[HBASE-28055] Performance improvement for scan over several stores.

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha-4, 2.5.5
• Fix Version/s: 2.6.0, 2.4.18, 2.5.6, 3.0.0-beta-1
• Assignee: Sergey Soldatov
• Reporter: Sergey Soldatov
• Created: 31/Aug/23 05:06
• Updated: 26/Dec/23 10:02
• Resolved: 07/Sep/23 02:19

Description

During the fix of HBASE-19863, an additional check for fake cells that trigger reseek was added.  It comes that this check produces unnecessary reseeks because
matcher.compareKeyForNextColumn should be used only with indexed keys. Later  larsh suggested doing a simple check for OLD_TIMESTAMP and it looks like a better solution.

Issue Links

• is caused by: HBASE-19863 java.lang.IllegalStateException: isDelete failed when SingleColumnValueFilter is used
• links to: GitHub Pull Request #5379
• links to: GitHub Pull Request #5392
• links to: GitHub Pull Request #5393
• links to: GitHub Pull Request #5394