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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-2247) [performance] Small scans should run like a random-read
Date Mon, 22 Feb 2010 23:02:27 GMT
[performance] Small scans should run like a random-read

                 Key: HBASE-2247
                 URL: https://issues.apache.org/jira/browse/HBASE-2247
             Project: Hadoop HBase
          Issue Type: Improvement
            Reporter: stack

hbase-2180 added pread whenever we do a get -- random-read -- and kept the old sync+position+read
for when scanning.   In between is the case of small scans.  Small scans of 0-100 or so rows
where the cells are small will likely fit a single hfile blocksize, especially if its the
default 64k.  We should recognize small scans and flip to random-read to satisfy (somehow).
 It'll up the performance a bit.

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