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From Florian Leibert <...@leibert.de>
Subject Re: Determine if the distributed mode of ZK functions correctly
Date Tue, 06 Dec 2011 21:26:11 GMT
Where can I find this "srsr" command? It's not part of the zkCli syntax nor
can I find a reference to it...

Thanks,
Florian

On Tue, Dec 6, 2011 at 11:51 AM, Neha Narkhede <neha.narkhede@gmail.com>wrote:

> >> I was wondering if there was an easy way to check if a given zookeeper
> server has joined an ensemble successfully and how many nodes of the
> ensemble are alive.
>
> Today, we do this by relying on the Mode reported by the srvr command. If
> the value is anything other than leader/follower, it is not participating
> in the quorum.
> We simply count the total of leader/follower nodes and ensure that they are
> higher than a threshold.
>
> The downside of this approach is having to run srvr periodically.
>
> Thanks,
> Neha
>
> On Tue, Dec 6, 2011 at 11:44 AM, Florian Leibert <flo@leibert.de> wrote:
>
> > Thanks - though I'll have to have knowledge of the other servers and have
> > to maintain yet another copy of the server-addresses - I wanted to use it
> > within monit to determine if the server is functioning correctly - while
> I
> > of course have to always change the zoo.cnf in case of topology changes,
> I
> > now also have to update my monit scripts to add/remove any servers to use
> > with the smoketest.
> >
> > Too bad ZK doesn't expose via the API a get_ensemble_size ~ that would
> > allow me to alert in case the ensemble is less than X...
> >
> > But this helps!
> >
> > Thanks!
> >
> > On Tue, Dec 6, 2011 at 11:39 AM, Patrick Hunt <phunt@apache.org> wrote:
> >
> > > I created the zk-smoketest project explicitly to help ops with this
> > > problem:
> > > https://github.com/phunt/zk-smoketest
> > >
> > > Patrick
> > >
> > > On Tue, Dec 6, 2011 at 9:39 AM, Florian Leibert <flo@leibert.de>
> wrote:
> > > > Hi -
> > > > I was wondering if there was an easy way to check if a given
> zookeeper
> > > > server has joined an ensemble successfully and how many nodes of the
> > > > ensemble are alive. Of course I could create a test-node on one of
> the
> > > > servers and check the existence on the other ones but wanted to check
> > > first
> > > > if there was another way.
> > > >
> > > > I looked at the client bindings in the python project as well as the
> > ones
> > > > in the ruby project but didn't see that there really was one. I
> > > > specifically want to ensure that the servers are communicating with
> > each
> > > > other and not form "separate" ensembles.
> > > >
> > > > Thanks,
> > > > Florian
> > >
> >
> >
> >
> > --
> > Best regards,
> >
> > Florian
> > http://twitter.com/flo <http://twitter.com/floleibert>
> > http://flori.posterous.com/
> >
>



-- 
Best regards,

Florian
http://twitter.com/flo <http://twitter.com/floleibert>
http://flori.posterous.com/

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