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https://issues.apache.org/jira/browse/HDDS-9222?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sumit Agrawal updated HDDS-9222:
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Attachment: DN cache.docx
> Write chunk cache blocking ratis for slow follower
> --------------------------------------------------
>
> Key: HDDS-9222
> URL: https://issues.apache.org/jira/browse/HDDS-9222
> Project: Apache Ozone
> Issue Type: Improvement
> Components: Ozone Datanode
> Reporter: Sumit Agrawal
> Assignee: Sumit Agrawal
> Priority: Major
> Labels: proton
> Attachments: DN cache.docx
>
>
> writeChunk when try to add to cache is blocking, as cache might be full. This
> can happen,
> * follower DN is very slow
> * follower DN is down
> Under this situation, close container and pipeline will be stuck for the
> ratis is its blocked.
>
> As part of this, need write chunk being throttled, either,
> * rejecting request
> * OR going ahead without cache – Need handle parallel readChunk which can
> fail in this scenario (HDDS-2542 - handle this scenario with certain
> limitation)
>
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