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From Usman Waheed <usm...@opera.com>
Subject Rebalancing Hadoop Cluster running 15.3
Date Thu, 25 Jun 2009 09:33:58 GMT
Hi,

One of our test clusters is running HADOOP 15.3 with replication level 
set to 2. The datanodes are not balanced at all.

Datanode_1: 52%
Datanode_2: 82%
Datanode_3: 30%

15.3 does not have the rebalancer capability, we are planning to upgrade 
but not for now.

If i take out Datanode_1 from the cluster (decommission for sometime) 
will HADOOP balance so that Datanode_2 and Datanode_3 will even out to 56%?
Then i can re-introduce Datanode_1 back into the cluster.

Comments/Suggestions please?

Thanks,
Usman

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