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Zookeeper >> mail # user >> Adding nodes to an ensemble


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Jordan Zimmerman 2011-08-12, 18:21
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RE: Adding nodes to an ensemble
Hi,

Currently you have to restart the nodes to change the configuration (rolling restart, i.e., every time you bring nodes up after changing the cfg files you must ensure that a quorum of the old config intersects with any quorum of the new config). We're working on doing this dynamically and will hopefully add this feature to the next release after 3.4.  This allows to add/remove machines, change observers to followers and vice versa and change leader election and following ports, automatically without any restarts.

Regards,
Alex

> -----Original Message-----
> From: Jordan Zimmerman [mailto:[EMAIL PROTECTED]]
> Sent: Friday, August 12, 2011 11:21 AM
> To: [EMAIL PROTECTED]
> Subject: Adding nodes to an ensemble
>
> It seems implicit in the docs that it's not possible to add nodes (even
> Observers) to an existing ensemble without restarting each node in the
> ensemble. i.e. The zoo.cfg has to be changed for each node. Is this
> true?
> Is there any work being done on a broadcast protocol that doesn't
> require
> static config?
>
> -JZ
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Vishal Kher 2011-08-12, 20:10