[jira] [Resolved] (HDFS-7159) Use block storage policy to set lazy persist preference

["Arpit Agarwal (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-7159?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Arpit Agarwal resolved HDFS-7159.
---------------------------------
       Resolution: Fixed
    Fix Version/s: HDFS-6581
     Hadoop Flags: Reviewed

Thanks a lot for reviewing the large patch, Jing and Nicholas!

Jing, I filed HDFS-7170 to address the policy suite instantiation in DFSOutputstream  that Jing raised.

HDFS-6919 will address the disable via configuration point Nicholas raised.

> Use block storage policy to set lazy persist preference
> -------------------------------------------------------
>
>                 Key: HDFS-7159
>                 URL: https://issues.apache.org/jira/browse/HDFS-7159
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: namenode
>            Reporter: Arpit Agarwal
>            Assignee: Arpit Agarwal
>             Fix For: HDFS-6581
>
>         Attachments: HDFS-7159.01.patch, HDFS-7159.02.patch, HDFS-7159.03.patch, HDFS-7159.04.patch
>
>
> Now that HDFS-6584 feature is ready and supports block storage policies on both files and directories, we can make use of Storage Policies to store the LAZY_PERSIST preference.
> This only affects how the preference is persisted in the FsImage/Edit logs. There is no change to the client API or to NN-DN interaction.
> An additional advantage is that can support setting the lazy persist preference on a directory and it will take effect for all new files.



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