fix the missing batch in the dumps in meilisearch and meilitools

crates/dump/README.md

@@ -10,8 +10,10 @@ dump
 ├── instance-uid.uuid
 ├── keys.jsonl
 ├── metadata.json
-└── tasks
-    ├── update_files
-    │   └── [task_id].jsonl
+├── tasks
+│   ├── update_files
+│   │   └── [task_id].jsonl
+│   └── queue.jsonl
+└── batches
     └── queue.jsonl
 ```

crates/dump/src/lib.rs

@@ -228,6 +228,7 @@ pub(crate) mod test {
 
     use big_s::S;
     use maplit::{btreemap, btreeset};
+    use meilisearch_types::batches::{Batch, BatchEnqueuedAt, BatchStats};
     use meilisearch_types::facet_values_sort::FacetValuesSort;
     use meilisearch_types::features::{Network, Remote, RuntimeTogglableFeatures};
     use meilisearch_types::index_uid_pattern::IndexUidPattern;
@@ -235,7 +236,8 @@ pub(crate) mod test {
     use meilisearch_types::milli;
     use meilisearch_types::milli::update::Setting;
     use meilisearch_types::settings::{Checked, FacetingSettings, Settings};
-    use meilisearch_types::tasks::{Details, Status};
+    use meilisearch_types::task_view::DetailsView;
+    use meilisearch_types::tasks::{Details, Kind, Status};
     use serde_json::{json, Map, Value};
     use time::macros::datetime;
     use uuid::Uuid;
@@ -305,6 +307,30 @@ pub(crate) mod test {
         settings.check()
     }
 
+    pub fn create_test_batches() -> Vec<Batch> {
+        vec![Batch {
+            uid: 0,
+            details: DetailsView {
+                received_documents: Some(12),
+                indexed_documents: Some(Some(10)),
+                ..DetailsView::default()
+            },
+            progress: None,
+            stats: BatchStats {
+                total_nb_tasks: 1,
+                status: maplit::btreemap! { Status::Succeeded => 1 },
+                types: maplit::btreemap! { Kind::DocumentAdditionOrUpdate => 1 },
+                index_uids: maplit::btreemap! { "doggo".to_string() => 1 },
+            },
+            enqueued_at: Some(BatchEnqueuedAt {
+                earliest: datetime!(2022-11-11 0:00 UTC),
+                oldest: datetime!(2022-11-11 0:00 UTC),
+            }),
+            started_at: datetime!(2022-11-20 0:00 UTC),
+            finished_at: Some(datetime!(2022-11-21 0:00 UTC)),
+        }]
+    }
+
     pub fn create_test_tasks() -> Vec<(TaskDump, Option<Vec<Document>>)> {
         vec![
             (
@@ -427,6 +453,15 @@ pub(crate) mod test {
         index.flush().unwrap();
         index.settings(&settings).unwrap();
 
+        // ========== pushing the batch queue
+        let batches = create_test_batches();
+
+        let mut batch_queue = dump.create_batches_queue().unwrap();
+        for batch in &batches {
+            batch_queue.push_batch(batch).unwrap();
+        }
+        batch_queue.flush().unwrap();
+
         // ========== pushing the task queue
         let tasks = create_test_tasks();
 

crates/dump/src/reader/mod.rs

@@ -102,6 +102,13 @@ impl DumpReader {
         }
     }
 
+    pub fn batches(&mut self) -> Result<Box<dyn Iterator<Item = Result<v6::Batch>> + '_>> {
+        match self {
+            DumpReader::Current(current) => Ok(current.batches()),
+            DumpReader::Compat(_compat) => Ok(Box::new(std::iter::empty())),
+        }
+    }
+
     pub fn keys(&mut self) -> Result<Box<dyn Iterator<Item = Result<v6::Key>> + '_>> {
         match self {
             DumpReader::Current(current) => Ok(current.keys()),
@@ -227,6 +234,10 @@ pub(crate) mod test {
         insta::assert_snapshot!(dump.date().unwrap(), @"2024-05-16 15:51:34.151044 +00:00:00");
         insta::assert_debug_snapshot!(dump.instance_uid().unwrap(), @"None");
 
+        // batches didn't exists at the time
+        let batches = dump.batches().unwrap().collect::<Result<Vec<_>>>().unwrap();
+        meili_snap::snapshot!(meili_snap::json_string!(batches), @"[]");
+
         // tasks
         let tasks = dump.tasks().unwrap().collect::<Result<Vec<_>>>().unwrap();
         let (tasks, update_files): (Vec<_>, Vec<_>) = tasks.into_iter().unzip();
@@ -348,6 +359,10 @@ pub(crate) mod test {
         insta::assert_snapshot!(dump.date().unwrap(), @"2023-07-06 7:10:27.21958 +00:00:00");
