-
Notifications
You must be signed in to change notification settings - Fork 409
New issue
Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.
By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.
Already on GitHub? Sign in to your account
Skip deletion of safekeeper data if done previously. #6766
base: main
Are you sure you want to change the base?
Conversation
2466 tests run: 2345 passed, 0 failed, 121 skipped (full report)Code coverage* (full report)
* collected from Rust tests only The comment gets automatically updated with the latest test results
f08493f at 2024-02-22T21:45:34.314Z :recycle: |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
LGTM
safekeeper/src/timeline.rs
Outdated
@@ -116,6 +116,9 @@ pub struct SharedState { | |||
/// when tli is inactive instead of having this flag. | |||
active: bool, | |||
last_removed_segno: XLogSegNo, | |||
/// True if local and remote deletion has been done, allows to skip visiting | |||
/// s3 on retries. | |||
deleted: bool, |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
Let's rename this to fully_deleted
maybe, to hint that deletion is not instant and can take some time.
Also, I think it will be better to move this flag to timelines_global_map.rs
eventually, so maybe let's add a todo for that here. I'll create an issue for better deletion handling meanwhile.
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
Renamed. WDYT about renaming 'cancelled' to 'deleted' then?
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
Not now, maybe later. Currently cancelled
is another flag which is set as early as possible after receiving deletion request.
To avoid re-listing s3 data during retries of tenant deletion with many branches.
8c6fea9
to
f08493f
Compare
Alternative: #8253 |
## Problem Safekeepers left running for a long time use a lot of memory (up to the point of OOMing, on small nodes) for deleted timelines, because the `Timeline` struct is kept alive as a guard against recreating deleted timelines. Closes: #6810 ## Summary of changes - Create separate tombstones that just record a ttid and when the timeline was deleted. - Add a periodic housekeeping task that cleans up tombstones older than a hardcoded TTL (24h) I think this also makes #6766 un-needed, as the tombstone is also checked during deletion. I considered making the overall timeline map use an enum type containing active or deleted, but having a separate map of tombstones avoids bloating that map, so that calls like `get()` can still go straight to a timeline without having to walk a hashmap that also contains tombstones.
## Problem Safekeepers left running for a long time use a lot of memory (up to the point of OOMing, on small nodes) for deleted timelines, because the `Timeline` struct is kept alive as a guard against recreating deleted timelines. Closes: #6810 ## Summary of changes - Create separate tombstones that just record a ttid and when the timeline was deleted. - Add a periodic housekeeping task that cleans up tombstones older than a hardcoded TTL (24h) I think this also makes #6766 un-needed, as the tombstone is also checked during deletion. I considered making the overall timeline map use an enum type containing active or deleted, but having a separate map of tombstones avoids bloating that map, so that calls like `get()` can still go straight to a timeline without having to walk a hashmap that also contains tombstones.
## Problem Safekeepers left running for a long time use a lot of memory (up to the point of OOMing, on small nodes) for deleted timelines, because the `Timeline` struct is kept alive as a guard against recreating deleted timelines. Closes: #6810 ## Summary of changes - Create separate tombstones that just record a ttid and when the timeline was deleted. - Add a periodic housekeeping task that cleans up tombstones older than a hardcoded TTL (24h) I think this also makes #6766 un-needed, as the tombstone is also checked during deletion. I considered making the overall timeline map use an enum type containing active or deleted, but having a separate map of tombstones avoids bloating that map, so that calls like `get()` can still go straight to a timeline without having to walk a hashmap that also contains tombstones.
## Problem Safekeepers left running for a long time use a lot of memory (up to the point of OOMing, on small nodes) for deleted timelines, because the `Timeline` struct is kept alive as a guard against recreating deleted timelines. Closes: #6810 ## Summary of changes - Create separate tombstones that just record a ttid and when the timeline was deleted. - Add a periodic housekeeping task that cleans up tombstones older than a hardcoded TTL (24h) I think this also makes #6766 un-needed, as the tombstone is also checked during deletion. I considered making the overall timeline map use an enum type containing active or deleted, but having a separate map of tombstones avoids bloating that map, so that calls like `get()` can still go straight to a timeline without having to walk a hashmap that also contains tombstones.
## Problem Safekeepers left running for a long time use a lot of memory (up to the point of OOMing, on small nodes) for deleted timelines, because the `Timeline` struct is kept alive as a guard against recreating deleted timelines. Closes: #6810 ## Summary of changes - Create separate tombstones that just record a ttid and when the timeline was deleted. - Add a periodic housekeeping task that cleans up tombstones older than a hardcoded TTL (24h) I think this also makes #6766 un-needed, as the tombstone is also checked during deletion. I considered making the overall timeline map use an enum type containing active or deleted, but having a separate map of tombstones avoids bloating that map, so that calls like `get()` can still go straight to a timeline without having to walk a hashmap that also contains tombstones.
## Problem Safekeepers left running for a long time use a lot of memory (up to the point of OOMing, on small nodes) for deleted timelines, because the `Timeline` struct is kept alive as a guard against recreating deleted timelines. Closes: #6810 ## Summary of changes - Create separate tombstones that just record a ttid and when the timeline was deleted. - Add a periodic housekeeping task that cleans up tombstones older than a hardcoded TTL (24h) I think this also makes #6766 un-needed, as the tombstone is also checked during deletion. I considered making the overall timeline map use an enum type containing active or deleted, but having a separate map of tombstones avoids bloating that map, so that calls like `get()` can still go straight to a timeline without having to walk a hashmap that also contains tombstones.
## Problem Safekeepers left running for a long time use a lot of memory (up to the point of OOMing, on small nodes) for deleted timelines, because the `Timeline` struct is kept alive as a guard against recreating deleted timelines. Closes: #6810 ## Summary of changes - Create separate tombstones that just record a ttid and when the timeline was deleted. - Add a periodic housekeeping task that cleans up tombstones older than a hardcoded TTL (24h) I think this also makes #6766 un-needed, as the tombstone is also checked during deletion. I considered making the overall timeline map use an enum type containing active or deleted, but having a separate map of tombstones avoids bloating that map, so that calls like `get()` can still go straight to a timeline without having to walk a hashmap that also contains tombstones.
To avoid re-listing s3 data during retries of tenant deletion with many branches.