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https://issues.apache.org/jira/browse/HDFS-9603?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15145556#comment-15145556
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Kai Sasaki commented on HDFS-9603:
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[~zhz] Thanks for clarifying! I'm not familiar with HH deeply, but HH seems
require multiple stripes to reconstruct a stripe. So I think HH does not fit to
current {{ECBlockGroup}} interface. Even if using {{ECBlockGroup}}, we will
need to change it when adapting HH algorithm. It is reasonable to keep using
raw coders for now because hflush/hsync is important to reliable operation to
HDFS.
{quote}
1. Supporting multiple EC policies
{quote}
Does it mean we will support other coding algorithm such as HH or other stripe
configuration such as RS-10-4, RS-3-2?
> Erasure Coding: Use ErasureCoder to encode/decode a block group
> ---------------------------------------------------------------
>
> Key: HDFS-9603
> URL: https://issues.apache.org/jira/browse/HDFS-9603
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Rui Li
> Assignee: Rui Li
> Attachments: HDFS-9603.1.patch, HDFS-9603.2.patch, HDFS-9603.3.patch
>
>
> According to design, {{ErasureCoder}} is responsible to encode/decode a block
> group. Currently however, we directly use {{RawErasureCoder}} to do the work,
> e.g. in {{DFSStripedOutputStream}}. This task attempts to encapsulate
> {{RawErasureCoder}} to comply with the design.
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