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multi_index udpate store

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This commit is contained in:
Marin Postma 2021-04-12 16:59:16 +02:00
parent 7055384aeb
commit 5a38f13cae
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GPG Key ID: D5241F0C0C865F30
4 changed files with 196 additions and 67 deletions
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1
Cargo.lock generated
View File

@ -1756,6 +1756,7 @@ dependencies = [
"async-stream",
"async-trait",
"byte-unit",
"bytemuck",
"bytes 0.6.0",
"cargo_toml",
"chrono",

1
meilisearch-http/Cargo.toml
View File

@ -32,6 +32,7 @@ async-compression = { version = "0.3.6", features = ["gzip", "tokio-02"] }
async-stream = "0.3.0"
async-trait = "0.1.42"
byte-unit = { version = "4.0.9", default-features = false, features = ["std"] }
bytemuck = "1.5.1"
bytes = "0.6.0"
chrono = { version = "0.4.19", features = ["serde"] }
crossbeam-channel = "0.5.0"

257
meilisearch-http/src/index_controller/update_actor/update_store.rs
View File

@ -1,10 +1,13 @@
use std::fs::File;
use std::fs::{copy, create_dir_all, remove_file};
use std::borrow::Cow;
use std::convert::TryInto;
use std::fs::{copy, create_dir_all, remove_file, File};
use std::mem::size_of;
use std::path::{Path, PathBuf};
use std::sync::Arc;
use heed::types::{DecodeIgnore, OwnedType, SerdeJson};
use heed::{CompactionOption, Database, Env, EnvOpenOptions};
use bytemuck::{Pod, Zeroable};
use heed::types::{ByteSlice, DecodeIgnore, SerdeJson};
use heed::{BytesDecode, BytesEncode, CompactionOption, Database, Env, EnvOpenOptions};
use parking_lot::{Mutex, RwLock};
use serde::{Deserialize, Serialize};
use tokio::sync::mpsc;
@ -16,15 +19,54 @@ use crate::index_controller::updates::*;
#[allow(clippy::upper_case_acronyms)]
type BEU64 = heed::zerocopy::U64<heed::byteorder::BE>;
struct IndexUuidUpdateIdCodec;
#[repr(C)]
#[derive(Copy, Clone)]
struct IndexUuidUpdateId(Uuid, BEU64);
// Is Uuid really zeroable (semantically)?
unsafe impl Zeroable for IndexUuidUpdateId {}
unsafe impl Pod for IndexUuidUpdateId {}
impl IndexUuidUpdateId {
fn new(uuid: Uuid, update_id: u64) -> Self {
Self(uuid, BEU64::new(update_id))
}
}
const UUID_SIZE: usize = size_of::<Uuid>();
const U64_SIZE: usize = size_of::<BEU64>();
impl<'a> BytesEncode<'a> for IndexUuidUpdateIdCodec {
type EItem = IndexUuidUpdateId;
fn bytes_encode(item: &'a Self::EItem) -> Option<std::borrow::Cow<'a, [u8]>> {
let bytes = bytemuck::cast_ref::<IndexUuidUpdateId, [u8; UUID_SIZE + U64_SIZE]>(item);
Some(Cow::Borrowed(&bytes[..]))
}
}
impl<'a> BytesDecode<'a> for IndexUuidUpdateIdCodec {
type DItem = (Uuid, u64);
fn bytes_decode(bytes: &'a [u8]) -> Option<Self::DItem> {
let bytes = bytes.try_into().ok()?;
let IndexUuidUpdateId(uuid, id) =
bytemuck::cast_ref::<[u8; UUID_SIZE + U64_SIZE], IndexUuidUpdateId>(bytes);
Some((*uuid, id.get()))
}
}
#[derive(Clone)]
pub struct UpdateStore<M, N, E> {
pub env: Env,
pending_meta: Database<OwnedType<BEU64>, SerdeJson<Enqueued<M>>>,
pending: Database<OwnedType<BEU64>, SerdeJson<PathBuf>>,
processed_meta: Database<OwnedType<BEU64>, SerdeJson<Processed<M, N>>>,
failed_meta: Database<OwnedType<BEU64>, SerdeJson<Failed<M, E>>>,
aborted_meta: Database<OwnedType<BEU64>, SerdeJson<Aborted<M>>>,
processing: Arc<RwLock<Option<Processing<M>>>>,
pending_meta: Database<ByteSlice, SerdeJson<Enqueued<M>>>,
pending: Database<ByteSlice, SerdeJson<PathBuf>>,
processed_meta: Database<ByteSlice, SerdeJson<Processed<M, N>>>,
failed_meta: Database<ByteSlice, SerdeJson<Failed<M, E>>>,
aborted_meta: Database<ByteSlice, SerdeJson<Aborted<M>>>,
processing: Arc<RwLock<Option<(Uuid, Processing<M>)>>>,
notification_sender: mpsc::Sender<()>,
