MeiliSearch/index-scheduler/src/batch.rs
bors[bot] 667bb87e35
Merge #3541
3541: Add cache on the indexes stats r=dureuill a=irevoire

Fix https://github.com/meilisearch/meilisearch/issues/3540

Co-authored-by: Tamo <tamo@meilisearch.com>
Co-authored-by: Louis Dureuil <louis@meilisearch.com>
2023-03-09 13:32:52 +00:00

1424 lines
60 KiB
Rust

/*!
This module handles the creation and processing of batch operations.
A batch is a combination of multiple tasks that can be processed at once.
Executing a batch operation should always be functionally equivalent to
executing each of its tasks' operations individually and in order.
For example, if the user sends two tasks:
1. import documents X
2. import documents Y
We can combine the two tasks in a single batch:
1. import documents X and Y
Processing this batch is functionally equivalent to processing the two
tasks individally, but should be much faster since we are only performing
one indexing operation.
*/
use std::collections::{BTreeSet, HashSet};
use std::ffi::OsStr;
use std::fs::{self, File};
use std::io::BufWriter;
use dump::IndexMetadata;
use log::{debug, error, info};
use meilisearch_types::heed::{RoTxn, RwTxn};
use meilisearch_types::milli::documents::{obkv_to_object, DocumentsBatchReader};
use meilisearch_types::milli::heed::CompactionOption;
use meilisearch_types::milli::update::{
DocumentDeletionResult, IndexDocumentsConfig, IndexDocumentsMethod, Settings as MilliSettings,
};
use meilisearch_types::milli::{self, BEU32};
use meilisearch_types::settings::{apply_settings_to_builder, Settings, Unchecked};
use meilisearch_types::tasks::{Details, IndexSwap, Kind, KindWithContent, Status, Task};
use meilisearch_types::{compression, Index, VERSION_FILE_NAME};
use roaring::RoaringBitmap;
use time::macros::format_description;
use time::OffsetDateTime;
use uuid::Uuid;
use crate::autobatcher::{self, BatchKind};
use crate::utils::{self, swap_index_uid_in_task};
use crate::{Error, IndexScheduler, ProcessingTasks, Result, TaskId};
/// Represents a combination of tasks that can all be processed at the same time.
///
/// A batch contains the set of tasks that it represents (accessible through
/// [`self.ids()`](Batch::ids)), as well as additional information on how to
/// be processed.
#[derive(Debug)]
pub(crate) enum Batch {
TaskCancelation {
/// The task cancelation itself.
task: Task,
/// The date and time at which the previously processing tasks started.
previous_started_at: OffsetDateTime,
/// The list of tasks that were processing when this task cancelation appeared.
previous_processing_tasks: RoaringBitmap,
},
TaskDeletion(Task),
SnapshotCreation(Vec<Task>),
Dump(Task),
IndexOperation {
op: IndexOperation,
must_create_index: bool,
},
IndexCreation {
index_uid: String,
primary_key: Option<String>,
task: Task,
},
IndexUpdate {
index_uid: String,
primary_key: Option<String>,
task: Task,
},
IndexDeletion {
index_uid: String,
tasks: Vec<Task>,
index_has_been_created: bool,
},
IndexSwap {
task: Task,
},
}
#[derive(Debug)]
pub(crate) enum DocumentOperation {
Add(Uuid),
Delete(Vec<String>),
}
/// A [batch](Batch) that combines multiple tasks operating on an index.
#[derive(Debug)]
pub(crate) enum IndexOperation {
DocumentOperation {
index_uid: String,
primary_key: Option<String>,
method: IndexDocumentsMethod,
documents_counts: Vec<u64>,
operations: Vec<DocumentOperation>,
tasks: Vec<Task>,
},
DocumentDeletion {
index_uid: String,
// The vec associated with each document deletion tasks.
documents: Vec<Vec<String>>,
tasks: Vec<Task>,
},
DocumentClear {
index_uid: String,
tasks: Vec<Task>,
},
Settings {
index_uid: String,
// The boolean indicates if it's a settings deletion or creation.
settings: Vec<(bool, Settings<Unchecked>)>,
tasks: Vec<Task>,
},
DocumentClearAndSetting {
index_uid: String,
cleared_tasks: Vec<Task>,
// The boolean indicates if it's a settings deletion or creation.
settings: Vec<(bool, Settings<Unchecked>)>,
settings_tasks: Vec<Task>,
},
SettingsAndDocumentOperation {
index_uid: String,
primary_key: Option<String>,
method: IndexDocumentsMethod,
documents_counts: Vec<u64>,
operations: Vec<DocumentOperation>,
document_import_tasks: Vec<Task>,
// The boolean indicates if it's a settings deletion or creation.
settings: Vec<(bool, Settings<Unchecked>)>,
settings_tasks: Vec<Task>,
},
}
impl Batch {
/// Return the task ids associated with this batch.
pub fn ids(&self) -> Vec<TaskId> {
match self {
Batch::TaskCancelation { task, .. }
| Batch::TaskDeletion(task)
| Batch::Dump(task)
| Batch::IndexCreation { task, .. }
| Batch::IndexUpdate { task, .. } => vec![task.uid],
Batch::SnapshotCreation(tasks) | Batch::IndexDeletion { tasks, .. } => {
tasks.iter().map(|task| task.uid).collect()
}
Batch::IndexOperation { op, .. } => match op {
IndexOperation::DocumentOperation { tasks, .. }
| IndexOperation::DocumentDeletion { tasks, .. }
| IndexOperation::Settings { tasks, .. }
| IndexOperation::DocumentClear { tasks, .. } => {
tasks.iter().map(|task| task.uid).collect()
}
IndexOperation::SettingsAndDocumentOperation {
document_import_tasks: tasks,
settings_tasks: other,
..
}
| IndexOperation::DocumentClearAndSetting {
cleared_tasks: tasks,
settings_tasks: other,
..
