[HBASE-14984] Allow memcached block cache to set optimze to false

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.2.0, 1.3.0, 2.0.0
• Fix Version/s: 1.2.0, 1.3.0, 2.0.0
• Component/s: BlockCache
• Hadoop Flags: Reviewed

Release Note

Setting hbase.cache.memcached.spy.optimze to true will allow the spy memcached client to try and optimize for the number of requests outstanding. This can increase throughput but can also increase variance for request times.

Setting it to true will help when round trip times are longer.
Setting it to false ( the default ) will help ensure a more even distribution of response times.

• Assignee: Elliott Neil Clark
• Reporter: Elliott Neil Clark
• Created: 15/Dec/15 21:04
• Updated: 17/Dec/15 23:59
• Resolved: 16/Dec/15 18:59

Description

In order to keep latency consistent it might not be good to allow the spy memcached client to optimize.