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Posted to commits@cassandra.apache.org by "Sylvain Lebresne (JIRA)" <ji...@apache.org> on 2011/03/12 12:23:59 UTC
[jira] Resolved: (CASSANDRA-2305) Tombstoned rows not purged from
cache after gcgraceseconds
[ https://issues.apache.org/jira/browse/CASSANDRA-2305?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sylvain Lebresne resolved CASSANDRA-2305.
-----------------------------------------
Resolution: Fixed
Remarking this resolved, the follow up is in CASSANDRA-2317 instead.
> Tombstoned rows not purged from cache after gcgraceseconds
> ----------------------------------------------------------
>
> Key: CASSANDRA-2305
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2305
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Affects Versions: 0.7.0
> Reporter: Jeffrey Wang
> Assignee: Sylvain Lebresne
> Priority: Minor
> Fix For: 0.7.4
>
> Attachments: 0001-Compaction-test.patch, 0002-Invalidate-row-cache-on-compaction-purge.patch
>
> Original Estimate: 2h
> Time Spent: 2h
> Remaining Estimate: 0h
>
> From email to list:
> I was wondering if this is the expected behavior of deletes (0.7.0). Let's say I have a 1-node cluster with a single CF which has gc_grace_seconds = 0. The following sequence of operations happens (in the given order):
> insert row X with timestamp T
> delete row X with timestamp T+1
> force flush + compaction
> insert row X with timestamp T
> My understanding is that the tombstone created by the delete (and row X) will disappear with the flush + compaction which means the last insertion should show up. My experimentation, however, suggests otherwise (the last insertion does not show up).
> I believe I have traced this to the fact that the markedForDeleteAt field on the ColumnFamily does not get reset after a compaction (after gc_grace_seconds has passed); is this desirable? I think it introduces an inconsistency in how tombstoned columns work versus tombstoned CFs. Thanks.
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