} => tasks.iter().chain(other).map(|task| task.uid).collect(),
},
Batch::IndexSwap { task } => vec![task.uid],
}
}
/// Return the index UID associated with this batch
pub fn index_uid(&self) -> Option<&str> {
use Batch::*;
match self {
TaskCancelation { .. }
| TaskDeletion(_)
| SnapshotCreation(_)
| Dump(_)
| IndexSwap { .. } => None,
IndexOperation { op, .. } => Some(op.index_uid()),
IndexCreation { index_uid, .. }
| IndexUpdate { index_uid, .. }
| IndexDeletion { index_uid, .. } => Some(index_uid),
}
}
}
impl IndexOperation {
pub fn index_uid(&self) -> &str {
match self {
IndexOperation::DocumentOperation { index_uid, .. }
| IndexOperation::DocumentDeletion { index_uid, .. }
| IndexOperation::DocumentClear { index_uid, .. }
| IndexOperation::Settings { index_uid, .. }
| IndexOperation::DocumentClearAndSetting { index_uid, .. }
| IndexOperation::SettingsAndDocumentOperation { index_uid, .. } => index_uid,
}
}
}
impl IndexScheduler {
/// Convert an [`BatchKind`](crate::autobatcher::BatchKind) into a [`Batch`].
///
/// ## Arguments
/// - `rtxn`: read transaction
/// - `index_uid`: name of the index affected by the operations of the autobatch
/// - `batch`: the result of the autobatcher
pub(crate) fn create_next_batch_index(
&self,
rtxn: &RoTxn,
index_uid: String,
batch: BatchKind,
must_create_index: bool,
) -> Result<Option<Batch>> {
match batch {
BatchKind::DocumentClear { ids } => Ok(Some(Batch::IndexOperation {
op: IndexOperation::DocumentClear {
tasks: self.get_existing_tasks(rtxn, ids)?,
index_uid,
},
must_create_index,
})),
BatchKind::DocumentOperation { method, operation_ids, .. } => {
let tasks = self.get_existing_tasks(rtxn, operation_ids)?;
let primary_key = tasks
.iter()
.find_map(|task| match task.kind {
KindWithContent::DocumentAdditionOrUpdate { ref primary_key, .. } => {
// we want to stop on the first document addition
Some(primary_key.clone())
}
KindWithContent::DocumentDeletion { .. } => None,
_ => unreachable!(),
})
.flatten();
let mut documents_counts = Vec::new();
let mut operations = Vec::new();
for task in tasks.iter() {
match task.kind {
KindWithContent::DocumentAdditionOrUpdate {
content_file,
documents_count,
..
} => {
documents_counts.push(documents_count);
operations.push(DocumentOperation::Add(content_file));
}
KindWithContent::DocumentDeletion { ref documents_ids, .. } => {
documents_counts.push(documents_ids.len() as u64);
operations.push(DocumentOperation::Delete(documents_ids.clone()));
}
_ => unreachable!(),
}
}
Ok(Some(Batch::IndexOperation {
op: IndexOperation::DocumentOperation {
index_uid,
primary_key,
method,
documents_counts,
operations,
tasks,
},
must_create_index,
}))
}
BatchKind::DocumentDeletion { deletion_ids } => {
let tasks = self.get_existing_tasks(rtxn, deletion_ids)?;
let mut documents = Vec::new();
for task in &tasks {
match task.kind {
KindWithContent::DocumentDeletion { ref documents_ids, .. } => {
documents.push(documents_ids.clone())
}
_ => unreachable!(),
}
}
Ok(Some(Batch::IndexOperation {
op: IndexOperation::DocumentDeletion { index_uid, documents, tasks },
must_create_index,
}))
}
BatchKind::Settings { settings_ids, .. } => {
let tasks = self.get_existing_tasks(rtxn, settings_ids)?;
let mut settings = Vec::new();
for task in &tasks {
match task.kind {
KindWithContent::SettingsUpdate {
ref new_settings, is_deletion, ..
} => settings.push((is_deletion, *new_settings.clone())),
_ => unreachable!(),
}
}
Ok(Some(Batch::IndexOperation {
op: IndexOperation::Settings { index_uid, settings, tasks },
must_create_index,
}))
}
BatchKind::ClearAndSettings { other, settings_ids, allow_index_creation } => {
let (index_uid, settings, settings_tasks) = match self
.create_next_batch_index(
rtxn,
index_uid,
BatchKind::Settings { settings_ids, allow_index_creation },
must_create_index,
)?
.unwrap()
{
Batch::IndexOperation {
op: IndexOperation::Settings { index_uid, settings, tasks, .. },
..
} => (index_uid, settings, tasks),
_ => unreachable!(),
};
let (index_uid, cleared_tasks) = match self
.create_next_batch_index(
rtxn,
index_uid,
BatchKind::DocumentClear { ids: other },
must_create_index,
)?
.unwrap()
{
Batch::IndexOperation {
op: IndexOperation::DocumentClear { index_uid, tasks },
..
} => (index_uid, tasks),
_ => unreachable!(),
};
Ok(Some(Batch::IndexOperation {
op: IndexOperation::DocumentClearAndSetting {
index_uid,
cleared_tasks,
settings,
settings_tasks,
},
must_create_index,
}))
}
BatchKind::SettingsAndDocumentOperation {
settings_ids,
method,
allow_index_creation,
primary_key,
operation_ids,
} => {
let settings = self.create_next_batch_index(
rtxn,
index_uid.clone(),
BatchKind::Settings { settings_ids, allow_index_creation },
must_create_index,
)?;
let document_import = self.create_next_batch_index(
rtxn,
index_uid.clone(),
BatchKind::DocumentOperation {
method,
allow_index_creation,
primary_key,
operation_ids,
},
must_create_index,
)?;
match (document_import, settings) {
(
Some(Batch::IndexOperation {
op:
IndexOperation::DocumentOperation {
primary_key,
documents_counts,
operations,
tasks: document_import_tasks,
..
