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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-1505) hfile should change how it reads from hdfs -- pread/seek+read -- dependent on recent history
Date Tue, 09 Jun 2009 05:20:07 GMT
hfile should change how it reads from hdfs -- pread/seek+read -- dependent on recent history
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                 Key: HBASE-1505
                 URL: https://issues.apache.org/jira/browse/HBASE-1505
             Project: Hadoop HBase
          Issue Type: Improvement
            Reporter: stack


hfile preads all the time at moment.  its good we do this when we want to up our random reads.
 but apparently pread involves open socket, seek, read, close socket whereas seek+read could
leave us aligned at next block to read and make for some savings.  hfile could have a short
memory and change how it pulls from hdfs dependent on recent history.

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