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https://issues.apache.org/jira/browse/HADOOP-12161?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14621412#comment-14621412
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Arpit Agarwal commented on HADOOP-12161:
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We can just return the policy id and leave the translation to the client. This
avoids a second RPC call for each file since the client can cache the policy
suite. We also don't need to throw for {{BLOCK_STORAGE_POLICY_ID_UNSPECIFIED}}.
> 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
>
>
> 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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