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https://issues.apache.org/jira/browse/CASSANDRA-2305?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13004960#comment-13004960
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Jeffrey Wang commented on CASSANDRA-2305:
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For a little more info, I think this only happens when you remove an entire
row. If you delete specific columns, the tombstones are handled appropriately.
> Tombstoned CFs not reset after compaction
> -----------------------------------------
>
> 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
>
> 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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