Hi Guys, Thank you very much for you reply.
The scenario which i have to implement is that i have 2 sites not datacenters so mirror maker would not work here. There will be 4 nodes in total, like 2 in Site A and 2 in Site B. The idea is to have Active-Active setup along with fault tolerance so that if one of the site goes on the operations are normal. In this case if i go ahead with 4 node-cluster of both zookeeper and kafka it will give failover tolerance for 1 node only. What do you suggest to do in this case ? because to divide between 2 sites it needs to be even number if that makes sense ? Also if possible some help regarding partitions for topic and replication factor. I already have Kafka running with quiet few topics having replication factor 1 along with 1 default partition, is there a way to repartition / increase partition of existing topics when i migrate to above setup ? I think we can increase replication factor by Kafka rebalance tool. Thanks alot for your help and time looking into this. BR, Le On Mon, Mar 6, 2017 at 12:20 PM, Hans Jespersen <h...@confluent.io> wrote: > Jens, > > I think you are correct that a 4 node zookeeper ensemble can be made to > work but it will be slightly less resilient than a 3 node ensemble because > it can only tolerate 1 failure (same as a 3 node ensemble) and the > likelihood of node failures is higher because there is 1 more node that > could fail. > So it SHOULD be an odd number of zookeeper nodes (not MUST). > > -hans > > > > On Mar 6, 2017, at 12:20 AM, Jens Rantil <jens.ran...@tink.se> wrote: > > > > Hi Hans, > > > >> On Mon, Mar 6, 2017 at 12:10 AM, Hans Jespersen <h...@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.ran...@tink.se > > Phone: +46 708 84 18 32 > > Web: www.tink.se > > > > Facebook <https://www.facebook.com/#!/tink.se> Linkedin > > <http://www.linkedin.com/company/2735919?trk=vsrp_ > companies_res_photo&trkInfo=VSRPsearchId%3A1057023381369207406670% > 2CVSRPtargetId%3A2735919%2CVSRPcmpt%3Aprimary> > > Twitter <https://twitter.com/tink> >
