[HBASE-24742] Improve performance of SKIP vs SEEK logic

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha-1, 1.7.0, 2.4.0
• Fix Version/s: 3.0.0-alpha-1, 2.3.1, 1.7.0, 2.4.0, 2.1.10, 2.2.6
• Component/s: Performance, regionserver
• Assignee: Lars Hofhansl
• Reporter: Lars Hofhansl
• Created: 15/Jul/20 00:27
• Updated: 02/Aug/20 20:10
• Resolved: 21/Jul/20 22:51

Description

In our testing of HBase 1.3 against the current tip of branch-1 we saw a 30% slowdown in scanning scenarios.

We tracked it back to HBASE-17958 and HBASE-19863.
Both add comparisons to one of the tightest HBase has.

Bharath Vissapragada

Issue Links

• is related to: HBASE-17958 Avoid passing unexpected cell to ScanQueryMatcher when optimize SEEK to SKIP
• is related to: HBASE-19863 java.lang.IllegalStateException: isDelete failed when SingleColumnValueFilter is used
• relates to: HBASE-24637 Reseek regression related to filter SKIP hinting
• links to: GitHub Pull Request #2075
• links to: GitHub Pull Request #2081