Wei-Chiu Chuang created HDFS-16727:
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Summary: Consider reading chunk files using MappedByteBuffer
Key: HDFS-16727
URL: https://issues.apache.org/jira/browse/HDFS-16727
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: Wei-Chiu Chuang
Attachments: Screen Shot 2022-08-04 at 7.12.55 AM.png,
ozone_dn-rhel03.ozone.cisco.local.html
Running Impala TPC-DS which stresses Ozone DN read path.
BufferUtils#assignByteBuffers stands out as one of the offender.
We can experiment with MappedByteBuffer and see if it makes performance better.
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