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From "Li Bo (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-7653) Block Readers and Writers used in both client side and datanode side
Date Thu, 22 Jan 2015 02:31:34 GMT
Li Bo created HDFS-7653:
---------------------------

             Summary: Block Readers and Writers used in both client side and datanode side
                 Key: HDFS-7653
                 URL: https://issues.apache.org/jira/browse/HDFS-7653
             Project: Hadoop HDFS
          Issue Type: Sub-task
            Reporter: Li Bo
            Assignee: Li Bo


There're a lot of block read/write operations in HDFS-EC, for example, when client writes
a file in striping layout, client has to write several blocks to several different datanodes;
if a datanode wants to do an encoding/decoding task, it has to read several blocks from itself
and other datanodes, and writes one or more blocks to itself or other datanodes.  



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