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https://issues.apache.org/jira/browse/HDFS-7859?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14495493#comment-14495493
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Kai Zheng commented on HDFS-7859:
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Hi [~zhz],
Thanks for taking care of this and your good suggestion. It looks reasonable to
me. This will sound like a more solid base for the merge.
To summarize further:
1. This issue HDFS-7859 would provide two system defined schemas in Java codes:
one is the system default schema (rs-6-3), already there; a new one, suggesting
rs-10-4; It also ensure the two schemas will be persisted in the image/editlog
for later querying.
2. The left gaps will be processed as follow-on to be done in HDFS-7866, mainly
about how to customize site specific schemas thru a XML file. The design will
also be updated.
> Erasure Coding: Persist EC schemas in NameNode
> ----------------------------------------------
>
> Key: HDFS-7859
> URL: https://issues.apache.org/jira/browse/HDFS-7859
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Kai Zheng
> Assignee: Xinwei Qin
> Attachments: HDFS-7859.001.patch
>
>
> In meetup discussion with [~zhz] and [~jingzhao], it's suggested that we
> persist EC schemas in NameNode centrally and reliably, so that EC zones can
> reference them by name efficiently.
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