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https://issues.apache.org/jira/browse/HDDS-16720?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gargi Jaiswal updated HDDS-16720:
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Summary: Count SCR GetBlock bytes in both bytesGetBlock and
localBytesGetBlock (was: Short-circuit GetBlock ops are counted in both
numGetBlock and numLocalGetBlock)
> Count SCR GetBlock bytes in both bytesGetBlock and localBytesGetBlock
> ---------------------------------------------------------------------
>
> Key: HDDS-16720
> URL: https://issues.apache.org/jira/browse/HDDS-16720
> Project: Apache Ozone
> Issue Type: Bug
> Components: Ozone Datanode
> Reporter: Elavarasan Kathirvel
> Assignee: Gargi Jaiswal
> Priority: Minor
> Labels: short-circuit-read
>
> When Short-Circuit Read (SCR) is enabled and a co-located client reads a key
> via the domain-socket path, {{numLocalGetBlock}} correctly increments — but
> {{numGetBlock}} also increments, even though SCR did not use the remote/gRPC
> read path.
> This makes {{numGetBlock}} unreliable for SCR validation and causes
> double-counting in datanode metrics.
> *Expected behavior:*
> * SCR reads should increment only {{{}numLocalGetBlock{}}}. gRPC reads
> should increment only {{{}numGetBlock{}}}.
> *Actual behavior:*
> * SCR reads increment both numLocalGetBlock and numGetBlock is incremented
> twice for one read.
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