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From "dragon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-10023) CLONE - Send the EC schema to DataNode via EC encoding/recovering command
Date Tue, 15 Mar 2016 08:15:36 GMT
dragon created HDFS-10023:
-----------------------------

             Summary: CLONE - Send the EC schema to DataNode via EC encoding/recovering command
                 Key: HDFS-10023
                 URL: https://issues.apache.org/jira/browse/HDFS-10023
             Project: Hadoop HDFS
          Issue Type: Sub-task
            Reporter: dragon
            Assignee: Uma Maheswara Rao G
             Fix For: HDFS-7285


Discussed with [~umamaheswararao] and [~vinayrpet], we should also send the EC schema to DataNode
as well contained in the EC encoding/recovering command. The target DataNode will use it to
guide the executing of the task. 

Another way would be, DataNode would just request schema actively thru a separate RPC call,
and as an optimization consideration, DataNode may cache schemas to avoid repeatedly asking
for the same schema twice.



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