[HBASE-18485] Performance issue: ClientAsyncPrefetchScanner is slower than ClientSimpleScanner

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha-1, 2.0.0-alpha-2
• Fix Version/s: 2.0.0-alpha-2, 2.0.0
• Hadoop Flags: Reviewed
• Assignee: Guanghao Zhang
• Reporter: Guanghao Zhang
• Created: 31/Jul/17 13:34
• Updated: 21/Mar/18 22:08
• Resolved: 07/Aug/17 02:45

Description

Copied the test result from HBASE-17994.

./bin/hbase org.apache.hadoop.hbase.PerformanceEvaluation --rows=100000 --nomapred scan 1
./bin/hbase org.apache.hadoop.hbase.PerformanceEvaluation --rows=100000 --nomapred --asyncPrefetch=True scan 1

Mean latency.

	Test1	Test2	Test3	Test4	Test5
scan	12.21	14.32	13.25	13.07	11.83
scan with prefetch=True	37.36	37.88	37.56	37.66	38.28