HttpResponse};
 use serde::{Deserialize, Serialize};
 
 pub mod document;
+pub mod dump;
 pub mod health;
 pub mod index;
 pub mod key;
@@ -9,7 +10,6 @@ pub mod search;
 pub mod settings;
 pub mod stats;
 pub mod synonym;
-pub mod dump;
 
 #[derive(Deserialize)]
 pub struct IndexParam {

meilisearch-http/src/routes/settings/mod.rs

@@ -1,9 +1,9 @@
 use actix_web::{delete, get, post, web, HttpResponse};
 
-use crate::{error::ResponseError, index::Unchecked};
 use crate::helpers::Authentication;
 use crate::index::Settings;
 use crate::Data;
+use crate::{error::ResponseError, index::Unchecked};
 
 #[macro_export]
 macro_rules! make_setting_route {