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From "Jonathan Gray (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-1141) Fetching large numbers of columns is slow outside of HDFS
Date Tue, 20 Jan 2009 00:12:59 GMT
Fetching large numbers of columns is slow outside of HDFS
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                 Key: HBASE-1141
                 URL: https://issues.apache.org/jira/browse/HBASE-1141
             Project: Hadoop HBase
          Issue Type: Bug
    Affects Versions: 0.20.0
            Reporter: Jonathan Gray
             Fix For: 0.20.0


While working on a Cell cache, we have found during random-read tests that the number of columns
has an enormous impact on performance.  Accounting for increased HDFS access time, there is
still a great deal of time being spent coming out of the Region and then across the wire to
HTable.

Erik Holstad has done this testing and will post some of his results here when completed.

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