[HBASE-12957] region_mover#isSuccessfulScan may be extremely slow on region with lots of expired data

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.1.0, 0.98.11, 1.0.2, 2.0.0
• Component/s: scripts
• Hadoop Flags: Reviewed
• Assignee: hongyu bi
• Reporter: hongyu bi
• Created: 03/Feb/15 06:37
• Updated: 03/Jun/15 15:29
• Resolved: 04/Feb/15 04:07

Description

region_mover will call isSuccessfulScan when region has moved to make sure it's healthy, however , if the moved region has lots of expired data region_mover#isSuccessfulScan will take a long time to finish ,that may even exceed "lease timeout".So I made isSuccessfulScan a get-like scan to achieve faster response in that case.

workaround:before graceful_stop/rolling_restart ，call major_compact on the table with small TTL