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https://issues.apache.org/jira/browse/HDDS-6832?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Uma Maheswara Rao G reassigned HDDS-6832:
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Assignee: Ritesh Shukla
> Avoid blockToken creation for listKey in OM
> -------------------------------------------
>
> Key: HDDS-6832
> URL: https://issues.apache.org/jira/browse/HDDS-6832
> Project: Apache Ozone
> Issue Type: Improvement
> Reporter: Rajesh Balamohan
> Assignee: Ritesh Shukla
> Priority: Major
> Labels: performance
> Attachments: Screenshot 2022-06-03 at 11.14.11 AM.png
>
>
> {color:#172b4d}This is based on a pure lookup test done based on "warp"
> client ([https://github.com/minio/warp).] Lookup test can be performed via
> "stat" option in warp.{color}
> {color:#172b4d}Issue: {color}
> {color:#172b4d}===={color}
> Block tokens are added even when performing listKey in
> OzoneManagerRequestHandler.
>
> Reference:
> [https://github.com/apache/ozone/blob/master/hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/KeyManagerImpl.java#L387-L388]
> !Screenshot 2022-06-03 at 11.14.11 AM.png|width=2590,height=1469!
> BlockTokens are needed mainly for input/outputstreams. It may be alright not
> to generate blocktokens for listKeys. It should be made optional on when to
> generate block tokens depending on incoming request.
>
> Here is the profiler snapshot showing *80-90% of CPU getting burnt out* only
> in generating the blocktoken in listKey.
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