         insta::assert_debug_snapshot!(dump.instance_uid().unwrap(), @"None");
 
+        // batches didn't exists at the time
+        let batches = dump.batches().unwrap().collect::<Result<Vec<_>>>().unwrap();
+        meili_snap::snapshot!(meili_snap::json_string!(batches), @"[]");
+
         // tasks
         let tasks = dump.tasks().unwrap().collect::<Result<Vec<_>>>().unwrap();
         let (tasks, update_files): (Vec<_>, Vec<_>) = tasks.into_iter().unzip();
@@ -412,6 +427,10 @@ pub(crate) mod test {
         insta::assert_snapshot!(dump.date().unwrap(), @"2022-10-04 15:55:10.344982459 +00:00:00");
         insta::assert_snapshot!(dump.instance_uid().unwrap().unwrap(), @"9e15e977-f2ae-4761-943f-1eaf75fd736d");
 
+        // batches didn't exists at the time
+        let batches = dump.batches().unwrap().collect::<Result<Vec<_>>>().unwrap();
+        meili_snap::snapshot!(meili_snap::json_string!(batches), @"[]");
+
         // tasks
         let tasks = dump.tasks().unwrap().collect::<Result<Vec<_>>>().unwrap();
         let (tasks, update_files): (Vec<_>, Vec<_>) = tasks.into_iter().unzip();
@@ -492,6 +511,10 @@ pub(crate) mod test {
         insta::assert_snapshot!(dump.date().unwrap(), @"2022-10-06 12:53:49.131989609 +00:00:00");
         insta::assert_snapshot!(dump.instance_uid().unwrap().unwrap(), @"9e15e977-f2ae-4761-943f-1eaf75fd736d");
 
+        // batches didn't exists at the time
+        let batches = dump.batches().unwrap().collect::<Result<Vec<_>>>().unwrap();
+        meili_snap::snapshot!(meili_snap::json_string!(batches), @"[]");
+
         // tasks
         let tasks = dump.tasks().unwrap().collect::<Result<Vec<_>>>().unwrap();
         let (tasks, update_files): (Vec<_>, Vec<_>) = tasks.into_iter().unzip();
@@ -569,6 +592,10 @@ pub(crate) mod test {
         insta::assert_snapshot!(dump.date().unwrap(), @"2022-10-07 11:39:03.709153554 +00:00:00");
         assert_eq!(dump.instance_uid().unwrap(), None);
 
+        // batches didn't exists at the time
+        let batches = dump.batches().unwrap().collect::<Result<Vec<_>>>().unwrap();
+        meili_snap::snapshot!(meili_snap::json_string!(batches), @"[]");
+
         // tasks
         let tasks = dump.tasks().unwrap().collect::<Result<Vec<_>>>().unwrap();
         let (tasks, update_files): (Vec<_>, Vec<_>) = tasks.into_iter().unzip();
@@ -662,6 +689,10 @@ pub(crate) mod test {
         insta::assert_snapshot!(dump.date().unwrap(), @"2022-10-09 20:27:59.904096267 +00:00:00");
         assert_eq!(dump.instance_uid().unwrap(), None);
 
+        // batches didn't exists at the time
+        let batches = dump.batches().unwrap().collect::<Result<Vec<_>>>().unwrap();
+        meili_snap::snapshot!(meili_snap::json_string!(batches), @"[]");
+
         // tasks
         let tasks = dump.tasks().unwrap().collect::<Result<Vec<_>>>().unwrap();
         let (tasks, update_files): (Vec<_>, Vec<_>) = tasks.into_iter().unzip();
@@ -755,6 +786,10 @@ pub(crate) mod test {
         insta::assert_snapshot!(dump.date().unwrap(), @"2023-01-30 16:26:09.247261 +00:00:00");
         assert_eq!(dump.instance_uid().unwrap(), None);
 
+        // batches didn't exists at the time
+        let batches = dump.batches().unwrap().collect::<Result<Vec<_>>>().unwrap();
+        meili_snap::snapshot!(meili_snap::json_string!(batches), @"[]");
+
         // tasks
         let tasks = dump.tasks().unwrap().collect::<Result<Vec<_>>>().unwrap();
         let (tasks, update_files): (Vec<_>, Vec<_>) = tasks.into_iter().unzip();
@@ -831,6 +866,10 @@ pub(crate) mod test {
         assert_eq!(dump.date(), None);
         assert_eq!(dump.instance_uid().unwrap(), None);
 
+        // batches didn't exists at the time
+        let batches = dump.batches().unwrap().collect::<Result<Vec<_>>>().unwrap();
+        meili_snap::snapshot!(meili_snap::json_string!(batches), @"[]");
+
         // tasks
         let tasks = dump.tasks().unwrap().collect::<Result<Vec<_>>>().unwrap();
         let (tasks, update_files): (Vec<_>, Vec<_>) = tasks.into_iter().unzip();

crates/dump/src/reader/v6/mod.rs

@@ -18,6 +18,7 @@ pub type Checked = meilisearch_types::settings::Checked;
 pub type Unchecked = meilisearch_types::settings::Unchecked;
 
