[jira] [Updated] (HDFS-7866) Erasure coding: NameNode manages multiple erasure coding policies

["Rui Li (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-7866?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rui Li updated HDFS-7866:
-------------------------
    Attachment: HDFS-7866.8.patch

Update the patch as all the changes to tests are committed.
The v8 patch uses hard coded policy IDs and combines IS_STRIPED and REPLICATION as Zhe suggested.
{{TestStripedBlockUtil}}, {{TestStripedINodeFile}} and {{TestBlockRecovery}} use hard coded policy (RS-6-3) to work with hard coded test suite. Other tests still use the default system policy which is set to RS-3-2 in the patch. Again this is only temporary to test if multiple policy really works.

> Erasure coding: NameNode manages multiple erasure coding policies
> -----------------------------------------------------------------
>
>                 Key: HDFS-7866
>                 URL: https://issues.apache.org/jira/browse/HDFS-7866
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Kai Zheng
>            Assignee: Rui Li
>         Attachments: HDFS-7866-v1.patch, HDFS-7866-v2.patch, HDFS-7866-v3.patch, HDFS-7866.4.patch, HDFS-7866.5.patch, HDFS-7866.6.patch, HDFS-7866.7.patch, HDFS-7866.8.patch
>
>
> This is to extend NameNode to load, list and sync predefine EC schemas in authorized and controlled approach. The provided facilities will be used to implement DFSAdmin commands so admin can list available EC schemas, then could choose some of them for target EC zones.



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