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