 pub type Task = crate::TaskDump;
+pub type Batch = meilisearch_types::batches::Batch;
 pub type Key = meilisearch_types::keys::Key;
 pub type RuntimeTogglableFeatures = meilisearch_types::features::RuntimeTogglableFeatures;
 pub type Network = meilisearch_types::features::Network;
@@ -49,6 +50,7 @@ pub struct V6Reader {
     instance_uid: Option<Uuid>,
     metadata: Metadata,
     tasks: BufReader<File>,
+    batches: Option<BufReader<File>>,
     keys: BufReader<File>,
     features: Option<RuntimeTogglableFeatures>,
     network: Option<Network>,
@@ -79,6 +81,12 @@ impl V6Reader {
         } else {
             None
         };
+        let batches = match File::open(dump.path().join("batches").join("queue.jsonl")) {
+            Ok(file) => Some(BufReader::new(file)),
+            // The batch file was only introduced during the v1.13, anything prior to that won't have batches
+            Err(err) if err.kind() == ErrorKind::NotFound => None,
+            Err(e) => return Err(e.into()),
+        };
 
         let network_file = match fs::read(dump.path().join("network.json")) {
             Ok(network_file) => Some(network_file),
@@ -101,6 +109,7 @@ impl V6Reader {
             metadata: serde_json::from_reader(&*meta_file)?,
             instance_uid,
             tasks: BufReader::new(File::open(dump.path().join("tasks").join("queue.jsonl"))?),
+            batches,
             keys: BufReader::new(File::open(dump.path().join("keys.jsonl"))?),
             features,
             network,
@@ -144,7 +153,7 @@ impl V6Reader {
         &mut self,
     ) -> Box<dyn Iterator<Item = Result<(Task, Option<Box<super::UpdateFile>>)>> + '_> {
         Box::new((&mut self.tasks).lines().map(|line| -> Result<_> {
-            let task: Task = serde_json::from_str(&line?).unwrap();
+            let task: Task = serde_json::from_str(&line?)?;
 
             let update_file_path = self
                 .dump
@@ -156,8 +165,7 @@ impl V6Reader {
             if update_file_path.exists() {
                 Ok((
                     task,
-                    Some(Box::new(UpdateFile::new(&update_file_path).unwrap())
-                        as Box<super::UpdateFile>),
+                    Some(Box::new(UpdateFile::new(&update_file_path)?) as Box<super::UpdateFile>),
                 ))
             } else {
                 Ok((task, None))
@@ -165,6 +173,16 @@ impl V6Reader {
         }))
     }
 
+    pub fn batches(&mut self) -> Box<dyn Iterator<Item = Result<Batch>> + '_> {
+        match self.batches.as_mut() {
+            Some(batches) => Box::new((batches).lines().map(|line| -> Result<_> {
+                let batch = serde_json::from_str(&line?)?;
+                Ok(batch)
+            })),
+            None => Box::new(std::iter::empty()) as Box<dyn Iterator<Item = Result<Batch>> + '_>,
+        }
+    }
+
     pub fn keys(&mut self) -> Box<dyn Iterator<Item = Result<Key>> + '_> {
         Box::new(
             (&mut self.keys).lines().map(|line| -> Result<_> { Ok(serde_json::from_str(&line?)?) }),

crates/dump/src/writer.rs

@@ -4,6 +4,7 @@ use std::path::PathBuf;
 
 use flate2::write::GzEncoder;
 use flate2::Compression;
+use meilisearch_types::batches::Batch;
 use meilisearch_types::features::{Network, RuntimeTogglableFeatures};
 use meilisearch_types::keys::Key;
 use meilisearch_types::settings::{Checked, Settings};
@@ -54,6 +55,10 @@ impl DumpWriter {
         TaskWriter::new(self.dir.path().join("tasks"))
     }
 
+    pub fn create_batches_queue(&self) -> Result<BatchWriter> {
+        BatchWriter::new(self.dir.path().join("batches"))
+    }
+
     pub fn create_experimental_features(&self, features: RuntimeTogglableFeatures) -> Result<()> {
         Ok(std::fs::write(
             self.dir.path().join("experimental-features.json"),
@@ -130,6 +135,30 @@ impl TaskWriter {
     }
 }
 
+pub struct BatchWriter {
+    queue: BufWriter<File>,
+}
+
+impl BatchWriter {
+    pub(crate) fn new(path: PathBuf) -> Result<Self> {
+        std::fs::create_dir(&path)?;
+        let queue = File::create(path.join("queue.jsonl"))?;
+        Ok(BatchWriter { queue: BufWriter::new(queue) })
+    }
+
+    /// Pushes batches in the dump.