},
..
}),
Some(Batch::IndexOperation {
op: IndexOperation::Settings { settings, tasks: settings_tasks, .. },
..
}),
) => Ok(Some(Batch::IndexOperation {
op: IndexOperation::SettingsAndDocumentOperation {
index_uid,
primary_key,
method,
documents_counts,
operations,
document_import_tasks,
settings,
settings_tasks,
},
must_create_index,
})),
_ => unreachable!(),
}
}
BatchKind::IndexCreation { id } => {
let task = self.get_task(rtxn, id)?.ok_or(Error::CorruptedTaskQueue)?;
let (index_uid, primary_key) = match &task.kind {
KindWithContent::IndexCreation { index_uid, primary_key } => {
(index_uid.clone(), primary_key.clone())
}
_ => unreachable!(),
};
Ok(Some(Batch::IndexCreation { index_uid, primary_key, task }))
}
BatchKind::IndexUpdate { id } => {
let task = self.get_task(rtxn, id)?.ok_or(Error::CorruptedTaskQueue)?;
let primary_key = match &task.kind {
KindWithContent::IndexUpdate { primary_key, .. } => primary_key.clone(),
_ => unreachable!(),
};
Ok(Some(Batch::IndexUpdate { index_uid, primary_key, task }))
}
BatchKind::IndexDeletion { ids } => Ok(Some(Batch::IndexDeletion {
index_uid,
index_has_been_created: must_create_index,
tasks: self.get_existing_tasks(rtxn, ids)?,
})),
BatchKind::IndexSwap { id } => {
let task = self.get_task(rtxn, id)?.ok_or(Error::CorruptedTaskQueue)?;
Ok(Some(Batch::IndexSwap { task }))
}
}
}
/// Create the next batch to be processed;
/// 1. We get the *last* task to cancel.
/// 2. We get the *next* task to delete.
/// 3. We get the *next* snapshot to process.
/// 4. We get the *next* dump to process.
/// 5. We get the *next* tasks to process for a specific index.
pub(crate) fn create_next_batch(&self, rtxn: &RoTxn) -> Result<Option<Batch>> {
#[cfg(test)]
self.maybe_fail(crate::tests::FailureLocation::InsideCreateBatch)?;
let enqueued = &self.get_status(rtxn, Status::Enqueued)?;
let to_cancel = self.get_kind(rtxn, Kind::TaskCancelation)? & enqueued;
// 1. we get the last task to cancel.
if let Some(task_id) = to_cancel.max() {
// We retrieve the tasks that were processing before this tasks cancelation started.
// We must *not* reset the processing tasks before calling this method.
let ProcessingTasks { started_at, processing } =
&*self.processing_tasks.read().unwrap();
return Ok(Some(Batch::TaskCancelation {
task: self.get_task(rtxn, task_id)?.ok_or(Error::CorruptedTaskQueue)?,
previous_started_at: *started_at,
previous_processing_tasks: processing.clone(),
}));
}
// 2. we get the next task to delete
let to_delete = self.get_kind(rtxn, Kind::TaskDeletion)? & enqueued;
if let Some(task_id) = to_delete.min() {
let task = self.get_task(rtxn, task_id)?.ok_or(Error::CorruptedTaskQueue)?;
return Ok(Some(Batch::TaskDeletion(task)));
}
// 3. we batch the snapshot.
let to_snapshot = self.get_kind(rtxn, Kind::SnapshotCreation)? & enqueued;
if !to_snapshot.is_empty() {
return Ok(Some(Batch::SnapshotCreation(self.get_existing_tasks(rtxn, to_snapshot)?)));
}
// 4. we batch the dumps.
let to_dump = self.get_kind(rtxn, Kind::DumpCreation)? & enqueued;
if let Some(to_dump) = to_dump.min() {
return Ok(Some(Batch::Dump(
self.get_task(rtxn, to_dump)?.ok_or(Error::CorruptedTaskQueue)?,
)));
}
// 5. We make a batch from the unprioritised tasks. Start by taking the next enqueued task.
let task_id = if let Some(task_id) = enqueued.min() { task_id } else { return Ok(None) };
let task = self.get_task(rtxn, task_id)?.ok_or(Error::CorruptedTaskQueue)?;
// If the task is not associated with any index, verify that it is an index swap and
// create the batch directly. Otherwise, get the index name associated with the task
// and use the autobatcher to batch the enqueued tasks associated with it
let index_name = if let Some(&index_name) = task.indexes().first() {
index_name
} else {
assert!(matches!(&task.kind, KindWithContent::IndexSwap { swaps } if swaps.is_empty()));
return Ok(Some(Batch::IndexSwap { task }));
};
let index_already_exists = self.index_mapper.exists(rtxn, index_name)?;
let mut primary_key = None;
if index_already_exists {
let index = self.index_mapper.index(rtxn, index_name)?;
let rtxn = index.read_txn()?;
primary_key = index.primary_key(&rtxn)?.map(|pk| pk.to_string());
}
let index_tasks = self.index_tasks(rtxn, index_name)? & enqueued;
// If autobatching is disabled we only take one task at a time.
let tasks_limit = if self.autobatching_enabled { usize::MAX } else { 1 };
let enqueued = index_tasks
.into_iter()
.take(tasks_limit)
.map(|task_id| {
self.get_task(rtxn, task_id)
.and_then(|task| task.ok_or(Error::CorruptedTaskQueue))
.map(|task| (task.uid, task.kind))
})
.collect::<Result<Vec<_>>>()?;
if let Some((batchkind, create_index)) =
autobatcher::autobatch(enqueued, index_already_exists, primary_key.as_deref())
{
return self.create_next_batch_index(
rtxn,
index_name.to_string(),
batchkind,
create_index,
);
}
// If we found no tasks then we were notified for something that got autobatched
// somehow and there is nothing to do.
