[HBASE-4528] The put operation can release the rowlock before sync-ing the Hlog

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.94.0
• Component/s: regionserver
• Hadoop Flags: Reviewed
• Release Note: Adds early-lock-release ability so we can do the WAL sync outside of the row lock. Extends MemStore/RWCC to support rollback.
• Assignee: Dhruba Borthakur
• Reporter: Dhruba Borthakur
• Created: 02/Oct/11 03:03
• Updated: 12/Oct/12 05:34
• Resolved: 28/Oct/11 21:50

Description

This allows for better throughput when there are hot rows. A single row update improves from 100 puts/sec/server to 5000 puts/sec/server.