Mark blob files not needed by any memtables/SSTs obsolete#6032

Closed

ltamasi wants to merge 12 commits intofacebook:masterfrom ltamasi:blob_db_obsolete_files

+404-81

Commits on Nov 14, 2019

Commits on Nov 18, 2019

Keep track of the sequence number at which a blob file was marked immutable, cleanups (initialize obsolete_sequence_ in ctor, remove unused member)
ltamasi
committed
Keep track of largest flushed sequence number, do not obsolete blob file if the sequence number at which it was marked immutable has not been flushed yet
ltamasi
committed
Call MarkUnreferencedBlobFilesObsolete on flushes as well
ltamasi
committed
Add immutable_sequence param to TEST_AddDummyBlobFile
ltamasi
committed
Check for potentially obsolete files upon each flush (even if the new file does not reference any blob files)
ltamasi
committed
Extend unit test
ltamasi
committed
Rework and simplify locking in logic that reacts to flushes/compactions, add comments
ltamasi
committed
Update a few comments
ltamasi
committed
Update one more comment
ltamasi
committed