+    pub fn push_batch(&mut self, batch: &Batch) -> Result<()> {
+        self.queue.write_all(&serde_json::to_vec(batch)?)?;
+        self.queue.write_all(b"\n")?;
+        Ok(())
+    }
+
+    pub fn flush(mut self) -> Result<()> {
+        self.queue.flush()?;
+        Ok(())
+    }
+}
+
 pub struct UpdateFile {
     path: PathBuf,
     writer: Option<BufWriter<File>>,
@@ -209,8 +238,8 @@ pub(crate) mod test {
     use super::*;
     use crate::reader::Document;
     use crate::test::{
-        create_test_api_keys, create_test_documents, create_test_dump, create_test_instance_uid,
-        create_test_settings, create_test_tasks,
+        create_test_api_keys, create_test_batches, create_test_documents, create_test_dump,
+        create_test_instance_uid, create_test_settings, create_test_tasks,
     };
 
     fn create_directory_hierarchy(dir: &Path) -> String {
@@ -285,8 +314,10 @@ pub(crate) mod test {
         let dump_path = dump.path();
 
         // ==== checking global file hierarchy (we want to be sure there isn't too many files or too few)
-        insta::assert_snapshot!(create_directory_hierarchy(dump_path), @r###"
+        insta::assert_snapshot!(create_directory_hierarchy(dump_path), @r"
         .
+        ├---- batches/
+        │    └---- queue.jsonl
         ├---- indexes/
         │    └---- doggos/
         │    │    ├---- documents.jsonl
@@ -301,7 +332,7 @@ pub(crate) mod test {
         ├---- keys.jsonl
         ├---- metadata.json
         └---- network.json
-        "###);
+        ");
 
         // ==== checking the top level infos
         let metadata = fs::read_to_string(dump_path.join("metadata.json")).unwrap();
@@ -354,6 +385,16 @@ pub(crate) mod test {
             }
         }
 
+        // ==== checking the batch queue
+        let batches_queue = fs::read_to_string(dump_path.join("batches/queue.jsonl")).unwrap();
+        for (batch, expected) in batches_queue.lines().zip(create_test_batches()) {
+            let mut batch = serde_json::from_str::<Batch>(batch).unwrap();
+            if batch.details.settings == Some(Box::new(Settings::<Unchecked>::default())) {
+                batch.details.settings = None;
+            }
+            assert_eq!(batch, expected, "{batch:#?}{expected:#?}");
+        }
+
         // ==== checking the keys
         let keys = fs::read_to_string(dump_path.join("keys.jsonl")).unwrap();
         for (key, expected) in keys.lines().zip(create_test_api_keys()) {

crates/index-scheduler/src/dump.rs

@@ -2,6 +2,7 @@ use std::collections::HashMap;
 use std::io;
 
 use dump::{KindDump, TaskDump, UpdateFile};
+use meilisearch_types::batches::{Batch, BatchId};
 use meilisearch_types::heed::RwTxn;
 use meilisearch_types::milli;
 use meilisearch_types::tasks::{Kind, KindWithContent, Status, Task};
@@ -14,9 +15,15 @@ pub struct Dump<'a> {
     index_scheduler: &'a IndexScheduler,
     wtxn: RwTxn<'a>,
 
+    batch_to_task_mapping: HashMap<BatchId, RoaringBitmap>,
+
     indexes: HashMap<String, RoaringBitmap>,
     statuses: HashMap<Status, RoaringBitmap>,
     kinds: HashMap<Kind, RoaringBitmap>,
+
+    batch_indexes: HashMap<String, RoaringBitmap>,
+    batch_statuses: HashMap<Status, RoaringBitmap>,
+    batch_kinds: HashMap<Kind, RoaringBitmap>,
 }
 
 impl<'a> Dump<'a> {
@@ -27,12 +34,72 @@ impl<'a> Dump<'a> {
         Ok(Dump {
             index_scheduler,
             wtxn,
+            batch_to_task_mapping: HashMap::new(),
             indexes: HashMap::new(),
             statuses: HashMap::new(),
             kinds: HashMap::new(),
+            batch_indexes: HashMap::new(),
+            batch_statuses: HashMap::new(),
+            batch_kinds: HashMap::new(),
         })
     }
 
+    /// Register a new batch coming from a dump in the scheduler.