/// A lock on the update loop. This is meant to prevent a snapshot to occur while an update is
/// processing, while not preventing writes all together during an update
@ -34,6 +76,7 @@ pub struct UpdateStore<M, N, E> {
pub trait HandleUpdate<M, N, E> {
fn handle_update(
&mut self,
index_uuid: Uuid,
meta: Processing<M>,
content: File,
) -> anyhow::Result<Result<Processed<M, N>, Failed<M, E>>>;
@ -41,14 +84,15 @@ pub trait HandleUpdate<M, N, E> {
impl<M, N, E, F> HandleUpdate<M, N, E> for F
where
F: FnMut(Processing<M>, File) -> anyhow::Result<Result<Processed<M, N>, Failed<M, E>>>,
F: FnMut(Uuid, Processing<M>, File) -> anyhow::Result<Result<Processed<M, N>, Failed<M, E>>>,
{
fn handle_update(
&mut self,
index_uuid: Uuid,
meta: Processing<M>,
content: File,
) -> anyhow::Result<Result<Processed<M, N>, Failed<M, E>>> {
self(meta, content)
self(index_uuid, meta, content)
}
}
@ -131,24 +175,35 @@ where
}
/// Returns the new biggest id to use to store the new update.
fn new_update_id(&self, txn: &heed::RoTxn) -> heed::Result<u64> {
fn new_update_id(&self, txn: &heed::RoTxn, index_uuid: Uuid) -> heed::Result<u64> {
// TODO: this is a very inneficient process for finding the next update id for each index,
// and needs to be made better.
let last_pending = self
.pending_meta
.remap_data_type::<DecodeIgnore>()
.last(txn)?
.map(|(k, _)| k.get());
.prefix_iter(txn, index_uuid.as_bytes())?
.remap_key_type::<IndexUuidUpdateIdCodec>()
.last()
.transpose()?
.map(|((_, id), _)| id);
let last_processed = self
.processed_meta
.remap_data_type::<DecodeIgnore>()
.last(txn)?
.map(|(k, _)| k.get());
.prefix_iter(txn, index_uuid.as_bytes())?
.remap_key_type::<IndexUuidUpdateIdCodec>()
.last()
.transpose()?
.map(|((_, id), _)| id);
let last_aborted = self
.aborted_meta
.remap_data_type::<DecodeIgnore>()
.last(txn)?
.map(|(k, _)| k.get());
.prefix_iter(txn, index_uuid.as_bytes())?
.remap_key_type::<IndexUuidUpdateIdCodec>()
.last()
.transpose()?
.map(|((_, id), _)| id);
let last_update_id = [last_pending, last_processed, last_aborted]
.iter()
@ -176,13 +231,16 @@ where
// no other update can have the same id because we use a write txn before
// asking for the id and registering it so other update registering
// will be forced to wait for a new write txn.
let update_id = self.new_update_id(&wtxn)?;
let update_key = BEU64::new(update_id);
let update_id = self.new_update_id(&wtxn, index_uuid)?;
let meta = Enqueued::new(meta, update_id);
let key = IndexUuidUpdateId::new(index_uuid, update_id);
self.pending_meta
.remap_key_type::<IndexUuidUpdateIdCodec>()
.put(&mut wtxn, &key, &meta)?;
let meta = Enqueued::new(meta, update_id, index_uuid);
self.pending_meta.put(&mut wtxn, &update_key, &meta)?;
self.pending
.put(&mut wtxn, &update_key, &content.as_ref().to_owned())?;
.remap_key_type::<IndexUuidUpdateIdCodec>()
.put(&mut wtxn, &key, &content.as_ref().to_owned())?;
wtxn.commit()?;
@ -191,6 +249,7 @@ where
.expect("Update store loop exited.");
Ok(meta)
}
/// Executes the user provided function on the next pending update (the one with the lowest id).
/// This is asynchronous as it let the user process the update with a read-only txn and
/// only writing the result meta to the processed-meta store *after* it has been processed.
@ -201,25 +260,31 @@ where
let _lock = self.update_lock.lock();
// Create a read transaction to be able to retrieve the pending update in order.
let rtxn = self.env.read_txn()?;
let first_meta = self.pending_meta.first(&rtxn)?;
let first_meta = self
.pending_meta
.remap_key_type::<IndexUuidUpdateIdCodec>()
.first(&rtxn)?;
// If there is a pending update we process and only keep
// a reader while processing it, not a writer.
match first_meta {
Some((first_id, pending)) => {
Some(((index_uuid, update_id), pending)) => {
