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From "Erik Holstad (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-1307) Threading writes and reads into HBase.
Date Fri, 03 Apr 2009 17:28:12 GMT
Threading writes and reads into HBase.

                 Key: HBASE-1307
                 URL: https://issues.apache.org/jira/browse/HBASE-1307
             Project: Hadoop HBase
          Issue Type: Improvement
          Components: regionserver
    Affects Versions: 0.21.0
            Reporter: Erik Holstad

I created this issue to be the overall issue for threading to increase read and write performance
in HBase and to keep it as a discussion place about threading of these elements in general.
Today we are doing batching of  writes and from 0.20 you will be able to do that for reads
too. The thing is that the batching procedure doesn't use the ability to run these different
queries at the same time, but more like a series of queries. I think that after getting a
good stable 0.20 system down we should try to add threading to increase throughput for both
reading and writing. At the top level of these calls I don't think that is is goin gto be
to hard to do this in parallel, where it gets a little bit more complicated is when you get
down to running a get query on memcache and all the storefiles at the same time, but above
that I don't see it being to hard. I do think that this should not be a part of 0.20 but rather
an optimization in 0.21 or so.

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