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From "Rakesh R (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-9261) Erasure Coding: Skip encoding the data cells if all the parity data streamers are failed for the current block group
Date Fri, 16 Oct 2015 18:18:05 GMT
Rakesh R created HDFS-9261:
------------------------------

             Summary: Erasure Coding: Skip encoding the data cells if all the parity data
streamers are failed for the current block group
                 Key: HDFS-9261
                 URL: https://issues.apache.org/jira/browse/HDFS-9261
             Project: Hadoop HDFS
          Issue Type: Sub-task
            Reporter: Rakesh R
            Assignee: Rakesh R
            Priority: Minor


{{DFSStripedOutputStream}} will continue writing with minimum number (dataBlockNum) of live
datanodes. It won't replace the failed datanodes immediately for the current block group.
Consider a case where all the parity data streamers are failed, now it is unnecessary to encode
the data block cells and generate the parity data. This is a corner case where it can skip
{{writeParityCells()}} step.



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