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Posted to hdfs-issues@hadoop.apache.org by "Wei-Chiu Chuang (Jira)" <ji...@apache.org> on 2022/08/11 00:00:00 UTC

[jira] [Created] (HDFS-16727) Consider reading chunk files using MappedByteBuffer

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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