[
https://issues.apache.org/jira/browse/HDFS-8136?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14504624#comment-14504624
]
Li Bo commented on HDFS-8136:
-----------------------------
The patch also looks good to me. When I apply the patch to branch 7285, it
shows {{Reversed (or previously applied) patch detected}}. Your changes to
{{TestDFSStripedOutputStream}} seems has been committed to branch by other
patch. Could you update your patch according to current branch code?
> Client gets and uses EC schema when reads and writes a stripping file
> ---------------------------------------------------------------------
>
> Key: HDFS-8136
> URL: https://issues.apache.org/jira/browse/HDFS-8136
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Affects Versions: HDFS-7285
> Reporter: Kai Zheng
> Assignee: Kai Sasaki
> Attachments: HDFS-8136.1.patch, HDFS-8136.2.patch, HDFS-8136.3.patch
>
>
> Discussed with [~umamaheswararao] and [~vinayrpet], in client when reading
> and writing a stripping file, it can invoke a separate call to NameNode to
> request the EC schema associated with the EC zone where the file is in. Then
> the schema can be used to guide the reading and writing. Currently it uses
> hard-coded values.
> Optionally, as an optimization consideration, client may cache schema info
> per file or per zone or per schema name. We could add schema name in
> {{HdfsFileStatus}} for that.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