Ok(None)
}
/// Apply the operation associated with the given batch.
///
/// ## Return
/// The list of tasks that were processed. The metadata of each task in the returned
/// list is updated accordingly, with the exception of the its date fields
/// [`finished_at`](meilisearch_types::tasks::Task::finished_at) and [`started_at`](meilisearch_types::tasks::Task::started_at).
pub(crate) fn process_batch(&self, batch: Batch) -> Result<Vec<Task>> {
#[cfg(test)]
{
self.maybe_fail(crate::tests::FailureLocation::InsideProcessBatch)?;
self.maybe_fail(crate::tests::FailureLocation::PanicInsideProcessBatch)?;
self.breakpoint(crate::Breakpoint::InsideProcessBatch);
}
match batch {
Batch::TaskCancelation { mut task, previous_started_at, previous_processing_tasks } => {
// 1. Retrieve the tasks that matched the query at enqueue-time.
let matched_tasks =
if let KindWithContent::TaskCancelation { tasks, query: _ } = &task.kind {
tasks
} else {
unreachable!()
};
let mut wtxn = self.env.write_txn()?;
let canceled_tasks_content_uuids = self.cancel_matched_tasks(
&mut wtxn,
task.uid,
matched_tasks,
previous_started_at,
&previous_processing_tasks,
)?;
task.status = Status::Succeeded;
match &mut task.details {
Some(Details::TaskCancelation {
matched_tasks: _,
canceled_tasks,
original_filter: _,
}) => {
*canceled_tasks = Some(canceled_tasks_content_uuids.len() as u64);
}
_ => unreachable!(),
}
// We must only remove the content files if the transaction is successfully committed
// and if errors occurs when we are deleting files we must do our best to delete
// everything. We do not return the encountered errors when deleting the content
// files as it is not a breaking operation and we can safely continue our job.
match wtxn.commit() {
Ok(()) => {
for content_uuid in canceled_tasks_content_uuids {
if let Err(error) = self.delete_update_file(content_uuid) {
error!(
"We failed deleting the content file indentified as {}: {}",
content_uuid, error
)
}
}
}
Err(e) => return Err(e.into()),
}
Ok(vec![task])
}
Batch::TaskDeletion(mut task) => {
// 1. Retrieve the tasks that matched the query at enqueue-time.
let matched_tasks =
if let KindWithContent::TaskDeletion { tasks, query: _ } = &task.kind {
tasks
} else {
unreachable!()
};
let mut wtxn = self.env.write_txn()?;
let deleted_tasks_count = self.delete_matched_tasks(&mut wtxn, matched_tasks)?;
task.status = Status::Succeeded;
match &mut task.details {
Some(Details::TaskDeletion {
matched_tasks: _,
deleted_tasks,
original_filter: _,
}) => {
*deleted_tasks = Some(deleted_tasks_count);
}
_ => unreachable!(),
}
wtxn.commit()?;
Ok(vec![task])
}
Batch::SnapshotCreation(mut tasks) => {
fs::create_dir_all(&self.snapshots_path)?;
let temp_snapshot_dir = tempfile::tempdir()?;
// 1. Snapshot the version file.
let dst = temp_snapshot_dir.path().join(VERSION_FILE_NAME);
fs::copy(&self.version_file_path, dst)?;
// 2. Snapshot the index-scheduler LMDB env
//
// When we call copy_to_path, LMDB opens a read transaction by itself,
// we can't provide our own. It is an issue as we would like to know
// the update files to copy but new ones can be enqueued between the copy
// of the env and the new transaction we open to retrieve the enqueued tasks.
// So we prefer opening a new transaction after copying the env and copy more
// update files than not enough.
//
// Note that there cannot be any update files deleted between those
// two read operations as the task processing is synchronous.
// 2.1 First copy the LMDB env of the index-scheduler
let dst = temp_snapshot_dir.path().join("tasks");
fs::create_dir_all(&dst)?;
self.env.copy_to_path(dst.join("data.mdb"), CompactionOption::Enabled)?;
// 2.2 Create a read transaction on the index-scheduler
let rtxn = self.env.read_txn()?;
// 2.3 Create the update files directory
let update_files_dir = temp_snapshot_dir.path().join("update_files");
fs::create_dir_all(&update_files_dir)?;
// 2.4 Only copy the update files of the enqueued tasks
for task_id in self.get_status(&rtxn, Status::Enqueued)? {
let task = self.get_task(&rtxn, task_id)?.ok_or(Error::CorruptedTaskQueue)?;
if let Some(content_uuid) = task.content_uuid() {
let src = self.file_store.get_update_path(content_uuid);
let dst = update_files_dir.join(content_uuid.to_string());
fs::copy(src, dst)?;
}
}
// 3. Snapshot every indexes
for result in self.index_mapper.index_mapping.iter(&rtxn)? {
let (name, uuid) = result?;
let index = self.index_mapper.index(&rtxn, name)?;
let dst = temp_snapshot_dir.path().join("indexes").join(uuid.to_string());
fs::create_dir_all(&dst)?;
index.copy_to_path(dst.join("data.mdb"), CompactionOption::Enabled)?;
}
drop(rtxn);
// 4. Snapshot the auth LMDB env
let dst = temp_snapshot_dir.path().join("auth");
fs::create_dir_all(&dst)?;
// TODO We can't use the open_auth_store_env function here but we should
let auth = milli::heed::EnvOpenOptions::new()
.map_size(1024 * 1024 * 1024) // 1 GiB
