[HBASE-10280] Make inMemoryForceMode of LruBlockCache configurable per column-family

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Incomplete
• Component/s: io, regionserver
• Assignee: Unassigned
• Reporter: Honghua Feng
• Created: 04/Jan/14 02:33
• Updated: 17/Jun/22 15:36
• Resolved: 17/Jun/22 15:36

Description

An extension of HBASE-10263 per [e-mail]'s suggestion.

brief description of this extension is as below:
1. if the global inMemoryForceMode is on, all in-memory blocks are preemptive no matter what their per-column-family inMemoryForceMode are;
2. if the global inMemoryForceMode is off, only in-memory blocks of column-family with inMemoryForceMode on are preemptive; non-preemptive inMemory blocks respect the single/multi/memory ratio;

In short, global flag dominates, and per-column-family flag can only control its own blocks.