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https://github.com/meilisearch/meilisearch.git
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Move the load snapshot step into a function
This commit is contained in:
Clément Renault
parent
f37fdceb15
commit
9b01506cee
@ -403,104 +403,10 @@ impl IndexScheduler {
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}
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WatchedEventType::NodeDataChanged => {
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let path = path.unwrap();
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log::info!("Importing snapshot {}", path);
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let snapshot_id =
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path.strip_prefix("/snapshots/snapshot-").unwrap();
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let snapshot_dir = format!("snapshots/{}", snapshot_id);
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let inner = this.inner();
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let s3 = inner.options.s3.as_ref().unwrap();
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// 1. TODO: Ensure the snapshot version file is the same as our version.
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// 2. Download all the databases
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let base_path = {
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let mut path = inner.env.path().to_path_buf();
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assert!(path.pop());
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path
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};
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let mut tasks_file =
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tempfile::NamedTempFile::new_in(inner.env.path()).unwrap();
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log::info!("Downloading the index scheduler database.");
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let tasks_snapshot = format!("{snapshot_dir}/tasks.mdb");
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let status = s3
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.get_object_to_writer(tasks_snapshot, &mut tasks_file)
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.unwrap();
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assert!(matches!(status, 200 | 202));
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log::info!("Downloading the indexes databases");
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let indexes_files =
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tempfile::TempDir::new_in(&base_path).unwrap();
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let src = format!("{snapshot_dir}/indexes");
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let uuids =
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s3.list(src.clone(), None).unwrap().into_iter().flat_map(
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|lbr| {
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lbr.contents.into_iter().map(|o| {
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let mut iter = o.key.rsplit('.');
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iter.nth(1).unwrap().to_string()
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})
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},
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);
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for uuid in uuids {
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log::info!("\tDownloading the index {}", uuid);
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std::fs::create_dir_all(
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indexes_files.path().join(&uuid).with_extension(""),
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)
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.unwrap();
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let path = indexes_files
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.path()
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.join(&uuid)
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.with_extension("")
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.join("data.mdb");
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let mut file = File::create(path).unwrap();
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s3.get_object_to_writer(
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format!("{src}/{uuid}.mdb"),
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&mut file,
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)
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.unwrap();
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}
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// 3. Lock the index-mapper and close all the env
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drop(inner);
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let mut lock = this.inner.write();
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let mut raw_inner = lock.take().unwrap();
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// Wait for others to finish what they started
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let indexes = raw_inner.index_mapper.clear();
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let mut pfcs: Vec<_> = indexes
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.into_iter()
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.map(|index| index.prepare_for_closing())
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.collect();
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pfcs.push(raw_inner.env.prepare_for_closing());
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pfcs.into_iter().for_each(|pfc| pfc.wait());
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// Let's replace all the folders/files.
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std::fs::rename(
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&tasks_file,
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base_path.join("tasks").join("data.mdb"),
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)
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.unwrap();
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let dst_indexes = base_path.join("indexes");
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std::fs::remove_dir_all(&dst_indexes).unwrap();
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std::fs::create_dir_all(&dst_indexes).unwrap();
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std::fs::rename(indexes_files.into_path(), dst_indexes)
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.unwrap();
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let mut inner = IndexSchedulerInner::new(
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raw_inner.options,
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#[cfg(test)]
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raw_inner.test_breakpoint_sdr,
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#[cfg(test)]
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raw_inner.planned_failures,
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)
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.unwrap();
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// We replace the newly created wake-up signal with the old one
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inner.wake_up = raw_inner.wake_up;
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*lock = Some(inner);
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load_snapshot(&this, &snapshot_dir).unwrap();
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}
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otherwise => panic!("{otherwise:?}"),
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}
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@ -966,6 +872,79 @@ impl IndexScheduler {
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}
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}
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fn load_snapshot(this: &IndexScheduler, path: &str) -> anyhow::Result<()> {
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log::info!("Importing snapshot {}", path);
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let inner = this.inner();
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let s3 = inner.options.s3.as_ref().unwrap();
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// 1. TODO: Ensure the snapshot version file is the same as our version.
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// 2. Download all the databases
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let base_path = {
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let mut path = inner.env.path().to_path_buf();
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assert!(path.pop());
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path
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};
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let mut tasks_file = tempfile::NamedTempFile::new_in(inner.env.path())?;
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log::info!("Downloading the index scheduler database.");
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let tasks_snapshot = format!("{path}/tasks.mdb");
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let status = s3.get_object_to_writer(tasks_snapshot, &mut tasks_file)?;
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assert!(matches!(status, 200 | 202));
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log::info!("Downloading the indexes databases");
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let indexes_files = tempfile::TempDir::new_in(&base_path)?;
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let src = format!("{path}/indexes");
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let uuids = s3.list(src.clone(), None)?.into_iter().flat_map(|lbr| {
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lbr.contents.into_iter().map(|o| {
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let mut iter = o.key.rsplit('.');
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iter.nth(1).unwrap().to_string()
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})
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});
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for uuid in uuids {
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log::info!("\tDownloading the index {}", uuid);
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std::fs::create_dir_all(indexes_files.path().join(&uuid).with_extension(""))?;
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let path = indexes_files.path().join(&uuid).with_extension("").join("data.mdb");
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let mut file = File::create(path)?;
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s3.get_object_to_writer(format!("{src}/{uuid}.mdb"), &mut file)?;
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}
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// 3. Lock the index-mapper and close all the env
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drop(inner);
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let mut lock = this.inner.write();
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let mut raw_inner = lock.take().unwrap();
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// Wait for others to finish what they started
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let indexes = raw_inner.index_mapper.clear();
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let mut pfcs: Vec<_> = indexes.into_iter().map(|index| index.prepare_for_closing()).collect();
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pfcs.push(raw_inner.env.prepare_for_closing());
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pfcs.into_iter().for_each(|pfc| pfc.wait());
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// Let's replace all the folders/files.
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std::fs::rename(&tasks_file, base_path.join("tasks").join("data.mdb"))?;
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let dst_indexes = base_path.join("indexes");
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std::fs::remove_dir_all(&dst_indexes)?;
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std::fs::create_dir_all(&dst_indexes)?;
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std::fs::rename(indexes_files.into_path(), dst_indexes)?;
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let mut inner = IndexSchedulerInner::new(
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raw_inner.options,
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#[cfg(test)]
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raw_inner.test_breakpoint_sdr,
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#[cfg(test)]
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raw_inner.planned_failures,
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)?;
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// We replace the newly created wake-up signal with the old one
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inner.wake_up = raw_inner.wake_up;
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*lock = Some(inner);
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Ok(())
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}
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/// This is the internal structure that keeps the indexes alive.
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pub struct IndexSchedulerInner {
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/// The LMDB environment which the DBs are associated with.
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