+    /// By taking a mutable ref we're pretty sure no one will ever import a dump while actix is running.
+    pub fn register_dumped_batch(&mut self, batch: Batch) -> Result<()> {
+        self.index_scheduler.queue.batches.all_batches.put(&mut self.wtxn, &batch.uid, &batch)?;
+        if let Some(enqueued_at) = batch.enqueued_at {
+            utils::insert_task_datetime(
+                &mut self.wtxn,
+                self.index_scheduler.queue.batches.enqueued_at,
+                enqueued_at.earliest,
+                batch.uid,
+            )?;
+            utils::insert_task_datetime(
+                &mut self.wtxn,
+                self.index_scheduler.queue.batches.enqueued_at,
+                enqueued_at.oldest,
+                batch.uid,
+            )?;
+        }
+        utils::insert_task_datetime(
+            &mut self.wtxn,
+            self.index_scheduler.queue.batches.started_at,
+            batch.started_at,
+            batch.uid,
+        )?;
+        if let Some(finished_at) = batch.finished_at {
+            utils::insert_task_datetime(
+                &mut self.wtxn,
+                self.index_scheduler.queue.batches.finished_at,
+                finished_at,
+                batch.uid,
+            )?;
+        }
+
+        for index in batch.stats.index_uids.keys() {
+            match self.batch_indexes.get_mut(index) {
+                Some(bitmap) => {
+                    bitmap.insert(batch.uid);
+                }
+                None => {
+                    let mut bitmap = RoaringBitmap::new();
+                    bitmap.insert(batch.uid);
+                    self.batch_indexes.insert(index.to_string(), bitmap);
+                }
+            };
+        }
+
+        for status in batch.stats.status.keys() {
+            self.batch_statuses.entry(*status).or_default().insert(batch.uid);
+        }
+        for kind in batch.stats.types.keys() {
+            self.batch_kinds.entry(*kind).or_default().insert(batch.uid);
+        }
+
+        Ok(())
+    }
+
     /// Register a new task coming from a dump in the scheduler.
     /// By taking a mutable ref we're pretty sure no one will ever import a dump while actix is running.
     pub fn register_dumped_task(
@@ -149,6 +216,9 @@ impl<'a> Dump<'a> {
         };
 
         self.index_scheduler.queue.tasks.all_tasks.put(&mut self.wtxn, &task.uid, &task)?;
+        if let Some(batch_id) = task.batch_uid {
+            self.batch_to_task_mapping.entry(batch_id).or_default().insert(task.uid);
+        }
 
         for index in task.indexes() {
             match self.indexes.get_mut(index) {
@@ -198,6 +268,14 @@ impl<'a> Dump<'a> {
 
     /// Commit all the changes and exit the importing dump state
     pub fn finish(mut self) -> Result<()> {
+        for (batch_id, task_ids) in self.batch_to_task_mapping {
+            self.index_scheduler.queue.batch_to_tasks_mapping.put(
+                &mut self.wtxn,
+                &batch_id,
+                &task_ids,
+            )?;
+        }
+
         for (index, bitmap) in self.indexes {
             self.index_scheduler.queue.tasks.index_tasks.put(&mut self.wtxn, &index, &bitmap)?;
         }
@@ -208,6 +286,16 @@ impl<'a> Dump<'a> {
             self.index_scheduler.queue.tasks.put_kind(&mut self.wtxn, kind, &bitmap)?;
         }
 
+        for (index, bitmap) in self.batch_indexes {
+            self.index_scheduler.queue.batches.index_tasks.put(&mut self.wtxn, &index, &bitmap)?;
+        }
+        for (status, bitmap) in self.batch_statuses {
+            self.index_scheduler.queue.batches.put_status(&mut self.wtxn, status, &bitmap)?;
+        }
+        for (kind, bitmap) in self.batch_kinds {
+            self.index_scheduler.queue.batches.put_kind(&mut self.wtxn, kind, &bitmap)?;