.max_dbs(2)
.open(&self.auth_path)?;
auth.copy_to_path(dst.join("data.mdb"), CompactionOption::Enabled)?;
// 5. Copy and tarball the flat snapshot
// 5.1 Find the original name of the database
// TODO find a better way to get this path
let mut base_path = self.env.path().to_owned();
base_path.pop();
let db_name = base_path.file_name().and_then(OsStr::to_str).unwrap_or("data.ms");
// 5.2 Tarball the content of the snapshot in a tempfile with a .snapshot extension
let snapshot_path = self.snapshots_path.join(format!("{}.snapshot", db_name));
let temp_snapshot_file = tempfile::NamedTempFile::new_in(&self.snapshots_path)?;
compression::to_tar_gz(temp_snapshot_dir.path(), temp_snapshot_file.path())?;
let file = temp_snapshot_file.persist(snapshot_path)?;
// 5.3 Change the permission to make the snapshot readonly
let mut permissions = file.metadata()?.permissions();
permissions.set_readonly(true);
#[cfg(unix)]
{
use std::os::unix::fs::PermissionsExt;
#[allow(clippy::non_octal_unix_permissions)]
// rwxrwxrwx
permissions.set_mode(0b100100100);
}
file.set_permissions(permissions)?;
for task in &mut tasks {
task.status = Status::Succeeded;
}
Ok(tasks)
}
Batch::Dump(mut task) => {
let started_at = OffsetDateTime::now_utc();
let (keys, instance_uid) =
if let KindWithContent::DumpCreation { keys, instance_uid } = &task.kind {
(keys, instance_uid)
} else {
unreachable!();
};
let dump = dump::DumpWriter::new(*instance_uid)?;
// 1. dump the keys
let mut dump_keys = dump.create_keys()?;
for key in keys {
dump_keys.push_key(key)?;
}
dump_keys.flush()?;
let rtxn = self.env.read_txn()?;
// 2. dump the tasks
let mut dump_tasks = dump.create_tasks_queue()?;
for ret in self.all_tasks.iter(&rtxn)? {
let (_, mut t) = ret?;
let status = t.status;
let content_file = t.content_uuid();
// In the case we're dumping ourselves we want to be marked as finished
// to not loop over ourselves indefinitely.
if t.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.
t.status = Status::Succeeded;
t.started_at = Some(started_at);
t.finished_at = Some(finished_at);
}
let mut dump_content_file = dump_tasks.push_task(&t.into())?;
// 2.1. Dump the `content_file` associated with the task if there is one and the task is not finished yet.
if let Some(content_file) = content_file {
if status == Status::Enqueued {
let content_file = self.file_store.get_update(content_file)?;
let reader = DocumentsBatchReader::from_reader(content_file)
.map_err(milli::Error::from)?;
let (mut cursor, documents_batch_index) =
reader.into_cursor_and_fields_index();
while let Some(doc) =
cursor.next_document().map_err(milli::Error::from)?
{
dump_content_file.push_document(&obkv_to_object(
&doc,
&documents_batch_index,
)?)?;
}
dump_content_file.flush()?;
}
}
}
dump_tasks.flush()?;
// 3. Dump the indexes
self.index_mapper.try_for_each_index(&rtxn, |uid, index| -> Result<()> {
let rtxn = index.read_txn()?;
let metadata = IndexMetadata {
uid: uid.to_owned(),
primary_key: index.primary_key(&rtxn)?.map(String::from),
created_at: index.created_at(&rtxn)?,
updated_at: index.updated_at(&rtxn)?,
};
let mut index_dumper = dump.create_index(uid, &metadata)?;
let fields_ids_map = index.fields_ids_map(&rtxn)?;
let all_fields: Vec<_> = fields_ids_map.iter().map(|(id, _)| id).collect();
// 3.1. Dump the documents
for ret in index.all_documents(&rtxn)? {
let (_id, doc) = ret?;
let document = milli::obkv_to_json(&all_fields, &fields_ids_map, doc)?;
index_dumper.push_document(&document)?;
}
// 3.2. Dump the settings
let settings = meilisearch_types::settings::settings(index, &rtxn)?;
index_dumper.settings(&settings)?;
Ok(())
})?;
let dump_uid = started_at.format(format_description!(
"[year repr:full][month repr:numerical][day padding:zero]-[hour padding:zero][minute padding:zero][second padding:zero][subsecond digits:3]"
)).unwrap();
let path = self.dumps_path.join(format!("{}.dump", dump_uid));
let file = File::create(path)?;
dump.persist_to(BufWriter::new(file))?;
// if we reached this step we can tell the scheduler we succeeded to dump ourselves.
task.status = Status::Succeeded;
task.details = Some(Details::Dump { dump_uid: Some(dump_uid) });
Ok(vec![task])
}
Batch::IndexOperation { op, must_create_index } => {
let index_uid = op.index_uid().to_string();
let index = if must_create_index {
// create the index if it doesn't already exist
let wtxn = self.env.write_txn()?;
self.index_mapper.create_index(wtxn, &index_uid, None)?
} else {
let rtxn = self.env.read_txn()?;
self.index_mapper.index(&rtxn, &index_uid)?
};
let mut index_wtxn = index.write_txn()?;
let tasks = self.apply_index_operation(&mut index_wtxn, &index, op)?;
index_wtxn.commit()?;
// if the update processed successfully, we're going to store the new
// stats of the index. Since the tasks have already been processed and
// this is a non-critical operation. If it fails, we should not fail
// the entire batch.
