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From Philippe <>
Subject Network traffic patterns
Date Tue, 15 Nov 2011 21:16:00 GMT
I'm trying to understand the network usage I am seeing in my cluster, can
anyone shed some light?
It's an RF=3, 12-node, cassandra 0.8.6 cluster. The nodes are
p13,p14,p15...p24 and are consecutive in that order on the ring.
Each node is only a cassandra database. I am hitting the cluster from
another server (p4).

The pattern on p4 is the pattern is to

   1. read a lot of data (some columns for hundreds to tens of thousands of
   keys, split into 512-key multigets)
   2. process the data
   3. write back a byte array to cassandra (average size is 400 bytes)

p4 reads as

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