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https://issues.apache.org/jira/browse/HDDS-4094?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Attila Doroszlai resolved HDDS-4094.
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Fix Version/s: 0.7.0
Resolution: Implemented
> 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
> Fix For: 0.7.0
>
>
> 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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