[HDDS-11075] Move SstFiltered flag to another SnapshotProperties table

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Resolved
• Component/s: Ozone Manager
• Assignee: Swaminathan Balachandran
• Reporter: Swaminathan Balachandran
• Created: 27/Jun/24 10:47
• Updated: 27/Jun/24 19:23
• Resolved: 27/Jun/24 19:23

Description

SstFiltering service directly updates the snapshotInfo and doesn't go through DoubleBufferFlush to update the DB. This interferes with SnapshotInfo updated during SnapshotPurgeRequest.

Consider the case:

S1 <- S2(SstFiltered) <- S3 (Sst unfiltered)

At T1 if S2 is purged and submitted to OM ratis but it hasn't been flushed to the rocksDb but just present in the cache which makes the chain.

S1 <- S3 (Sst Unfiltered in cache)

S2(SstFiltered, deleted in Cache but present in table)

 

Suppose at T2  SstFiltering service runs on the chain and marks S3 to be SstFiltered which would be directly flushed to DB

S1 <- S3 (Sst filtered in DB)

S1 <- S2 (Present in DB but not present in cache)

Now if the OM is restarted, snapshot chain would have gotten corrupted since both S2 & S3 are pointing S1 in the DB.

Issue Links

• duplicates: HDDS-11068 OM down to Snapshot Chain Corruption