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From Aaron McCurry <>
Subject Ideal configuration for given hardware
Date Sun, 23 May 2010 20:30:18 GMT
I am planning on setting up a Cassandra cluster on a small 16 node cluster
(possibly 32 way).  Each machine has 8 cores 32 Gig of ram and 8 hds.  My
first thought is to setup one of those hds for the commit log, 6 for data
and leave one for the OS.  However I do have a concern about best utilizing
my memory, should I run a larger heap?  Should I run several cassandra
processes on the same box?

My concern about the larger heap is because GC's typically get slower.  And
if I run several procs, does cassandra realize that it's the same box for
replication purposes?

I do have other hd conf options, hardware RAID 0,1,or 5.

Just looking for some general configuration options as well as some real
world successes with similarly sized hardware.  Thanks!


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