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From Jens Rantil <jens.ran...@tink.se>
Subject Re: Having 4 Node Kafka Cluster
Date Mon, 06 Mar 2017 08:20:34 GMT
Hi Hans,

On Mon, Mar 6, 2017 at 12:10 AM, Hans Jespersen <hans@confluent.io> wrote:

> A 4 node zookeeper ensemble will not even work. It MUST be an odd number
> of zookeeper nodes to start.


Are you sure about that? If Zookeer doesn't run with four nodes, that means
a running ensemble of three can't be live-migrated to other nodes (because
that's done by increasing the ensemble and then reducing it in the case of
3-node ensembles). IIRC, you can run four Zookeeper nodes, but that means
quorum will be three nodes, so there's no added benefit in terms of
availability since you can only loose one node just like with a three node
cluster.

Cheers,
Jens


-- 
Jens Rantil
Backend engineer
Tink AB

Email: jens.rantil@tink.se
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