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From Manosiz Bhattacharyya <manos...@gmail.com>
Subject Re: Timeouts and ping handling
Date Thu, 19 Jan 2012 18:48:16 GMT
We are using the zookeeper c client version 3.3.4 the same as the server.
We use libptread-2.10.1.so, and no special time slicing in user code. Will
let you know what we find.


On Thu, Jan 19, 2012 at 10:09 AM, Patrick Hunt <phunt@apache.org> wrote:

> On Thu, Jan 19, 2012 at 9:31 AM, Manosiz Bhattacharyya
> <manosizb@gmail.com> wrote:
> > I do not think that there is a problem with the queue size. I guess the
> > problem is more with latency when the Fusion I/O goes in for a GC. We are
> > enabling stats on the Zookeeper and the fusion I/O to be more precise.
> Does
> > Zookeeper typically do only sequential I/O, or does it do some random
> too.
> > We could then move the logs to a disk.
> I was going to say what Ted said - it's odd to see such long pauses
> given you don't have GC issues and you are barely using the system.
> Your suspicion on disk may be correct.
> The server really just does sequential IO - it's writing the WAL for
> any changes and periodically taking the snapshot.
> Note that this could be an issue in ZK itself. The c client talking to
> the service using async operations with such low round trip
> expectations is not something we typically see or in particular test.
> It will be interesting to see the results of your further
> investigations.
> Btw, you are using c client - which version? the pthreads version or
> the version where you manage timeslicing yourself?
> Patrick

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