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From Bryan Keller <brya...@gmail.com>
Subject Re: Small cluster setup
Date Tue, 19 Jun 2012 21:08:19 GMT
I was trying to keep costs down as much as possible. Adding an 11th node just for Zookeeper
seems a bit expensive.

On Jun 19, 2012, at 1:45 PM, Mikael Sitruk wrote:

> you should not put ZK server on the RS or data nodes, since you don't want
> their work to interfere ZK responsiveness.
> You can put ZK on any lightweigth server like HMaster, NN.
> I use almost same configuration as yours: 10 Region Server + DataNode+ Task
> Tracker, 1HMaster + ZK, 1NameNone + JobTracker + ZK, 1 ZK alone.
> 
> Mikael.S
> 
> On Tue, Jun 19, 2012 at 11:27 PM, Bryan Keller <bryanck@gmail.com> wrote:
> 
>> I have a small cluster with 10 nodes. 8 nodes are datanodes/regionservers,
>> and 2 nodes are running HA namenodes and HMaster. The question I have is,
>> what would be the best way to configure Zookeeper in my cluster? Currently
>> I have it running on one of the HMaster nodes. Running an instance on the
>> other HMaster node seems somewhat pointless as I need at least 3 nodes for
>> failover. Should I run Zookeeper on the other HMaster node and a 3rd
>> Zookeeper on one of the regionservers? What are the performance
>> implications of running Zookeeper on a regionserver?
>> 
>> 


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