[HBASE-7007] [MTTR] Study assigns to see if we can make them faster still

• Type: Improvement
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 0.95.0
• Tags: 0.96notable
• Assignee: Unassigned
• Reporter: Michael Stack
• Created: 18/Oct/12 00:00
• Updated: 15/Oct/13 04:46
• Resolved: 09/Jan/13 16:45

Description

Looking at a cluster start, I saw that it took about 25 minutes to assign and open 17k regions. 8 minutes was bulk assigning via zk. 17 minutes was opening the regions. "HBASE-6640 [0.89-fb] Allow multiple regions to be opened simultaneously" in trunk would help but maybe we can do less work up in zk for instance; e.g. if 3.4.5, we can do bulk ops in zk (or make a bulk assign znode that has many regions instead of one)

Issue Links

• relates to: HBASE-6109 Improve RIT performances during assignment on large clusters