Re: What is the recommended number of zookeeper server on 11 nodes cluster

[Bennett Andrews <be...@gmail.com>]

Running 2 ZooKeeper's isn't a good idea as it doesn't handle any server
failure. ZooKeeper needs a majority of nodes in the ensemble to be available
to handle failures. So 1,3,5 are better choices.


See:
http://wiki.apache.org/hadoop/ZooKeeper/FAQ#A7
http://zookeeper.apache.org/doc/r3.3.3/zookeeperAdmin.html#sc_zkMulitServerSetup
<http://zookeeper.apache.org/doc/r3.3.3/zookeeperAdmin.html#sc_zkMulitServerSetup>



On Wed, May 11, 2011 at 11:18 AM, Doug Meil
<do...@explorysmedical.com>wrote:

> See the performance section of the HBase book.
>
> http://hbase.apache.org/book.html#performance
>
>
> -----Original Message-----
> From: Ferdy Galema [mailto:ferdy.galema@kalooga.com]
> Sent: Wednesday, May 11, 2011 10:25 AM
> To: user@hbase.apache.org
> Cc: byambajargal; cdh-user@cloudera.org
> Subject: Re: What is the recommended number of zookeeper server on 11 nodes
> cluster
>
> A rowcounter is a scan job, so you should use hbase.client.scanner.caching
> for better scan performance. (Depending on your value sizes, set to 1000 or
> something like that).
>
> For us, 1 zookeeper is able to manage our 15node cluster perfectly fine.
>
> On 05/11/2011 02:40 PM, byambajargal wrote:
> > Hello everybody
> >
> > I have run  a cluster with 11 nodes hbase CDH3u0 and i have 2
> > zookeeper server in my cluster It seems very slowly when i run the
> > rowcounter example my question is what is the recommended number of
> > zookeeper server should i run for 11 nodes cluster
> >
> > cheers
> >
> >
> > Byambajargal
>