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From Jonathan Disher <jdis...@parad.net>
Subject Altering logical rack configuration
Date Sat, 05 Feb 2011 01:00:17 GMT
In my existing 48-node cluster, the engineer who originally designed it (no longer here) did
not specify logical racks in the HDFS configuration, instead leaving everything in "default-rack".
 Now I have 4 physical racks of machines, and I am becoming concerned about failure and near/far
replication issues.

Anyone have any ideas what will happen if I tell hadoop about the physical rack layout (i.e.
nuke default-rack, and create rack110, rack111, rack112, rack113, etc)?

-j
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