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https://issues.apache.org/jira/browse/HDDS-8047?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wei-Chiu Chuang reassigned HDDS-8047:
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Assignee: Wei-Chiu Chuang
> [hsync] PutBlock request has lots of redundant metadata
> -------------------------------------------------------
>
> Key: HDDS-8047
> URL: https://issues.apache.org/jira/browse/HDDS-8047
> Project: Apache Ozone
> Issue Type: Sub-task
> Reporter: Wei-Chiu Chuang
> Assignee: Wei-Chiu Chuang
> Priority: Major
> Attachments: after_hdds_8047.html, hbase_rs.html,
> image-2023-04-19-15-11-23-576.png
>
>
> In a profile result, we found that the client PutBlock request has lots of
> redundancy, especially the BlockData structure. The data structure contains
> the metadata of every chunk in the block, which is not required because only
> the last two chunks matters.
> This is especially critical for small and frequent puts, such as hsync API
> called by HBase WAL files. We found that at least 60% of client CPU cycle
> during hsync call can be attributed to this problem, and potentially a huge
> impact to the latency.
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