[HDFS-7159] Use block storage policy to set lazy persist preference

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.6.0
• Component/s: namenode
• Hadoop Flags: Reviewed
• Assignee: Arpit Agarwal
• Reporter: Arpit Agarwal
• Created: 27/Sep/14 01:05
• Updated: 01/Dec/14 03:10
• Resolved: 30/Sep/14 05:40

Description

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.

Issue Links

• requires: HDFS-7153 Add storagePolicy to NN edit log during file creation