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https://issues.apache.org/jira/browse/HDFS-7618?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14366482#comment-14366482
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GAO Rui commented on HDFS-7618:
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[~szetszwo]
Is the related code of storage policy changing already been done?
Title of this jira {{Support read when a file is being encoded/decoded}} seems
to mean that support read while a file is right under the process of
encoding/decoding. While the description {{When the storage policy of a file
is changed from replication to EC or vice versa, users should still be able to
read the file.}} seems to mean that support read after the storage policy had
already been changed. Which situation is this jira targeted on, or both these
two situation should be taken care of?
> Support read when a file is being encoded/decoded
> -------------------------------------------------
>
> Key: HDFS-7618
> URL: https://issues.apache.org/jira/browse/HDFS-7618
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: hdfs-client, namenode
> Reporter: Tsz Wo Nicholas Sze
> Assignee: GAO Rui
>
> When the storage policy of a file is changed from replication to EC or vice
> versa, users should still be able to read the file.
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