LiXin Ge created HDFS-11765:
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Summary: Fix:Performance regression due to incorrect use of
DataChecksum
Key: HDFS-11765
URL: https://issues.apache.org/jira/browse/HDFS-11765
Project: Hadoop HDFS
Issue Type: Bug
Components: native, performance
Affects Versions: 3.0.0-alpha1, 2.8.0
Reporter: LiXin Ge
Fix For: 3.0.0-alpha2
Recently I have upgraded my Hadoop version from 2.6 to 3.0, and I find that the
write performance decreased by 13%. After some days comparative analysis, It's
seems introduced by HADOOP-10865.
Since James Thomas have done the work that native checksum can run against
byte[] arrays instead of just against byte buffers, we may use native method
preferential because it runs faster than others.[~szetszwo]] and [~iwasakims]
could you take a look at this to see if it make bad effect on your benchmark
test? [~tlipcon] could you help to see if I have make mistakes in this patch?
thanks!
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