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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Created: (HDFS-1034) Enhance datanode to read data and checksum file in parallel
Date Thu, 11 Mar 2010 18:34:27 GMT
Enhance datanode to read data and checksum file in parallel
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                 Key: HDFS-1034
                 URL: https://issues.apache.org/jira/browse/HDFS-1034
             Project: Hadoop HDFS
          Issue Type: Improvement
            Reporter: dhruba borthakur
            Assignee: dhruba borthakur


In the current HDFS implementation, a read of a block issued to the datanode results in a
disk access to the checksum file followed by a disk access to the checksum file. It would
be nice to be able to do these two IOs in parallel to reduce read latency.

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