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From Patrick Hunt <ph...@apache.org>
Subject Re: ZK on EC2
Date Tue, 10 Nov 2009 19:27:50 GMT
Can you elaborate on "gc tuning" - you are using the incremental collector?


Ted Dunning wrote:
> The server side is a fairly standard (but old) config:
> tickTime=2000
> dataDir=/home/zookeeper/
> clientPort=2181
> initLimit=5
> syncLimit=2
> Most of our clients now use 5 seconds as the timeout, but I think that we
> went to longer timeouts in the past.  Without digging in to determine the
> truth of the matter, my guess is that we needed the longer timeouts before
> we tuned the GC parameters and that after tuning GC, we were able to return
> to a more reasonable timeout.  In retrospect, I think that we blamed EC2 for
> some of our own GC misconfiguration.
> I would not use our configuration here as canonical since we didn't apply a
> whole lot of brainpower to this problem.
> On Tue, Nov 10, 2009 at 9:29 AM, Patrick Hunt <phunt@apache.org> wrote:
>> Ted, could you provide your configuration information for the cluster (incl
>> the client timeout you use), if you're willing I'd be happy to put this up
>> on the wiki for others interested in running in EC2.

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