1e40696dd1
Summary: When a WAL is synced, an edit is written to MANIFEST. After flushing memtables, the obsoleted WALs are piggybacked to MANIFEST while writing the new L0 files to MANIFEST. Pull Request resolved: https://github.com/facebook/rocksdb/pull/7601 Test Plan: `track_and_verify_wals_in_manifest` is enabled by default for all tests extending `DBBasicTest`, and in db_stress_test. Unit test `wal_edit_test`, `version_edit_test`, and `version_set_test` are also updated. Watch all tests to pass. Reviewed By: ltamasi Differential Revision: D24553957 Pulled By: cheng-chang fbshipit-source-id: 66a569ff1bdced38e22900bd240b73113906e040