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From Andrew Cobley <a.e.cob...@dundee.ac.uk>
Subject Re: Strange cassandra-stress results with 2.0.0 beta1
Date Thu, 25 Jul 2013 15:11:58 GMT
I'm getting something similar for beta 2, you can see here it's dropping from 12000 to 400
quite quickly.   The output from cassandra is available n dropbox here:

https://dl.dropboxusercontent.com/u/1638201/output.txt (184kBytes)

I'm wondering if it's a GC issue ?

 ./cassandra-stress -d 134.36.36.218 -n 30000000
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
73761,7376,7376,2.1,7.6,181.0,10
199159,12539,12539,2.4,7.5,102.4,20
316978,11781,11781,2.4,7.8,172.7,30
434060,11708,11708,2.4,8.1,170.6,40
552650,11859,11859,2.5,7.3,170.8,50
602432,4978,4978,2.5,7.3,170.8,60
614364,1193,1193,2.5,7.5,5490.4,71
634199,1983,1983,2.5,8.1,5490.4,81
653293,1909,1909,2.5,8.9,5490.4,91
658398,510,510,2.5,8.7,5490.4,101
671805,1340,1340,2.6,8.7,5490.4,111
678677,687,687,2.6,9.1,5490.4,121
685247,657,657,2.6,10.2,5626.8,131
691519,627,627,2.6,10.7,5626.8,141
693682,216,216,2.6,10.7,5626.8,151
700082,640,640,2.7,11.9,6460.1,161
703952,387,387,2.7,12.5,6460.1,172
706007,205,205,2.7,12.5,6460.1,182
709988,398,398,2.7,12.7,6647.0,192
^Cmacaroon:bin administrator$

Andy C

On 25 Jul 2013, at 15:28, Sávio Teles <savio.teles@lupa.inf.ufg.br<mailto:savio.teles@lupa.inf.ufg.br>>
wrote:

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<mailto: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:




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