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From Ted Dunning <tdunn...@maprtech.com>
Subject Re: hadoop / hbase /zookeeper architecture for best performance
Date Tue, 21 Jun 2011 14:44:42 GMT
Why are you running ZK in VM's?

If those VM's are on a smaller number of machines, then you are making your
failure modes worse, not better.

Zookeeper is very well behaved and should normally be run as a bare process.
 You can migrate/upgrade the cluster at will and you can have several ZK
clusters on the same set of machines if you need to.

For Hbase, I don't think you need to since you can root the hbase info in
different locations in the same ZK cluster.

On Tue, Jun 21, 2011 at 9:18 AM, Mingjian Deng <koven2049@gmail.com> wrote:

>  In our cluster, we have 43 nodes with 3 clusters. Two of them have 10
> regionservers and datanodes nodes and another has 20 regionservers and
> datanodes. And all the 3 clusters use 1 zookeeper cluster with 5 nodes
> running in virtual machines.

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