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Posted to commits@cassandra.apache.org by "Brandon Williams (JIRA)" <ji...@apache.org> on 2010/11/10 00:14:24 UTC
[jira] Commented: (CASSANDRA-1719) improve read repair
[ https://issues.apache.org/jira/browse/CASSANDRA-1719?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12930346#action_12930346 ]
Brandon Williams commented on CASSANDRA-1719:
---------------------------------------------
I get odd behavior testing this patch. Three node cluster, rf=2. I start them up, take one down after the others see it, then insert data. If I read it back with the node down, that works, but when I bring it up all kinds of keys are missing (even though I don't read from it directly.) If I take it back down, everything works again.
> improve read repair
> -------------------
>
> Key: CASSANDRA-1719
> URL: https://issues.apache.org/jira/browse/CASSANDRA-1719
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Jonathan Ellis
> Assignee: Jonathan Ellis
> Priority: Minor
> Fix For: 0.6.8, 0.7.0
>
> Attachments: 1719.txt
>
>
> Read repair recomputes the local digest for each replica, which is a lot of wasted CPU on large reads
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