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From "Stu Hood" <>
Subject Re: Failover and slow nodes
Date Fri, 18 Jun 2010 17:37:58 GMT

-----Original Message-----
From: "Benjamin Black" <>
Sent: Friday, June 18, 2010 12:32pm
Subject: Re: Failover and slow nodes

Would be interesting to have a snitch that manipulated responses for
read nodes based on historical response times.

On Fri, Jun 18, 2010 at 8:21 AM, James Golick <> wrote:
> 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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