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From "Tsz Wo Nicholas Sze (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7618) Support read when a file is being encoded/decoded
Date Wed, 18 Mar 2015 03:06:38 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7618?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14366552#comment-14366552
] 

Tsz Wo Nicholas Sze commented on HDFS-7618:
-------------------------------------------

Yes, the EC storage policy was added by HDFS-7347.  A directory could be set to the EC storage
policy; see TestBlockInitialEncoding.testBlockInitialEncoding().

> ... Which situation is this jira targeted on, or both these two situation should be taken
care of? 

The latter, i.e. support read when a file is being converted.  HDFS-7661 is for supporting
read when a EC file is being written.  Do you also want to work on it?



> 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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