[HBASE-22387] Evaluate the get/scan performance after reading HFile block into offheap directly

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Assignee: Zheng Hu
• Reporter: Zheng Hu
• Created: 09/May/19 08:51
• Updated: 01/Jul/22 21:42
• Resolved: 17/Jun/19 03:35

Description

Now, all sub-tasks has been resolved now (except the HBASE-21946 because of the hadoop dependency problem), will provide some performance benckmarks to show the latency improvement.

Issue Links

• is related to: HBASE-22504 Optimize the MultiByteBuff#get(ByteBuffer, offset, len)
• is related to: HDFS-14535 The default 8KB buffer in requestFileDescriptors#BufferedOutputStream is causing lots of heap allocation in HBase when using short-circut read
• is related to: HDFS-14541 When evictableMmapped or evictable size is zero, do not throw NoSuchElementException
• is related to: HBASE-22425 Balance shell command broken in HBase-3.0.0
• relates to: HBASE-14532 [book] dfs.client.read.shortcircuit is referenced as hbase-site.xml config and not described in section 7