[HDFS-544] Add a "rbw" sub directory to DataNode data directory

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Append Branch
• Fix Version/s: Append Branch
• Component/s: datanode
• Hadoop Flags: Incompatible change, Reviewed

Release Note

This issue changes the DataNode data directory layout to be
current
   finalized // store finalized replicas
   rbw // store RBW replicas
tmp // store Temporary replicas
HDFS layout version is changed to be -20.

• Assignee: Hairong Kuang
• Reporter: Hairong Kuang
• Created: 12/Aug/09 18:36
• Updated: 24/Aug/09 23:53
• Resolved: 24/Aug/09 23:19

Description

Add a "rbw" sub directory to DataNode to persist RBW, RWR, and RUR replicas.