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Code Issues Releases Wiki Activity

re-implement the snapshot import at startup

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This commit is contained in:
Tamo 2023-11-07 14:15:57 +01:00
parent c48f72e6b8
commit 1585b3ed2f
1 changed files with 28 additions and 3 deletions
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31
index-scheduler/src/lib.rs
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@ -477,7 +477,7 @@ impl IndexScheduler {
log::info!("Entering the election game with the ID: {id}"); log::info!("Entering the election game with the ID: {id}");
// there is at least us in the childrens of election // there is at least us in the childrens of election
if childrens[0].ends_with(&string_id) { let cluster = if childrens[0].ends_with(&string_id) {
log::warn!("I'm the leader"); log::warn!("I'm the leader");
None None
} else { } else {
@ -495,8 +495,29 @@ impl IndexScheduler {
let watchers = zk.multi_watcher([leader_watcher, snapshot_watcher]); let watchers = zk.multi_watcher([leader_watcher, snapshot_watcher]);
Some((zk, string_id, watchers)) Some((zk.clone(), string_id, watchers))
};
log::info!("Checking if there is are snapshots already available to load");
let mut snapshots = zk.list_children("/snapshots").unwrap();
snapshots.sort_unstable();
let mut loaded_something = false;
for snapshot in snapshots.into_iter().rev() {
log::info!("Checking if the snapshot `{snapshot}` is ready to be imported");
if zk.get_data(&format!("/snapshots/{snapshot}")).unwrap().0 == b"ok" {
log::info!("It is ready to import");
loaded_something = true;
load_snapshot(self, format!("snapshots/{snapshot}")).unwrap();
} else {
log::info!("Not ready");
}
} }
if !loaded_something {
log::info!("No snapshots to import");
}
cluster
} }
None => None, None => None,
}; };
@ -905,7 +926,8 @@ impl IndexScheduler {
} }
} }
fn load_snapshot(this: &IndexScheduler, path: &str) -> anyhow::Result<()> { fn load_snapshot(this: &IndexScheduler, path: impl AsRef<str>) -> anyhow::Result<()> {
let path = path.as_ref();
log::info!("Importing snapshot {}", path); log::info!("Importing snapshot {}", path);
let inner = this.inner(); let inner = this.inner();
@ -954,6 +976,7 @@ fn load_snapshot(this: &IndexScheduler, path: &str) -> anyhow::Result<()> {
pfcs.push(raw_inner.env.prepare_for_closing()); pfcs.push(raw_inner.env.prepare_for_closing());
pfcs.into_iter().for_each(|pfc| pfc.wait()); pfcs.into_iter().for_each(|pfc| pfc.wait());
log::info!("Replacing all the databases in place");
// Let's replace all the folders/files. // Let's replace all the folders/files.
std::fs::rename(&tasks_file, base_path.join("tasks").join("data.mdb"))?; std::fs::rename(&tasks_file, base_path.join("tasks").join("data.mdb"))?;
let dst_indexes = base_path.join("indexes"); let dst_indexes = base_path.join("indexes");
@ -973,6 +996,8 @@ fn load_snapshot(this: &IndexScheduler, path: &str) -> anyhow::Result<()> {
inner.wake_up = raw_inner.wake_up; inner.wake_up = raw_inner.wake_up;
*lock = Some(inner); *lock = Some(inner);
log::info!("Snapshot import finished");
Ok(()) Ok(())
} }