Alexey Kondratov 1e3a6cc813 [pageserver] Do several adjustements to the find_lsn_for_timestamp ...

1. Use `max(find_lsn_for_timestamp, ancestor_lsn)` as a lower boundary
   for search. We use this method to figure out the branching LSN for
   new branch, but GC cutoff could be before branching point and we
   cannot create new branch with LSN < `ancestor_lsn`.

2. Search for the first commit **before** specified timestamp. This
   solves two drawbacks: i) newly created branch won't contain physical
   changes from later commits that will be marked as aborted, and will
   need to be vacuumed away; and ii) we can still figure out a
   reasonable branching LSN if there were no new commits since the
   specified timestamp.

3. Change `get_lsn_by_timestamp` API method to return LSN even if we
   only found commit **before** the specified timestamp.

Resolves #3414

2023-02-22 20:33:05 +01:00

..

benches

feat: LayerMap::replace (#3513)

2023-02-03 15:33:46 +02:00

fixtures

walredo: simple tests and bench updates (#3045)

2023-01-16 18:24:45 +02:00

src

[pageserver] Do several adjustements to the find_lsn_for_timestamp

2023-02-22 20:33:05 +01:00

Cargo.toml

automatic layer eviction

2023-02-09 13:33:55 +01:00