+        }
+
         self.wtxn.commit()?;
         self.index_scheduler.scheduler.wake_up.signal();
 

crates/index-scheduler/src/processing.rs

@@ -96,6 +96,7 @@ make_enum_progress! {
         StartTheDumpCreation,
         DumpTheApiKeys,
         DumpTheTasks,
+        DumpTheBatches,
         DumpTheIndexes,
         DumpTheExperimentalFeatures,
         CompressTheDump,

crates/index-scheduler/src/scheduler/process_dump_creation.rs

@@ -1,3 +1,4 @@
+use std::collections::BTreeMap;
 use std::fs::File;
 use std::io::BufWriter;
 use std::sync::atomic::Ordering;
@@ -11,7 +12,9 @@ use meilisearch_types::tasks::{Details, KindWithContent, Status, Task};
 use time::macros::format_description;
 use time::OffsetDateTime;
 
-use crate::processing::{AtomicDocumentStep, AtomicTaskStep, DumpCreationProgress};
+use crate::processing::{
+    AtomicBatchStep, AtomicDocumentStep, AtomicTaskStep, DumpCreationProgress,
+};
 use crate::{Error, IndexScheduler, Result};
 
 impl IndexScheduler {
@@ -102,7 +105,40 @@ impl IndexScheduler {
         }
         dump_tasks.flush()?;
 
-        // 3. Dump the indexes
+        // 3. dump the batches
+        progress.update_progress(DumpCreationProgress::DumpTheBatches);
+        let mut dump_batches = dump.create_batches_queue()?;
+
+        let (atomic, update_batch_progress) =
+            AtomicBatchStep::new(self.queue.batches.all_batches.len(&rtxn)? as u32);
+        progress.update_progress(update_batch_progress);
+
+        for ret in self.queue.batches.all_batches.iter(&rtxn)? {
+            if self.scheduler.must_stop_processing.get() {
+                return Err(Error::AbortedTask);
+            }
+
+            let (_, mut b) = ret?;
+            // In the case we're dumping ourselves we want to be marked as finished
+            // to not loop over ourselves indefinitely.
+            if b.uid == task.uid {
+                let finished_at = OffsetDateTime::now_utc();
+
+                // We're going to fake the date because we don't know if everything is going to go well.
+                // But we need to dump the task as finished and successful.
+                // If something fail everything will be set appropriately in the end.
+                let mut statuses = BTreeMap::new();
+                statuses.insert(Status::Succeeded, b.stats.total_nb_tasks);
+                b.stats.status = statuses;
+                b.finished_at = Some(finished_at);
+            }
+
+            dump_batches.push_batch(&b)?;
+            atomic.fetch_add(1, Ordering::Relaxed);
+        }
+        dump_batches.flush()?;
+
+        // 4. Dump the indexes
         progress.update_progress(DumpCreationProgress::DumpTheIndexes);
         let nb_indexes = self.index_mapper.index_mapping.len(&rtxn)? as u32;
         let mut count = 0;
@@ -142,7 +178,7 @@ impl IndexScheduler {
             let documents = index
                 .all_documents(&rtxn)
                 .map_err(|e| Error::from_milli(e, Some(uid.to_string())))?;
-            // 3.1. Dump the documents
+            // 4.1. Dump the documents
             for ret in documents {
                 if self.scheduler.must_stop_processing.get() {
                     return Err(Error::AbortedTask);
@@ -204,7 +240,7 @@ impl IndexScheduler {
                 atomic.fetch_add(1, Ordering::Relaxed);
             }
 
-            // 3.2. Dump the settings
+            // 4.2. Dump the settings
             let settings = meilisearch_types::settings::settings(
                 index,
                 &rtxn,
@@ -215,7 +251,7 @@ impl IndexScheduler {
             Ok(())
         })?;
 
-        // 4. Dump experimental feature settings
+        // 5. Dump experimental feature settings
         progress.update_progress(DumpCreationProgress::DumpTheExperimentalFeatures);
