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From Tim Robertson <timrobertson...@gmail.com>
Subject PerformanceEvaluation results
Date Wed, 01 Feb 2012 12:51:39 GMT
Hi all,

We have a 3 node cluster (CD3u2) with the following hardware:

RegionServers (+DN + TT)
  CPU: 2x Intel(R) Xeon(R) CPU E5630 @ 2.53GHz (quad)
  Disks: 6x250G SATA 5.4K
  Memory: 24GB

Master (+ZK, JT, NN)
  CPU: Intel(R) Xeon(R) CPU X3363 @ 2.83GHz, 2x6MB (quad)
  Disks: 2x500G SATA 7.2K
  Memory: 8GB

Memory wise, we have:
  NN: 1GB
  JT: 1GB
  HBase master: 6GB
  ZK: 1GB
  RegionServer: 6GB
  TaskTracker: 1GB
  11 Mappers @ 1GB each
  7 Reducers @ 1GB each

HDFS was empty, and I ran randomWrite and scan both with number
clients of 50 (seemed to spawn 500 Mappers though...)

12/02/01 13:27:47 INFO mapred.JobClient:     ROWS=52428500
12/02/01 13:27:47 INFO mapred.JobClient:     ELAPSED_TIME=84504886

12/02/01 13:42:52 INFO mapred.JobClient:     ROWS=52428500
12/02/01 13:42:52 INFO mapred.JobClient:     ELAPSED_TIME=8158664

Would I be correct in thinking that this is way below what is to be
expected of this hardware?
We're setting up ganglia now to start debugging, but any suggestions
on how to diagnose this would be greatly appreciated.


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