Hi again, I should also point out that `nodetool ring ...` only has one entry for "X.X.X.4" and that that token range is equally large as the other token ranges for the virtual nodes.
Let me know if you need any more information from me. Cheers, Jens On Sun, Jun 7, 2015 at 11:19 PM, Jens Rantil <[email protected]> wrote: > Hi, > > I had a 3-node (à 256 vnodes each) cluster with RF=3. I mistakenly added a > fourth node with "num_tokens: 1" (that is, one vnode). I've always seen > number of vnodes to be proportional to the amount of data a node would > receive. Therefor, I was expecting the node to receive something like > 1/(1+3*256) of the cluster's data. However, this is not the case: > > $ nodetool status mydatacenter > Datacenter: Cassandra > ===================== > Status=Up/Down > |/ State=Normal/Leaving/Joining/Moving > -- Address Load Tokens Owns (effective) Host ID > Rack > UN X.X.X.2 200.42 GB 256 87.6% > 871968c9-1d6b-4f06-ba90-8b3a8d92dcf0 RAC1 > UN X.X.X.3 198.03 GB 256 53.7% > d7cacd89-8613-4de5-8a5e-a2c53c41ea45 RAC1 > UN X.X.X.4 110.57 GB 1 58.7% > 55daa807-af49-44c5-9742-fe456df621a1 RAC1 > UN X.X.X.5 199.81 GB 256 100.0% > 48cb0782-6c9a-4805-9330-38e192b6b680 RAC1 > > The new node added is "X.X.X.4". Note that I haven't executed `nodetool > cleanup` on the old nodes yet. > > Additional information: > * I am using GossipingPropertyFileSnitch. All nodes are the same > datacenter and rack. > * There are no pending compactions on the node. > > Could anyone explain to me my new node is receiving more data than > expected? Does this have to do with the way the GossipingPropertyFileSnitch > decides where to put secondary/tertiary replicas (ie. always "next physical > node" in ring)? Do I need to execute `nodetool cleanup` also on newly > commissioned nodes? > > Thanks, > Jens > > -- > Jens Rantil > Backend engineer > Tink AB > > Email: [email protected] > 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> > -- Jens Rantil Backend engineer Tink AB Email: [email protected] 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>
