FYI - This manual reordering of the DCs and RACs might make it easier to see how the tokens are arranged. Pretty sure that the token ranges are picked correctly. Ignore the Owns column, b/c it is not multi-datacenter aware (so it thinks all of the nodes are in one ring as opposed to two (DC1 & DC2).
Here is what the nodetool ring output looked like before we replaced the 1st node (643 GB) with new hardware. After running repair on it, for some reason, to our dismay, it re-spawned as a 900+ GB node. Address DC Rack Status State Load Owns Token 148873535527910577765226390751398592512 10.192.143.x DC1 RAC1 Up Normal 643.42 GB 12.50% 0 10.192.171.x DC1 RAC1 Up Normal 128.96 GB 6.25% 21267647932558653966460912964485513216 10.210.95.x DC1 RAC1 Up Normal 128.34 GB 12.50% 42535295865117307932921825928971026432 10.211.19.x DC1 RAC1 Up Normal 128.55 GB 6.25% 63802943797675961899382738893456539648 10.68.58.x DC1 RAC2 Up Normal 643.05 GB 12.50% 85070591730234615865843651857942052864 10.110.31.x DC1 RAC2 Up Normal 128.84 GB 6.25% 106338239662793269832304564822427566080 10.96.58.x DC1 RAC2 Up Normal 128.11 GB 12.50% 127605887595351923798765477786913079296 10.210.195.x DC1 RAC2 Up Normal 129.33 GB 6.25% 148873535527910577765226390751398592512 10.114.138.x DC2 RAC1 Up Normal 258.04 GB 6.25% 10633823966279326983230456482242756608 10.203.79.x DC2 RAC1 Up Normal 257.14 GB 6.25% 53169119831396634916152282411213783040 10.242.209.x DC2 RAC1 Up Normal 256.58 GB 6.25% 95704415696513942849074108340184809472 10.38.25.x DC2 RAC1 Up Normal 257.08 GB 6.25% 138239711561631250781995934269155835904 On Mon, Jul 18, 2011 at 5:23 PM, <tamara.alexan...@accenture.com> wrote: > We’re running brisk v1 beta2 on 12 nodes – 8 cassandra in DC1 and 4 brisk > in DC 2 in EC2. Wrote a few TBs of data to the cluster, and unfortunately > the load is very unbalanced. Every key is the same size and we are using > RandomPartitioner.**** > > ** ** > > There are two replicas of data in DC1 and one replica in DC2. The load > amount in DC2 makes sense (about 250GB per node). DC1 should also have about > 250GB per node (since there is twice the data and twice the number of > nodes), but as can be seen below two nodes have an inordinate amount of data > and the other 6 have only about 128GB:**** > > ** ** > > Address DC Rack Status State Load > Owns Token **** > > > 148873535527910577765226390751398592512 > **** > > 10.2.206.127 DC1 RAC1 Up Normal 901.6 GB > 12.50% 0 **** > > 10.116.230.151 DC2 RAC1 Up Normal 258.23 GB > 6.25% 10633823966279326983230456482242756608 **** > > 10.110.6.237 DC1 RAC1 Up Normal 129.08 GB > 6.25% 21267647932558653966460912964485513216 **** > > 10.2.38.43 DC1 RAC1 Up Normal 128.51 GB > 12.50% 42535295865117307932921825928971026432 **** > > 10.114.39.110 DC2 RAC1 Up Normal 257.32 GB > 6.25% 53169119831396634916152282411213783040 **** > > 10.210.27.208 DC1 RAC1 Up Normal 128.67 GB > 6.25% 63802943797675961899382738893456539648 **** > > 10.207.39.230 DC1 RAC2 Up Normal 643.14 GB > 12.50% 85070591730234615865843651857942052864 **** > > 10.85.157.77 DC2 RAC1 Up Normal 256.78 GB > 6.25% 95704415696513942849074108340184809472 **** > > 10.2.209.240 DC1 RAC2 Up Normal 128.96 GB > 6.25% 106338239662793269832304564822427566080 **** > > 10.96.74.213 DC1 RAC2 Up Normal 128.3 GB > 12.50% 127605887595351923798765477786913079296 **** > > 10.194.205.155 DC2 RAC1 Up Normal 257.15 GB > 6.25% 138239711561631250781995934269155835904 **** > > 10.201.194.16 DC1 RAC2 Up Normal 129.46 GB > 6.25% 148873535527910577765226390751398592512 **** > > ** ** > > I should also node that the first node used to have 640GB of load until the > instance went down and we needed to run repair on a new instance in its > place.**** > > ** ** > > Any ideas why this may have happened?**** > > ** ** > > Thanks,**** > > Tamara**** > > ------------------------------ > This message is for the designated recipient only and may contain > privileged, proprietary, or otherwise private information. If you have > received it in error, please notify the sender immediately and delete the > original. Any other use of the email by you is prohibited. >
