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Posted to commits@cassandra.apache.org by "Jonathan Ellis (JIRA)" <ji...@apache.org> on 2010/10/01 22:45:34 UTC
[jira] Updated: (CASSANDRA-1293) add locking around row cache
accesses
[ https://issues.apache.org/jira/browse/CASSANDRA-1293?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jonathan Ellis updated CASSANDRA-1293:
--------------------------------------
Attachment: 1293.txt
We expect to save [cache hit rate] of a read per write with write-through, since the alternative is to invalidate the cached row at write time and reload it when it's requested again.
Attached patch moves the cache udpate into CFS.apply.
> add locking around row cache accesses
> -------------------------------------
>
> Key: CASSANDRA-1293
> URL: https://issues.apache.org/jira/browse/CASSANDRA-1293
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Reporter: Jonathan Ellis
> Priority: Minor
> Fix For: 0.7.0
>
> Attachments: 1293.txt
>
>
> CASSANDRA-1267 means we need to lock around removeDeleted on the row cache entry and the write path where we merge in new columns (otherwise there can be a race where we incorrectly continue to remove a column, that has been updated by the writer thread to be newly relevant)
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