let key = IndexUuidUpdateId::new(index_uuid, update_id);
let content_path = self
.pending
.get(&rtxn, &first_id)?
.remap_key_type::<IndexUuidUpdateIdCodec>()
.get(&rtxn, &key)?
.expect("associated update content");
// we change the state of the update from pending to processing before we pass it
// to the update handler. Processing store is non persistent to be able recover
// from a failure
let processing = pending.processing();
self.processing.write().replace(processing.clone());
self.processing.write().replace((index_uuid, processing.clone()));
let file = File::open(&content_path)?;
// Process the pending update using the provided user function.
let result = handler.handle_update(processing, file)?;
let result = handler.handle_update(index_uuid, processing, file)?;
drop(rtxn);
// Once the pending update have been successfully processed
@ -227,12 +292,24 @@ where
// write the *new* meta to the processed-meta store and commit.
let mut wtxn = self.env.write_txn()?;
self.processing.write().take();
self.pending_meta.delete(&mut wtxn, &first_id)?;
self.pending_meta
.remap_key_type::<IndexUuidUpdateIdCodec>()
.delete(&mut wtxn, &key)?;
remove_file(&content_path)?;
self.pending.delete(&mut wtxn, &first_id)?;
self.pending
.remap_key_type::<IndexUuidUpdateIdCodec>()
.delete(&mut wtxn, &key)?;
match result {
Ok(processed) => self.processed_meta.put(&mut wtxn, &first_id, &processed)?,
Err(failed) => self.failed_meta.put(&mut wtxn, &first_id, &failed)?,
Ok(processed) => self
.processed_meta
.remap_key_type::<IndexUuidUpdateIdCodec>()
.put(&mut wtxn, &key, &processed)?,
Err(failed) => self
.failed_meta
.remap_key_type::<IndexUuidUpdateIdCodec>()
.put(&mut wtxn, &key, &failed)?,
}
wtxn.commit()?;
@ -242,28 +319,30 @@ where
}
}
pub fn list(&self) -> anyhow::Result<Vec<UpdateStatus<M, N, E>>> {
pub fn list(&self, index_uuid: Uuid) -> anyhow::Result<Vec<UpdateStatus<M, N, E>>> {
let rtxn = self.env.read_txn()?;
let mut updates = Vec::new();
let processing = self.processing.read();
if let Some(ref processing) = *processing {
let update = UpdateStatus::from(processing.clone());
updates.push(update);
if let Some((uuid, ref processing)) = *processing {
if uuid == index_uuid {
let update = UpdateStatus::from(processing.clone());
updates.push(update);
}
}
let pending = self
.pending_meta
.iter(&rtxn)?
.prefix_iter(&rtxn, index_uuid.as_bytes())?
.filter_map(Result::ok)
.filter_map(|(_, p)| (Some(p.id()) != processing.as_ref().map(|p| p.id())).then(|| p))
.filter_map(|(_, p)| (Some(p.id()) != processing.as_ref().map(|p| p.1.id())).then(|| p))
.map(UpdateStatus::from);
updates.extend(pending);
let aborted = self
.aborted_meta
.iter(&rtxn)?
.prefix_iter(&rtxn, index_uuid.as_bytes())?
.filter_map(Result::ok)
.map(|(_, p)| p)
.map(UpdateStatus::from);
@ -294,29 +373,49 @@ where
}
/// Returns the update associated meta or `None` if the update doesn't exist.
pub fn meta(&self, update_id: u64) -> heed::Result<Option<UpdateStatus<M, N, E>>> {
pub fn meta(
&self,
index_uuid: Uuid,
update_id: u64,
) -> heed::Result<Option<UpdateStatus<M, N, E>>> {
let rtxn = self.env.read_txn()?;
let key = BEU64::new(update_id);
let key = IndexUuidUpdateId::new(index_uuid, update_id);
if let Some(ref meta) = *self.processing.read() {
if meta.id() == update_id {
if let Some((uuid, ref meta)) = *self.processing.read() {
if uuid == index_uuid && meta.id() == update_id {
return Ok(Some(UpdateStatus::Processing(meta.clone())));
}
}
if let Some(meta) = self.pending_meta.get(&rtxn, &key)? {
if let Some(meta) = self
.pending_meta
.remap_key_type::<IndexUuidUpdateIdCodec>()
.get(&rtxn, &key)?
{
return Ok(Some(UpdateStatus::Enqueued(meta)));
}
if let Some(meta) = self.processed_meta.get(&rtxn, &key)? {
if let Some(meta) = self
.processed_meta
