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https://issues.apache.org/jira/browse/HDDS-17724?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated HDDS-17724:
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Labels: pull-request-available (was: )
> Limit command-status report size in datanode heartbeats
> -------------------------------------------------------
>
> Key: HDDS-17724
> URL: https://issues.apache.org/jira/browse/HDDS-17724
> Project: Apache Ozone
> Issue Type: Bug
> Reporter: Sadanand Shenoy
> Assignee: Sadanand Shenoy
> Priority: Major
> Labels: pull-request-available
>
> HDDS-16723 introduced a count-based limit for reports included in each
> datanode heartbeat. However, it does not account for serialized report size.
> A small number of {{CommandStatusReportsProto}} messages containing
> accumulated delete-block ACKs can still produce a heartbeat exceeding
> {{{}ipc.maximum.data.length{}}}.
> Add a configurable command-status byte limit, defaulting to 64 MB. The
> effective budget is also restricted by the remaining space within 90% of the
> IPC maximum message size.
> Oversized aggregate reports are split only between complete {{CommandStatus}}
> entries, preserving each delete ACK atomically. Deferred reports remain
> queued for later scheduled heartbeats. The immediate follow-up heartbeat is
> removed to avoid burst RPCs during backlog recovery.
> Add per-endpoint metrics for queued, sent, deferred, requeued, and oversized
> command-status bytes.
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