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HBase, mail # user - Excessive .META scans

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Excessive .META scans
Varun Sharma 2013-07-29, 17:32
Hi folks,

We are seeing an issue with hbase 0.94.3 on CDH 4.2.0 with excessive .META.

In the steady state where there are no client crashes and there are no
region server crashes/region movement, the server holding .META. is serving
an incredibly large # of read requests on the .META. table.

>From my understanding, in the steady state, region locations should be
indefinitely cached in the client. The client is running a work load of
multiput(s), puts, gets and coprocessor calls.