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From James Golick <jamesgol...@gmail.com>
Subject Failover and slow nodes
Date Fri, 18 Jun 2010 15:21:54 GMT
Our cassandra client fails over if a node times out. Aside from actual
failure, repair and major compactions can make a node so slow that it
affects application performance.

One problem we've run in to is that a node in the midst of repair will still
have requests routed to it internally, even if all clients have failed over.
With a small number of nodes, this has a major impact on the performance of
the overall system.

I'm wondering whether people have any recommendations on tuning this
behaviour. It would be really nice not to route requests to an insanely slow
node.

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