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From Ravikumar Govindarajan <ravikumar.govindara...@gmail.com>
Subject 0.8.1 Vs 1.0.7
Date Thu, 15 Mar 2012 09:41:05 GMT
Hi,

I ran some data import tests for cassandra 0.8.1 and 1.0.7. The results
were a little bit surprising

0.8.1, SimpleStrategy, Rep_Factor=3,QUORUM Writes, RP, SimpleSnitch

XXX.XXX.XXX.A  datacenter1 rack1       Up     Normal  140.61 GB       12.50%
XXX.XXX.XXX.B  datacenter1 rack1       Up     Normal  139.92 GB
12.50%
XXX.XXX.XXX.C  datacenter1 rack1       Up     Normal  138.81 GB
12.50%
XXX.XXX.XXX.D  datacenter1 rack1       Up     Normal  139.78 GB
12.50%
XXX.XXX.XXX.E  datacenter1 rack1       Up     Normal  137.44 GB
12.50%
XXX.XXX.XXX.F  datacenter1 rack1       Up     Normal  138.48 GB
12.50%
XXX.XXX.XXX.G  datacenter1 rack1       Up     Normal  140.52 GB
12.50%
XXX.XXX.XXX.H  datacenter1 rack1       Up     Normal  145.24 GB       12.50%

1.0.7, NTS, Rep_Factor{DC1:3, DC2:2}, LOCAL_QUORUM writes, RP [DC2 m/c yet
to join ring],
PropertyFileSnitch

XXX.XXX.XXX.A  DC1 RAC1       Up     Normal   48.72  GB       12.50%
XXX.XXX.XXX.B  DC1 RAC1       Up     Normal   51.23  GB       12.50%
XXX.XXX.XXX.C  DC1 RAC1       Up     Normal   52.4    GB       12.50%
XXX.XXX.XXX.D  DC1 RAC1       Up     Normal   49.64  GB       12.50%
XXX.XXX.XXX.E  DC1 RAC1       Up     Normal   48.5    GB       12.50%
XXX.XXX.XXX.F  DC1 RAC1       Up     Normal    53.38  GB       12.50%
XXX.XXX.XXX.G  DC1 RAC1       Up     Normal   51.11  GB       12.50%
XXX.XXX.XXX.H  DC1 RAC1       Up     Normal   53.36  GB       12.50%

There seems to be 3X savings in size for the same dataset running 1.0.7. I
have not enabled compression for any of the CFs. Will it be enabled by
default when creating a new CF in 1.0.7? cassandra.yaml is also mostly
identical.

Thanks and Regards,
Ravi

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