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https://issues.apache.org/jira/browse/HDFS-10916?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Wang updated HDFS-10916:
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Release Note:
EC policy is now stored in the "system" extended attribute namespace rather
than "raw". This means the EC policy extended attribute is no longer directly
accessible by users or preserved across a distcp that preserves raw extended
attributes.
Users can instead use HdfsAdmin#setErasureCodingPolicy and
HdfsAdmin#getErasureCodingPolicy to set and get the EC policy for a path.
> Switch from "raw" to "system" namespace for erasure coding policy
> -----------------------------------------------------------------
>
> Key: HDFS-10916
> URL: https://issues.apache.org/jira/browse/HDFS-10916
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: erasure-coding
> Affects Versions: 3.0.0-alpha1
> Reporter: Andrew Wang
> Assignee: Andrew Wang
> Attachments: HDFS-10916.001.patch
>
>
> Currently EC policy is stored as in the raw xattr namespace. It would be
> better to store this in "system" like storage policy.
> Raw is meant for attributes which need to be preserved across a distcp, like
> encryption info. EC policy is more similar to replication factor or storage
> policy, which can differ between the src and target of a distcp.
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