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https://issues.apache.org/jira/browse/HDDS-4666?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Attila Doroszlai updated HDDS-4666:
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Target Version/s: (was: 1.4.0)
> Handling disk issues in Datanodes
> ---------------------------------
>
> Key: HDDS-4666
> URL: https://issues.apache.org/jira/browse/HDDS-4666
> Project: Apache Ozone
> Issue Type: Bug
> Components: Ozone Datanode, SCM
> Reporter: Shashikant Banerjee
> Assignee: Shashikant Banerjee
> Priority: Major
> Attachments: Hdds datanode disk(volume) handling issues.pdf
>
>
> Currently, there is no notion of reserved space on datanodes as it exists on
> hdfs datanodes. Similarly, a datanode low on disk capacity continues to
> participate in pipeline allocation activity and keep on receiving write
> requests and these requests fail and potentially will end up running into
> retry loop in the client.
> Similarly, ratis log disks are currently not accounted for by disk checker.
> Once a ratis disk gets full, existing pipelines can not be closed as closing
> of pipeline involves taking a ratis snapshot which will not succeed if the
> ratis disk is full. Similarly, new pipelines cannot be functional on such
> disks and will end up failing write requests and contribute in client retry
> chain.
> Similarly, nodes low on disk capacity should not be choosen as targets for
> container re-replication.
> The goal of the Jira is address disk related issues on datanodes holistically.
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