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From Sávio Teles <savio.te...@lupa.inf.ufg.br>
Subject Re: Strange cassandra-stress results with 2.0.0 beta1
Date Thu, 25 Jul 2013 14:28:59 GMT
Some bug was fixed in 2.0.0-beta2 by C* developers. Try it!


2013/7/22 Andrew Cobley <a.e.cobley@dundee.ac.uk>

>  I've been noticing some strange casandra-stress results with 2.0.0 beta
> 1.  I've set up a single node on a Mac (4 gig ram, 2.8Ghz core 2 duo) and
> installed 2.0.0 beta1.
>
> When I run ./cassandra-stress  -d 134.36.36.218 I'm seeing the
> interval-op-rate drop from a peek of 11562 at the start to 0 -20 after
> about 358 seconds.  Here's the output:
>
> ./cassandra-stress  -d 134.36.36.218
> Created keyspaces. Sleeping 1s for propagation.
> total,interval_op_rate,interval_key_rate,latency,95th,99th,elapsed_time
> 13629,1362,1362,15.3,117.6,531.1,10
> 37545,2391,2391,9.4,74.0,438.4,20
> 105410,6786,6786,3.3,38.0,216.4,30
> 209014,10360,10360,2.7,26.2,216.5,41
> 320024,11101,11101,2.5,14.5,216.5,51
> 430216,11019,11019,2.4,10.5,215.4,61
> 531905,10168,10168,2.4,8.3,177.1,72
> 619672,8776,8776,2.4,6.2,145.8,82
> 653977,3430,3430,2.4,5.9,145.4,92
> 682648,2867,2867,2.4,6.1,145.4,102
> 692771,1012,1012,2.4,6.1,145.4,113
> 712163,1939,1939,2.4,6.0,4461.7,123
> 723761,1159,1159,2.4,6.0,4461.7,133
> 731115,735,735,2.4,6.1,4461.7,143
> 737627,651,651,2.4,6.2,4461.7,153
> 743853,622,622,2.4,7.0,5056.1,164
> 747345,349,349,2.4,7.0,5056.1,174
> 755501,815,815,2.5,6.9,6351.7,184
> 758692,319,319,2.5,6.9,5056.1,195
> 763960,526,526,2.5,7.3,5292.6,205
> 767966,400,400,2.5,7.4,5292.6,215
> 769514,154,154,2.5,7.4,5292.6,225
> 773492,397,397,2.5,7.2,6435.7,236
> 775374,188,188,2.5,7.4,5292.6,246
> 776035,66,66,2.6,7.5,5347.1,256
> 777896,186,186,2.6,7.9,6407.3,266
> 778791,89,89,2.6,8.0,6438.9,276
> 779646,85,85,2.6,8.0,6523.2,287
> 780785,113,113,2.6,11.1,6523.2,297
> 781336,55,55,2.6,11.7,6523.2,307
> 781684,34,34,2.6,13.3,16734.0,317
> 781818,13,13,2.7,13.9,16764.2,328
> 781952,13,13,2.7,13.9,16900.1,338
> 782195,24,24,2.7,15.3,16900.1,348
> 782294,9,9,2.7,15.3,16900.1,358
> 782362,6,6,2.7,15.5,21487.3,368
> 782589,22,22,2.7,20.1,21487.3,379
> 782775,18,18,2.7,28.8,21487.3,389
> 783012,23,23,2.8,29.4,21487.3,399
> 783248,23,23,2.8,68.2,21487.3,409
> 783270,2,2,2.8,68.2,21487.3,419
> 783283,1,1,2.8,68.2,21487.3,430
> 783283,0,0,2.8,68.2,21487.3,440
> 783337,5,5,2.8,198.6,42477.2,450
> 783492,15,15,2.9,5057.6,52687.3,460
> 783581,8,8,2.9,5349.0,59306.9,471
> 783807,22,22,3.0,6429.1,59306.9,481
> 783816,0,0,3.0,6438.3,59306.9,491
> 783945,12,12,3.2,11566.9,59306.9,501
> 783962,1,1,3.2,11612.0,59306.9,512
> 783962,0,0,3.2,11612.0,59306.9,522
>
>
> I installed 1.2.6 for comparision and that gave  expected results:
>
> ./cassandra-stress  -d 134.36.36.218
> Unable to create stress keyspace: Keyspace names must be
> case-insensitively unique ("Keyspace1" conflicts with "Keyspace1")
> total,interval_op_rate,interval_key_rate,latency/95th/99th,elapsed_time
> 22158,2215,2215,0.8,8.9,549.0,10
> 64192,4203,4203,1.0,7.0,486.2,20
> 114236,5004,5004,1.3,6.5,411.9,30
> 178407,6417,6417,1.4,5.5,411.9,40
> 281714,10330,10330,2.2,5.1,409.6,51
> 371684,8997,8997,2.4,5.1,407.5,61
> 464401,9271,9271,2.5,5.0,236.7,72
> 562797,9839,9839,2.6,5.2,87.5,82
> 655755,9295,9295,2.6,5.2,87.5,92
> 751560,9580,9580,2.6,4.7,179.9,103
> 848022,9646,9646,2.6,4.5,826.0,113
> 914539,6651,6651,2.6,4.7,823.2,123
> 1000000,8546,8546,2.6,5.1,1048.5,133
>
> Any ideas whats causing the slow down ?
>
> Andy
>
>
> The University of Dundee is a registered Scottish Charity, No: SC015096
>



-- 
Atenciosamente,
Sávio S. Teles de Oliveira
voice: +55 62 9136 6996
http://br.linkedin.com/in/savioteles
Mestrando em Ciências da Computação - UFG
Arquiteto de Software
Laboratory for Ubiquitous and Pervasive Applications (LUPA) - UFG

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