[HDFS-8584] Support using ramfs partitions on Linux

• Type: Sub-task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.7.0
• Component/s: datanode
• Assignee: Arpit Agarwal
• Reporter: Arpit Agarwal
• Created: 12/Jun/15 01:56
• Updated: 06/Jan/17 22:05

Description

Now that the bulk of work for HDFS-6919 is complete the memory limit enforcement uses the dfs.datanode.max.locked.memory setting and not the RAM disk free space availability.

We can now use ramfs partitions. This will require fixing the free space computation and reservation logic for transient volumes.