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https://issues.apache.org/jira/browse/HDFS-13209?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16391040#comment-16391040
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Jean-Marc Spaggiari commented on HDFS-13209:
--------------------------------------------

Hi [~rakeshr] thanks a lot for your feedback. I guess this will totally work 
for me. Like you said, this small add to the API will be nice, but maybe not 
100% required. I will try with what you proposed here. 

Thanks.

> DistributedFileSystem.create should allow an option to provide StoragePolicy
> ----------------------------------------------------------------------------
>
>                 Key: HDFS-13209
>                 URL: https://issues.apache.org/jira/browse/HDFS-13209
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: hdfs
>    Affects Versions: 3.0.0
>            Reporter: Jean-Marc Spaggiari
>            Priority: Major
>
> DistributedFileSystem.create allows to get a FSDataOutputStream. The stored 
> file and related blocks will used the directory based StoragePolicy.
>  
> However, sometime, we might need to keep all files in the same directory 
> (consistency constraint) but might want some of them on SSD (small, in my 
> case) until they are processed and merger/removed. Then they will go on the 
> default policy.
>  
> When creating a file, it will be useful to have an option to specify a 
> different StoragePolicy...



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