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https://issues.apache.org/jira/browse/ZOOKEEPER-646?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13049315#comment-13049315
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Hari A V commented on ZOOKEEPER-646:
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Hi,
Running multiple ZK instances works. But it comes with more complexity in
process management.
Some cons i can think of are
1. Different clients need to be configured with different Zookeeper ensemble
2. To achieve HA, each application would need at least 3 Zookeepers running.
Even we run multiple Zookeepers in the same machine, number of ZK instances
will be considerably higher resulting in managing more number of processes.
This is inevitable even if we run multiple ensembles as part of the same ZK
Cluster.
- Hari
> Namespace partitioning in ZK
> -----------------------------
>
> Key: ZOOKEEPER-646
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-646
> Project: ZooKeeper
> Issue Type: New Feature
> Reporter: Kay Kay
>
> Tracking JIRA for namespace partitioning in ZK
> From the mailing list (- courtesy: Mahadev / Flavio ) , discussion during Jan
> 2010 -
> "Hi, Mahadev said it all, we have been thinking about it for a while, but
> >> haven't had time to work on it. I also don't think we have a jira open for
> >> it; at least I couldn't find one. But, we did put together some comments:
> >>
> >> http://wiki.apache.org/hadoop/ZooKeeper/PartitionedZookeeper
> >>
> >> One of the main issues we have observed there is that partitioning will
> >> force us to change our consistency guarantees, which is far from ideal.
> >> However, some users seem to be ok with it, but I'm not sure we have
> >> agreement.
> >>
> >> In any case, please feel free to contribute or simply express your
> >> interests so that we can take them into account.
> >>
> >> Thanks,
> >> -Flavio
> >>
> >>
> >> On Jan 15, 2010, at 12:49 AM, Mahadev Konar wrote:
> >>
> > >>> Hi kay,
> > >>> the namespace partitioning in zookeeper has been on a back burner for a
> > >>> long time. There isnt any jira open on it. There had been some
> > >>> discussions
> > >>> on this but no real work. Flavio/Ben have had this on there minds for a
> > >>> while but no real work/proposal is out yet.
> > >>>
> > >>> May I know is this something you are looking for in production?
> > >>>
> > >>> Thanks
> > >>> mahadev
> "
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