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From Alexander Shraer <shra...@yahoo-inc.com>
Subject RE: Growing a cluster
Date Thu, 05 May 2011 04:02:54 GMT
Hi Jared,

Currently there is no support for adding and removing zookeeper nodes dynamically. See:
https://issues.apache.org/jira/browse/ZOOKEEPER-107

We're currently working to add this feature. However, AFAIK there is no intention to support
transformation between standalone and multi-node modes, only membership changes in multi-node
mode.

Regards,
Alex


> -----Original Message-----
> From: Jared Cantwell [mailto:jared.cantwell@gmail.com]
> Sent: Wednesday, May 04, 2011 7:17 PM
> To: zookeeper-user@hadoop.apache.org
> Subject: Growing a cluster
> 
> Hello,
> 
> Say I was going to grow a cluster from 1 node to 3 nodes.  Is this
> possible,
> and what would be the recommended way?
> 
> At first I was thinking that I could go from 1 to 2 and then 2 to 3,
> and it
> seems to be working actually.  But I'm not sure if this is supported,
> mostly
> because in standalone mode the on-disk files are different than they
> are in
> a multi-node configurations.  Mutli-node configurations embed the
> quorum
> incarnation into the filename, which standalone does not.  Should a
> quorum
> node be able to startup using snapshots and logs that a standalone node
> wrote out?  Is there a way around this?
> 
> Thanks,
> Jared

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