let res = || -> Result<()> {
let index_rtxn = index.read_txn()?;
let stats = crate::index_mapper::IndexStats::new(&index, &index_rtxn)?;
let mut wtxn = self.env.write_txn()?;
self.index_mapper.store_stats_of(&mut wtxn, &index_uid, &stats)?;
wtxn.commit()?;
Ok(())
}();
match res {
Ok(_) => (),
Err(e) => error!("Could not write the stats of the index {}", e),
}
Ok(tasks)
}
Batch::IndexCreation { index_uid, primary_key, task } => {
let wtxn = self.env.write_txn()?;
if self.index_mapper.exists(&wtxn, &index_uid)? {
return Err(Error::IndexAlreadyExists(index_uid));
}
self.index_mapper.create_index(wtxn, &index_uid, None)?;
self.process_batch(Batch::IndexUpdate { index_uid, primary_key, task })
}
Batch::IndexUpdate { index_uid, primary_key, mut task } => {
let rtxn = self.env.read_txn()?;
let index = self.index_mapper.index(&rtxn, &index_uid)?;
if let Some(primary_key) = primary_key.clone() {
let mut index_wtxn = index.write_txn()?;
let mut builder = MilliSettings::new(
&mut index_wtxn,
&index,
self.index_mapper.indexer_config(),
);
builder.set_primary_key(primary_key);
let must_stop_processing = self.must_stop_processing.clone();
builder.execute(
|indexing_step| debug!("update: {:?}", indexing_step),
|| must_stop_processing.get(),
)?;
index_wtxn.commit()?;
}
// drop rtxn before starting a new wtxn on the same db
rtxn.commit()?;
task.status = Status::Succeeded;
task.details = Some(Details::IndexInfo { primary_key });
// if the update processed successfully, we're going to store the new
// stats of the index. Since the tasks have already been processed and
// this is a non-critical operation. If it fails, we should not fail
// the entire batch.
let res = || -> Result<()> {
let mut wtxn = self.env.write_txn()?;
let index_rtxn = index.read_txn()?;
let stats = crate::index_mapper::IndexStats::new(&index, &index_rtxn)?;
self.index_mapper.store_stats_of(&mut wtxn, &index_uid, &stats)?;
wtxn.commit()?;
Ok(())
}();
match res {
Ok(_) => (),
Err(e) => error!("Could not write the stats of the index {}", e),
}
Ok(vec![task])
}
Batch::IndexDeletion { index_uid, index_has_been_created, mut tasks } => {
let wtxn = self.env.write_txn()?;
// it's possible that the index doesn't exist
let number_of_documents = || -> Result<u64> {
let index = self.index_mapper.index(&wtxn, &index_uid)?;
let index_rtxn = index.read_txn()?;
Ok(index.number_of_documents(&index_rtxn)?)
}()
.unwrap_or_default();
// The write transaction is directly owned and commited inside.
match self.index_mapper.delete_index(wtxn, &index_uid) {
Ok(()) => (),
Err(Error::IndexNotFound(_)) if index_has_been_created => (),
Err(e) => return Err(e),
}
// We set all the tasks details to the default value.
for task in &mut tasks {
task.status = Status::Succeeded;
task.details = match &task.kind {
KindWithContent::IndexDeletion { .. } => {
Some(Details::ClearAll { deleted_documents: Some(number_of_documents) })
}
otherwise => otherwise.default_finished_details(),
};
}
Ok(tasks)
}
Batch::IndexSwap { mut task } => {
let mut wtxn = self.env.write_txn()?;
let swaps = if let KindWithContent::IndexSwap { swaps } = &task.kind {
swaps
} else {
unreachable!()
};
let mut not_found_indexes = BTreeSet::new();
for IndexSwap { indexes: (lhs, rhs) } in swaps {
for index in [lhs, rhs] {
let index_exists = self.index_mapper.index_exists(&wtxn, index)?;
if !index_exists {
not_found_indexes.insert(index);
}
}
}
if !not_found_indexes.is_empty() {
if not_found_indexes.len() == 1 {
return Err(Error::SwapIndexNotFound(
not_found_indexes.into_iter().next().unwrap().clone(),
));
} else {
return Err(Error::SwapIndexesNotFound(
not_found_indexes.into_iter().cloned().collect(),
));
}
}
for swap in swaps {
self.apply_index_swap(&mut wtxn, task.uid, &swap.indexes.0, &swap.indexes.1)?;
}
wtxn.commit()?;
task.status = Status::Succeeded;
Ok(vec![task])
}
}
}
/// Swap the index `lhs` with the index `rhs`.
fn apply_index_swap(&self, wtxn: &mut RwTxn, task_id: u32, lhs: &str, rhs: &str) -> Result<()> {
// 1. Verify that both lhs and rhs are existing indexes
let index_lhs_exists = self.index_mapper.index_exists(wtxn, lhs)?;
if !index_lhs_exists {
return Err(Error::IndexNotFound(lhs.to_owned()));
}
let index_rhs_exists = self.index_mapper.index_exists(wtxn, rhs)?;
if !index_rhs_exists {
return Err(Error::IndexNotFound(rhs.to_owned()));
}
// 2. Get the task set for index = name that appeared before the index swap task
let mut index_lhs_task_ids = self.index_tasks(wtxn, lhs)?;
index_lhs_task_ids.remove_range(task_id..);
let mut index_rhs_task_ids = self.index_tasks(wtxn, rhs)?;
index_rhs_task_ids.remove_range(task_id..);
// 3. before_name -> new_name in the task's KindWithContent
for task_id in &index_lhs_task_ids | &index_rhs_task_ids {
let mut task = self.get_task(wtxn, task_id)?.ok_or(Error::CorruptedTaskQueue)?;
swap_index_uid_in_task(&mut task, (lhs, rhs));
self.all_tasks.put(wtxn, &BEU32::new(task_id), &task)?;
}
// 4. remove the task from indexuid = before_name
// 5. add the task to indexuid = after_name
self.update_index(wtxn, lhs, |lhs_tasks| {
*lhs_tasks -= &index_lhs_task_ids;
*lhs_tasks |= &index_rhs_task_ids;
})?;
self.update_index(wtxn, rhs, |rhs_tasks| {
*rhs_tasks -= &index_rhs_task_ids;
*rhs_tasks |= &index_lhs_task_ids;
})?;
// 6. Swap in the index mapper
self.index_mapper.swap(wtxn, lhs, rhs)?;
Ok(())
}
/// Process the index operation on the given index.
