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From "Zhe Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-7369) Erasure coding: distribute block recovery work to DataNode
Date Thu, 12 Feb 2015 18:58:13 GMT

     [ https://issues.apache.org/jira/browse/HDFS-7369?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Zhe Zhang updated HDFS-7369:
----------------------------
    Description: 
This JIRA updates NameNode to handle background / offline recovery of erasure coded blocks.
It includes 2 parts:
# Extend {{UnderReplicatedBlocks}} to recognize EC blocks and insert them to appropriate priority
levels. 
# Update {{ReplicationMonitor}} to distinguish block codec tasks and send a new DataNode command.

  was:{{ErasureCodingBlocks}} on NameNode should insert parity blocks into {{UnderReplicatedBlocks}}.
Then {{ReplicationMonitor}} should be extended to distinguish block encoding tasks and send
a new DataNode command.


> Erasure coding: distribute block recovery work to DataNode
> ----------------------------------------------------------
>
>                 Key: HDFS-7369
>                 URL: https://issues.apache.org/jira/browse/HDFS-7369
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Zhe Zhang
>            Assignee: Zhe Zhang
>
> This JIRA updates NameNode to handle background / offline recovery of erasure coded blocks.
It includes 2 parts:
> # Extend {{UnderReplicatedBlocks}} to recognize EC blocks and insert them to appropriate
priority levels. 
> # Update {{ReplicationMonitor}} to distinguish block codec tasks and send a new DataNode
command.



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