[HBASE-18533] Expose BucketCache values to be configured

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.4.0, 2.0.0-alpha-2, 2.0.0
• Component/s: BucketCache
• Hadoop Flags: Reviewed

Release Note

This patch exposes configuration for Bucketcache. These configs are very similar to those for the LRU cache, but are described below:

"hbase.bucketcache.single.factor"; /** Single access bucket size */
"hbase.bucketcache.multi.factor"; /** Multiple access bucket size */
"hbase.bucketcache.memory.factor"; /** In-memory bucket size */
"hbase.bucketcache.extrafreefactor"; /** Free this floating point factor of extra blocks when evicting. For example free the number of blocks requested * (1 + extraFreeFactor) */
"hbase.bucketcache.acceptfactor"; /** Acceptable size of cache (no evictions if size < acceptable) */
"hbase.bucketcache.minfactor"; /** Minimum threshold of cache (when evicting, evict until size < min) */

• Assignee: Zach York
• Reporter: Zach York
• Created: 08/Aug/17 00:04
• Updated: 21/Mar/18 22:08
• Resolved: 14/Aug/17 20:30

Description

BucketCache always uses the default values for all cache configuration. However, this doesn't work for all use cases. In particular, users want to be able to configure the percentage of the cache that is single access, multi access, and in-memory access.

Issue Links

• links to: Review Board (branch-1)
• links to: Review Board (master)