///
/// ## Return
/// The list of processed tasks.
fn apply_index_operation<'i>(
&self,
index_wtxn: &mut RwTxn<'i, '_>,
index: &'i Index,
operation: IndexOperation,
) -> Result<Vec<Task>> {
match operation {
IndexOperation::DocumentClear { mut tasks, .. } => {
let count = milli::update::ClearDocuments::new(index_wtxn, index).execute()?;
let mut first_clear_found = false;
for task in &mut tasks {
task.status = Status::Succeeded;
// The first document clear will effectively delete every documents
// in the database but the next ones will clear 0 documents.
task.details = match &task.kind {
KindWithContent::DocumentClear { .. } => {
let count = if first_clear_found { 0 } else { count };
first_clear_found = true;
Some(Details::ClearAll { deleted_documents: Some(count) })
}
otherwise => otherwise.default_details(),
};
}
Ok(tasks)
}
IndexOperation::DocumentOperation {
index_uid: _,
primary_key,
method,
documents_counts: _,
operations,
mut tasks,
} => {
let mut primary_key_has_been_set = false;
let must_stop_processing = self.must_stop_processing.clone();
let indexer_config = self.index_mapper.indexer_config();
if let Some(primary_key) = primary_key {
match index.primary_key(index_wtxn)? {
// if a primary key was set AND had already been defined in the index
// but to a different value, we can make the whole batch fail.
Some(pk) => {
if primary_key != pk {
return Err(milli::Error::from(
milli::UserError::PrimaryKeyCannotBeChanged(pk.to_string()),
)
.into());
}
}
// if the primary key was set and there was no primary key set for this index
// we set it to the received value before starting the indexing process.
None => {
let mut builder =
milli::update::Settings::new(index_wtxn, index, indexer_config);
builder.set_primary_key(primary_key);
builder.execute(
|indexing_step| debug!("update: {:?}", indexing_step),
|| must_stop_processing.clone().get(),
)?;
primary_key_has_been_set = true;
}
}
}
let config = IndexDocumentsConfig { update_method: method, ..Default::default() };
let mut builder = milli::update::IndexDocuments::new(
index_wtxn,
index,
indexer_config,
config,
|indexing_step| debug!("update: {:?}", indexing_step),
|| must_stop_processing.get(),
)?;
for (operation, task) in operations.into_iter().zip(tasks.iter_mut()) {
match operation {
DocumentOperation::Add(content_uuid) => {
let content_file = self.file_store.get_update(content_uuid)?;
let reader = DocumentsBatchReader::from_reader(content_file)
.map_err(milli::Error::from)?;
let (new_builder, user_result) = builder.add_documents(reader)?;
builder = new_builder;
let received_documents =
if let Some(Details::DocumentAdditionOrUpdate {
received_documents,
..
}) = task.details
{
received_documents
} else {
// In the case of a `documentAdditionOrUpdate` the details MUST be set
unreachable!();
};
match user_result {
Ok(count) => {
task.status = Status::Succeeded;
task.details = Some(Details::DocumentAdditionOrUpdate {
received_documents,
indexed_documents: Some(count),
})
}
Err(e) => {
task.status = Status::Failed;
task.details = Some(Details::DocumentAdditionOrUpdate {
received_documents,
indexed_documents: Some(0),
});
task.error = Some(milli::Error::from(e).into());
}
}
}
DocumentOperation::Delete(document_ids) => {
let (new_builder, user_result) =
builder.remove_documents(document_ids)?;
builder = new_builder;
let provided_ids =
if let Some(Details::DocumentDeletion { provided_ids, .. }) =
task.details
{
provided_ids
} else {
// In the case of a `documentAdditionOrUpdate` the details MUST be set
unreachable!();
};
match user_result {
Ok(count) => {
task.status = Status::Succeeded;
task.details = Some(Details::DocumentDeletion {
provided_ids,
deleted_documents: Some(count),
});
}
Err(e) => {
task.status = Status::Failed;
task.details = Some(Details::DocumentDeletion {
provided_ids,
deleted_documents: Some(0),
});
task.error = Some(milli::Error::from(e).into());
}
}
}
}
}
if !tasks.iter().all(|res| res.error.is_some()) {
let addition = builder.execute()?;
info!("document addition done: {:?}", addition);
} else if primary_key_has_been_set {
// Everything failed but we've set a primary key.
// We need to remove it.
let mut builder =
milli::update::Settings::new(index_wtxn, index, indexer_config);
builder.reset_primary_key();
builder.execute(
|indexing_step| debug!("update: {:?}", indexing_step),
|| must_stop_processing.clone().get(),
)?;
}
Ok(tasks)
}
IndexOperation::DocumentDeletion { index_uid: _, documents, mut tasks } => {
let mut builder = milli::update::DeleteDocuments::new(index_wtxn, index)?;
documents.iter().flatten().for_each(|id| {
builder.delete_external_id(id);
});
let DocumentDeletionResult { deleted_documents, .. } = builder.execute()?;
for (task, documents) in tasks.iter_mut().zip(documents) {
task.status = Status::Succeeded;
task.details = Some(Details::DocumentDeletion {
provided_ids: documents.len(),
deleted_documents: Some(deleted_documents.min(documents.len() as u64)),
});
}
Ok(tasks)
}
IndexOperation::Settings { index_uid: _, settings, mut tasks } => {
let indexer_config = self.index_mapper.indexer_config();
let mut builder = milli::update::Settings::new(index_wtxn, index, indexer_config);
for (task, (_, settings)) in tasks.iter_mut().zip(settings) {
let checked_settings = settings.clone().check();
task.details = Some(Details::SettingsUpdate { settings: Box::new(settings) });
apply_settings_to_builder(&checked_settings, &mut builder);
// We can apply the status right now and if an update fail later
// the whole batch will be marked as failed.