.remap_key_type::<IndexUuidUpdateIdCodec>()
.get(&rtxn, &key)?
{
return Ok(Some(UpdateStatus::Processed(meta)));
}
if let Some(meta) = self.aborted_meta.get(&rtxn, &key)? {
if let Some(meta) = self
.aborted_meta
.remap_key_type::<IndexUuidUpdateIdCodec>()
.get(&rtxn, &key)?
{
return Ok(Some(UpdateStatus::Aborted(meta)));
}
if let Some(meta) = self.failed_meta.get(&rtxn, &key)? {
if let Some(meta) = self
.failed_meta
.remap_key_type::<IndexUuidUpdateIdCodec>()
.get(&rtxn, &key)?
{
return Ok(Some(UpdateStatus::Failed(meta)));
}
@ -330,25 +429,45 @@ where
/// that as already been processed or which doesn't actually exist, will
/// return `None`.
#[allow(dead_code)]
pub fn abort_update(&self, update_id: u64) -> heed::Result<Option<Aborted<M>>> {
pub fn abort_update(
&self,
index_uuid: Uuid,
update_id: u64,
) -> heed::Result<Option<Aborted<M>>> {
let mut wtxn = self.env.write_txn()?;
let key = BEU64::new(update_id);
let key = IndexUuidUpdateId::new(index_uuid, update_id);
// We cannot abort an update that is currently being processed.
if self.pending_meta.first(&wtxn)?.map(|(key, _)| key.get()) == Some(update_id) {
if self
.pending_meta
.remap_key_type::<IndexUuidUpdateIdCodec>()
.first(&wtxn)?
.map(|((_, id), _)| id)
== Some(update_id)
{
return Ok(None);
}
let pending = match self.pending_meta.get(&wtxn, &key)? {
let pending = match self
.pending_meta
.remap_key_type::<IndexUuidUpdateIdCodec>()
.get(&wtxn, &key)?
{
Some(meta) => meta,
None => return Ok(None),
};
let aborted = pending.abort();
self.aborted_meta.put(&mut wtxn, &key, &aborted)?;
self.pending_meta.delete(&mut wtxn, &key)?;
self.pending.delete(&mut wtxn, &key)?;
self.aborted_meta
.remap_key_type::<IndexUuidUpdateIdCodec>()
.put(&mut wtxn, &key, &aborted)?;
self.pending_meta
.remap_key_type::<IndexUuidUpdateIdCodec>()
.delete(&mut wtxn, &key)?;
self.pending
.remap_key_type::<IndexUuidUpdateIdCodec>()
.delete(&mut wtxn, &key)?;
wtxn.commit()?;
@ -358,22 +477,32 @@ where
/// Aborts all the pending updates, and not the one being currently processed.
/// Returns the update metas and ids that were successfully aborted.
#[allow(dead_code)]
pub fn abort_pendings(&self) -> heed::Result<Vec<(u64, Aborted<M>)>> {
pub fn abort_pendings(&self, index_uuid: Uuid) -> heed::Result<Vec<(u64, Aborted<M>)>> {
let mut wtxn = self.env.write_txn()?;
let mut aborted_updates = Vec::new();
// We skip the first pending update as it is currently being processed.
for result in self.pending_meta.iter(&wtxn)?.skip(1) {
let (key, pending) = result?;
let id = key.get();
aborted_updates.push((id, pending.abort()));
for result in self
.pending_meta
.prefix_iter(&wtxn, index_uuid.as_bytes())?
.remap_key_type::<IndexUuidUpdateIdCodec>()
.skip(1)
{
let ((_, update_id), pending) = result?;
aborted_updates.push((update_id, pending.abort()));
}
for (id, aborted) in &aborted_updates {
let key = BEU64::new(*id);
self.aborted_meta.put(&mut wtxn, &key, &aborted)?;
self.pending_meta.delete(&mut wtxn, &key)?;
self.pending.delete(&mut wtxn, &key)?;
let key = IndexUuidUpdateId::new(index_uuid, *id);
self.aborted_meta
.remap_key_type::<IndexUuidUpdateIdCodec>()
.put(&mut wtxn, &key, &aborted)?;
self.pending_meta
.remap_key_type::<IndexUuidUpdateIdCodec>()
.delete(&mut wtxn, &key)?;
self.pending
.remap_key_type::<IndexUuidUpdateIdCodec>()
.delete(&mut wtxn, &key)?;
}
wtxn.commit()?;

4
meilisearch-http/src/index_controller/updates.rs
View File

@ -8,16 +8,14 @@ pub struct Enqueued<M> {
pub update_id: u64,
pub meta: M,
pub enqueued_at: DateTime<Utc>,
pub index_uuid: Uuid,
}
impl<M> Enqueued<M> {
pub fn new(meta: M, update_id: u64, index_uuid: Uuid) -> Self {
pub fn new(meta: M, update_id: u64) -> Self {
Self {
enqueued_at: Utc::now(),
meta,
update_id,
index_uuid,
}
}