         let features = self.features().runtime_features();
         dump.create_experimental_features(features)?;

crates/meilisearch-types/src/batches.rs

@@ -30,7 +30,21 @@ pub struct Batch {
     pub enqueued_at: Option<BatchEnqueuedAt>,
 }
 
-#[derive(Clone, Copy, Debug, Serialize, Deserialize)]
+impl PartialEq for Batch {
+    fn eq(&self, other: &Self) -> bool {
+        let Self { uid, progress, details, stats, started_at, finished_at, enqueued_at } = self;
+
+        *uid == other.uid
+            && progress.is_none() == other.progress.is_none()
+            && details == &other.details
+            && stats == &other.stats
+            && started_at == &other.started_at
+            && finished_at == &other.finished_at
+            && enqueued_at == &other.enqueued_at
+    }
+}
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)]
 pub struct BatchEnqueuedAt {
     #[serde(with = "time::serde::rfc3339")]
     pub earliest: OffsetDateTime,
@@ -38,7 +52,7 @@ pub struct BatchEnqueuedAt {
     pub oldest: OffsetDateTime,
 }
 
-#[derive(Default, Debug, Clone, Serialize, Deserialize, ToSchema)]
+#[derive(Default, Debug, Clone, PartialEq, Eq, Serialize, Deserialize, ToSchema)]
 #[serde(rename_all = "camelCase")]
 #[schema(rename_all = "camelCase")]
 pub struct BatchStats {

crates/meilisearch/src/lib.rs

@@ -511,9 +511,15 @@ fn import_dump(
         index_scheduler.refresh_index_stats(&uid)?;
     }
 
+    // 5. Import the queue
     let mut index_scheduler_dump = index_scheduler.register_dumped_task()?;
+    // 5.1. Import the batches
+    for ret in dump_reader.batches()? {
+        let batch = ret?;
+        index_scheduler_dump.register_dumped_batch(batch)?;
+    }
 
-    // 5. Import the tasks.
+    // 5.2. Import the tasks
     for ret in dump_reader.tasks()? {
         let (task, file) = ret?;
         index_scheduler_dump.register_dumped_task(task, file)?;

crates/meilitool/src/main.rs

@@ -8,6 +8,7 @@ use clap::{Parser, Subcommand};
 use dump::{DumpWriter, IndexMetadata};
 use file_store::FileStore;
 use meilisearch_auth::AuthController;
+use meilisearch_types::batches::Batch;
 use meilisearch_types::heed::types::{SerdeJson, Str};
 use meilisearch_types::heed::{
     CompactionOption, Database, Env, EnvOpenOptions, RoTxn, RwTxn, Unspecified,
@@ -255,70 +256,86 @@ fn export_a_dump(
 
     eprintln!("Successfully dumped {count} keys!");
 
+    eprintln!("Dumping the queue");
     let rtxn = env.read_txn()?;
     let all_tasks: Database<BEU32, SerdeJson<Task>> =
         try_opening_database(&env, &rtxn, "all-tasks")?;
+    let all_batches: Database<BEU32, SerdeJson<Batch>> =
+        try_opening_database(&env, &rtxn, "all-batches")?;
     let index_mapping: Database<Str, UuidCodec> =
         try_opening_database(&env, &rtxn, "index-mapping")?;
 
-    if skip_enqueued_tasks {
-        eprintln!("Skip dumping the enqueued tasks...");
-    } else {
-        let mut dump_tasks = dump.create_tasks_queue()?;
-        let mut count = 0;
-        for ret in all_tasks.iter(&rtxn)? {
-            let (_, t) = ret?;
-            let status = t.status;
-            let content_file = t.content_uuid();
+    eprintln!("Dumping the tasks");
+    let mut dump_tasks = dump.create_tasks_queue()?;
+    let mut count_tasks = 0;
+    let mut count_enqueued_tasks = 0;
+    for ret in all_tasks.iter(&rtxn)? {
+        let (_, t) = ret?;
+        let status = t.status;
+        let content_file = t.content_uuid();
 
-            let mut dump_content_file = dump_tasks.push_task(&t.into())?;
+        if status == Status::Enqueued && skip_enqueued_tasks {
+            continue;
+        }
 
-            // 3.1. Dump the `content_file` associated with the task if there is one and the task is not finished yet.