task.status = Status::Succeeded;
}
let must_stop_processing = self.must_stop_processing.clone();
builder.execute(
|indexing_step| debug!("update: {:?}", indexing_step),
|| must_stop_processing.get(),
)?;
Ok(tasks)
}
IndexOperation::SettingsAndDocumentOperation {
index_uid,
primary_key,
method,
documents_counts,
operations,
document_import_tasks,
settings,
settings_tasks,
} => {
let settings_tasks = self.apply_index_operation(
index_wtxn,
index,
IndexOperation::Settings {
index_uid: index_uid.clone(),
settings,
tasks: settings_tasks,
},
)?;
let mut import_tasks = self.apply_index_operation(
index_wtxn,
index,
IndexOperation::DocumentOperation {
index_uid,
primary_key,
method,
documents_counts,
operations,
tasks: document_import_tasks,
},
)?;
let mut tasks = settings_tasks;
tasks.append(&mut import_tasks);
Ok(tasks)
}
IndexOperation::DocumentClearAndSetting {
index_uid,
cleared_tasks,
settings,
settings_tasks,
} => {
let mut import_tasks = self.apply_index_operation(
index_wtxn,
index,
IndexOperation::DocumentClear {
index_uid: index_uid.clone(),
tasks: cleared_tasks,
},
)?;
let settings_tasks = self.apply_index_operation(
index_wtxn,
index,
IndexOperation::Settings { index_uid, settings, tasks: settings_tasks },
)?;
let mut tasks = settings_tasks;
tasks.append(&mut import_tasks);
Ok(tasks)
}
}
}
/// Delete each given task from all the databases (if it is deleteable).
///
/// Return the number of tasks that were actually deleted.
fn delete_matched_tasks(&self, wtxn: &mut RwTxn, matched_tasks: &RoaringBitmap) -> Result<u64> {
// 1. Remove from this list the tasks that we are not allowed to delete
let enqueued_tasks = self.get_status(wtxn, Status::Enqueued)?;
let processing_tasks = &self.processing_tasks.read().unwrap().processing.clone();
let all_task_ids = self.all_task_ids(wtxn)?;
let mut to_delete_tasks = all_task_ids & matched_tasks;
to_delete_tasks -= processing_tasks;
to_delete_tasks -= enqueued_tasks;
// 2. We now have a list of tasks to delete, delete them
let mut affected_indexes = HashSet::new();
let mut affected_statuses = HashSet::new();
let mut affected_kinds = HashSet::new();
let mut affected_canceled_by = RoaringBitmap::new();
for task_id in to_delete_tasks.iter() {
let task = self.get_task(wtxn, task_id)?.ok_or(Error::CorruptedTaskQueue)?;
affected_indexes.extend(task.indexes().into_iter().map(|x| x.to_owned()));
affected_statuses.insert(task.status);
affected_kinds.insert(task.kind.as_kind());
// Note: don't delete the persisted task data since
// we can only delete succeeded, failed, and canceled tasks.
// In each of those cases, the persisted data is supposed to
// have been deleted already.
utils::remove_task_datetime(wtxn, self.enqueued_at, task.enqueued_at, task.uid)?;
if let Some(started_at) = task.started_at {
utils::remove_task_datetime(wtxn, self.started_at, started_at, task.uid)?;
}
if let Some(finished_at) = task.finished_at {
utils::remove_task_datetime(wtxn, self.finished_at, finished_at, task.uid)?;
}
if let Some(canceled_by) = task.canceled_by {
affected_canceled_by.insert(canceled_by);
}
}
for index in affected_indexes {
self.update_index(wtxn, &index, |bitmap| *bitmap -= &to_delete_tasks)?;
}
for status in affected_statuses {
self.update_status(wtxn, status, |bitmap| *bitmap -= &to_delete_tasks)?;
}
for kind in affected_kinds {
self.update_kind(wtxn, kind, |bitmap| *bitmap -= &to_delete_tasks)?;
}
for task in to_delete_tasks.iter() {
self.all_tasks.delete(wtxn, &BEU32::new(task))?;
}
for canceled_by in affected_canceled_by {
let canceled_by = BEU32::new(canceled_by);
if let Some(mut tasks) = self.canceled_by.get(wtxn, &canceled_by)? {
tasks -= &to_delete_tasks;
if tasks.is_empty() {
self.canceled_by.delete(wtxn, &canceled_by)?;
} else {
self.canceled_by.put(wtxn, &canceled_by, &tasks)?;
}
}
}
Ok(to_delete_tasks.len())
}
/// Cancel each given task from all the databases (if it is cancelable).
///
/// Returns the content files that the transaction owner must delete if the commit is successful.
fn cancel_matched_tasks(
&self,
wtxn: &mut RwTxn,
cancel_task_id: TaskId,
matched_tasks: &RoaringBitmap,
previous_started_at: OffsetDateTime,
previous_processing_tasks: &RoaringBitmap,
) -> Result<Vec<Uuid>> {
let now = OffsetDateTime::now_utc();
// 1. Remove from this list the tasks that we are not allowed to cancel
// Notice that only the _enqueued_ ones are cancelable and we should
// have already aborted the indexation of the _processing_ ones
let cancelable_tasks = self.get_status(wtxn, Status::Enqueued)?;
let tasks_to_cancel = cancelable_tasks & matched_tasks;
// 2. We now have a list of tasks to cancel, cancel them
let mut content_files_to_delete = Vec::new();
for mut task in self.get_existing_tasks(wtxn, tasks_to_cancel.iter())? {
if let Some(uuid) = task.content_uuid() {
content_files_to_delete.push(uuid);
}
if previous_processing_tasks.contains(task.uid) {
task.started_at = Some(previous_started_at);
}
task.status = Status::Canceled;
task.canceled_by = Some(cancel_task_id);
task.finished_at = Some(now);
task.details = task.details.map(|d| d.to_failed());
self.update_task(wtxn, &task)?;
}
self.canceled_by.put(wtxn, &BEU32::new(cancel_task_id), &tasks_to_cancel)?;
Ok(content_files_to_delete)
}
}