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Posted to commits@cassandra.apache.org by "Jonathan Ellis (JIRA)" <ji...@apache.org> on 2012/04/24 16:39:35 UTC
[jira] [Resolved] (CASSANDRA-2470) Secondary Indexes Build Very
Slowly
[ https://issues.apache.org/jira/browse/CASSANDRA-2470?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jonathan Ellis resolved CASSANDRA-2470.
---------------------------------------
Resolution: Duplicate
closing in favor of the above specific improvements
> Secondary Indexes Build Very Slowly
> -----------------------------------
>
> Key: CASSANDRA-2470
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2470
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Benjamin Coverston
> Labels: repair, secondary_index
>
> While running repair I noticed that the time it took to run was easily dominated by building the secondary indexes. They currently build at a rate of < 200KB/Second. This means that indexing a 500MB file takes nearly an hour to index the file.
> Because this happens on the compaction thread it also causes repair to back up in general, which for very active systems is a very bad thing.
> I suggest we look at it in the hope that we can improve the rate in which we build the indexes by an order of magnitude.
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