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

     [ https://issues.apache.org/jira/browse/HDFS-16727?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wei-Chiu Chuang updated HDFS-16727:
-----------------------------------
    Attachment: ozone_dn-rhel03.ozone.cisco.local.html

> 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
>            Priority: Major
>         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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