Your data model also contributes to the balance (or lack of) of the cluster. If you have a really bad data partitioning Cassandra will not do any magic.
Regarding that cluster, I would decommission the x.52 node and add it again with the correct configuration. After the bootstrap, run a cleanup. If is still that off-balance, you need to look into your data model. Regards, Carlos Juzarte Rolo Cassandra Consultant Pythian - Love your data rolo@pythian | Twitter: cjrolo | Linkedin: *linkedin.com/in/carlosjuzarterolo <http://linkedin.com/in/carlosjuzarterolo>* Mobile: +31 6 159 61 814 | Tel: +1 613 565 8696 x1649 www.pythian.com On Fri, Jun 12, 2015 at 11:58 AM, Jens Rantil <jens.ran...@tink.se> wrote: > Hi, > > I have one node in my 5-node cluster that effectively owns 100% and it > looks like my cluster is rather imbalanced. Is it common to have it this > imbalanced for 4-5 nodes? > > My current output for a keyspace is: > > $ nodetool status myks > Datacenter: Cassandra > ===================== > Status=Up/Down > |/ State=Normal/Leaving/Joining/Moving > -- Address Load Tokens Owns (effective) Host ID > Rack > UN X.X.X.33 203.92 GB 256 41.3% > 871968c9-1d6b-4f06-ba90-8b3a8d92dcf0 RAC1 > UN X.X.X.32 200.44 GB 256 34.2% > d7cacd89-8613-4de5-8a5e-a2c53c41ea45 RAC1 > UN X.X.X.51 197.17 GB 256 100.0% > 344b0adf-2b5d-47c8-8881-9a3f56be6f3b RAC1 > UN X.X.X.52 113.63 GB 1 46.3% > 55daa807-af49-44c5-9742-fe456df621a1 RAC1 > UN X.X.X.31 204.49 GB 256 78.3% > 48cb0782-6c9a-4805-9330-38e192b6b680 RAC1 > > My keyspace has RF=3 and originally I added X.X.X.52 (num_tokens=1 was a > mistake) and then X.X.X.51. I haven't executed `nodetool cleanup` on any > nodes yet. > > For the curious, the full ring can be found here: > https://gist.github.com/JensRantil/57ee515e647e2f154779 > > 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> > -- --