-            if let Some(content_file_uuid) = content_file {
-                if status == Status::Enqueued {
-                    let content_file = file_store.get_update(content_file_uuid)?;
+        let mut dump_content_file = dump_tasks.push_task(&t.into())?;
 
-                    if (detected_version.0, detected_version.1, detected_version.2) < (1, 12, 0) {
-                        eprintln!("Dumping the enqueued tasks reading them in obkv format...");
-                        let reader =
-                            DocumentsBatchReader::from_reader(content_file).with_context(|| {
-                                format!("While reading content file {:?}", content_file_uuid)
-                            })?;
-                        let (mut cursor, documents_batch_index) =
-                            reader.into_cursor_and_fields_index();
-                        while let Some(doc) = cursor.next_document().with_context(|| {
-                            format!("While iterating on content file {:?}", content_file_uuid)
-                        })? {
-                            dump_content_file
-                                .push_document(&obkv_to_object(doc, &documents_batch_index)?)?;
-                        }
-                    } else {
-                        eprintln!(
-                            "Dumping the enqueued tasks reading them in JSON stream format..."
-                        );
-                        for document in
-                            serde_json::de::Deserializer::from_reader(content_file).into_iter()
-                        {
-                            let document = document.with_context(|| {
-                                format!("While reading content file {:?}", content_file_uuid)
-                            })?;
-                            dump_content_file.push_document(&document)?;
-                        }
+        // 3.1. Dump the `content_file` associated with the task if there is one and the task is not finished yet.
+        if let Some(content_file_uuid) = content_file {
+            if status == Status::Enqueued {
+                let content_file = file_store.get_update(content_file_uuid)?;
+
+                if (detected_version.0, detected_version.1, detected_version.2) < (1, 12, 0) {
+                    eprintln!("Dumping the enqueued tasks reading them in obkv format...");
+                    let reader =
+                        DocumentsBatchReader::from_reader(content_file).with_context(|| {
+                            format!("While reading content file {:?}", content_file_uuid)
+                        })?;
+                    let (mut cursor, documents_batch_index) = reader.into_cursor_and_fields_index();
+                    while let Some(doc) = cursor.next_document().with_context(|| {
+                        format!("While iterating on content file {:?}", content_file_uuid)
+                    })? {
+                        dump_content_file
+                            .push_document(&obkv_to_object(doc, &documents_batch_index)?)?;
+                    }
+                } else {
+                    eprintln!("Dumping the enqueued tasks reading them in JSON stream format...");
+                    for document in
+                        serde_json::de::Deserializer::from_reader(content_file).into_iter()
+                    {
+                        let document = document.with_context(|| {
+                            format!("While reading content file {:?}", content_file_uuid)
+                        })?;
+                        dump_content_file.push_document(&document)?;
                     }
-
-                    dump_content_file.flush()?;
-                    count += 1;
                 }
+
+                dump_content_file.flush()?;
+                count_enqueued_tasks += 1;
             }
         }
-        dump_tasks.flush()?;
-
-        eprintln!("Successfully dumped {count} enqueued tasks!");
+        count_tasks += 1;
     }
+    dump_tasks.flush()?;
+    eprintln!(
+        "Successfully dumped {count_tasks} tasks including {count_enqueued_tasks} enqueued tasks!"
+    );
 
+    // 4. dump the batches
+    eprintln!("Dumping the batches");
+    let mut dump_batches = dump.create_batches_queue()?;
+    let mut count = 0;
+
+    for ret in all_batches.iter(&rtxn)? {
+        let (_, b) = ret?;
+        dump_batches.push_batch(&b)?;
+        count += 1;
+    }
+    dump_batches.flush()?;
+    eprintln!("Successfully dumped {count} batches!");
+
+    // 5. Dump the indexes
     eprintln!("Dumping the indexes...");
-
-    // 4. Dump the indexes
     let mut count = 0;
     for result in index_mapping.iter(&rtxn)? {
         let (uid, uuid) = result?;
@@ -339,14 +356,14 @@ fn export_a_dump(
         let fields_ids_map = index.fields_ids_map(&rtxn)?;
         let all_fields: Vec<_> = fields_ids_map.iter().map(|(id, _)| id).collect();
 
-        // 4.1. Dump the documents
+        // 5.1. Dump the documents
         for ret in index.all_documents(&rtxn)? {
             let (_id, doc) = ret?;
             let document = obkv_to_json(&all_fields, &fields_ids_map, doc)?;
             index_dumper.push_document(&document)?;
         }
 
-        // 4.2. Dump the settings
+        // 5.2. Dump the settings
         let settings = meilisearch_types::settings::settings(
             &index,
             &rtxn,