[jira] [Updated] (HDDS-4094) Support byte-leve write in Freon HadoopFsGenerator

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDDS-4094?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated HDDS-4094:
---------------------------------
    Labels: pull-request-available  (was: )

> Support byte-leve write in Freon HadoopFsGenerator
> --------------------------------------------------
>
>                 Key: HDDS-4094
>                 URL: https://issues.apache.org/jira/browse/HDDS-4094
>             Project: Hadoop Distributed Data Store
>          Issue Type: Improvement
>            Reporter: Marton Elek
>            Assignee: Marton Elek
>            Priority: Major
>              Labels: pull-request-available
>
> Teragen seems to use the byte level write method of FSDataOutputStream (write(byte) is used instead of write(byte[], int, int)).
> It seems to be a good idea to extend existing `ContentGenerator` of ozone to support the write in smaller chunks to make it easier to reproduce performance problems.
> Note: statistics from FileSystem  instance:
> {code}
> Closing file system instance: 1257412274
>    write.call: 100001066
>    write.allTime: 215951
>    hsync.call: 1
>    hsync.allTime: 3
>    hflush.call: 0
>    hflush.allTime: 0
>    close.call: 4
>    close.allTime: 62
> {code}
> This was a teragen test with 1GB data (and statistics from one container). write method seems to be called multiple times which means smaller write buffer.



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