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From "Jing Zhao (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-12161) Add getStoragePolicy API to the FileSystem interface
Date Mon, 13 Jul 2015 21:13:04 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-12161?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14625353#comment-14625353
] 

Jing Zhao commented on HADOOP-12161:
------------------------------------

Thanks for working on this, [~brahmareddy]. And thanks for the review, Arpit! So one question
here is that the storage policy byte may be more like an internal implementation inside of
HDFS. For other FileSystems, it is possible that they can use other types to indicate the
policy or the id of the policy. So I think here maybe it's better to use {{BlockStoragePolicySpi}}
as the return type.

> Add getStoragePolicy API to the FileSystem interface
> ----------------------------------------------------
>
>                 Key: HADOOP-12161
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12161
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Arpit Agarwal
>            Assignee: Brahma Reddy Battula
>         Attachments: HADOOP-12161-001.patch, HADOOP-12161-002.patch
>
>
> HDFS-8345 added {{FileSystem#getAllStoragePolicies}} and {{FileSystem#setStoragePolicy}}.
Jira to
> # Add a corresponding {{FileSystem#getStoragePolicy}} to query the storage policy for
a given file/directory.
> # Add corresponding implementation for HDFS i.e. {{DistributedFileSystem#getStoragePolicy}}.
> # Update the [FileSystem specification|https://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/filesystem/filesystem.html].
This will require editing _hadoop-common-project/hadoop-common/src/site/markdown/filesystem/filesystem.md_.



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