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From Brandon Williams <dri...@gmail.com>
Subject Re: Cassandra operation success ratio survey results
Date Tue, 21 Sep 2010 20:29:59 GMT
On Tue, Sep 21, 2010 at 8:29 AM, Juho Mäkinen <juho.makinen@gmail.com>wrote:

> It's known that compaction hurts the node performance so that it might
> miss some requests. That's why it's important to handle these
> situations and the client needs to retry the operation into another
> working host. We have been storing performance data from each
> cassandra request which we do into our five node cassandra production
> cluster.
>

You should enable the dynamic snitch, since it's designed to route around
nodes that are not performing well, due to compaction or other problems:
https://issues.apache.org/jira/browse/CASSANDRA-981

Also, reducing the compaction thread's priority is a good idea:
https://issues.apache.org/jira/browse/CASSANDRA-1181

These are on by default in 0.7, but require additional JVM args in 0.6

-Brandon

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