[HBASE-19187] Remove option to create on heap bucket cache

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.0.0-alpha-3
• Fix Version/s: 2.0.0-beta-1, 2.0.0
• Component/s: regionserver
• Hadoop Flags: Incompatible change, Reviewed

Release Note

Removing the on heap Bucket cache feature.
The config "hbase.bucketcache.ioengine" no longer support the 'heap' value.
Its supported values now are 'offheap', 'file:<path>', 'files:<path>' and 'mmap:<path>'

• Assignee: Anoop Sam John
• Reporter: Biju Nair
• Created: 06/Nov/17 12:23
• Updated: 29/Dec/20 06:18
• Resolved: 11/Nov/17 07:11

Description

Since we are moving read and write paths to use direct memory, option to configure on heap bucket cache is irrelevant. We should remove that option.

Issue Links

• is a parent of: HBASE-25450 The parameter "hbase.bucketcache.size" is misdescribed