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From Ted Dunning <ted.dunn...@gmail.com>
Subject Re: Zookeeper/Hbase storage type on EC2
Date Mon, 25 Jul 2011 16:56:41 GMT
There is some persistent data.

It is just that it can be reconstructed.

This very felicitous fact is why snapshots work for free with MapR.  If
there were critical data in ZK, it would be considerably more ticklish to
get a clean snap.

On Mon, Jul 25, 2011 at 9:33 AM, Patrick Hunt <phunt@apache.org> wrote:

> I was under the impression that there was some persistent data kept in
> ZK by hbase, good to know. Perhaps a FAQ entry for this?
>
> Patrick
>
> On Fri, Jul 22, 2011 at 10:42 PM, Andrew Purtell <apurtell@apache.org>
> wrote:
> > HBase does not keep any persistent state in ZooKeeper.
> >
> > You can restart your ZK cluster one peer at a time without affecting
> HBase.
> >
> > If you are going to bring your entire ZK cluster down, first shut down
> HBase. Then once ZK is started again, bring up HBase.
>

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