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
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