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From David Koch <ogd...@googlemail.com>
Subject HBase M/R with M/R and HBase not on same cluster
Date Mon, 18 Mar 2013 22:09:38 GMT

Is it possible to run a M/R on cluster A over a table that resides on
cluster B with output to a table on cluster A? If so, how?

I am interested in doing this for the purpose of copying part of a table
from B to A. Cluster B is a production environment, cluster A is a slow
test platform. I do not want the M/R to run on B since it would block
precious slots on this cluster. Otherwise I could just run CopyTable on
cluster B and specify cluster A as output quorum.

Could this work by pointing the client configuration at the mapred-site.xml
of cluster A and the hdfs-site.xml and hbase-site.xml of cluster B? In this
scenario - in order to output to cluster A I guess I'd have to set
TableOutputFormat.QUORUM_ADDRESS to cluster A.

I use a client configuration generated by CDH4 and there are some other
files floating around - such as core-site.xml, not sure what to do with

Thank you,


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