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https://issues.apache.org/jira/browse/HDDS-10341?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Devesh Kumar Singh updated HDDS-10341:
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Summary: Implement a task/framework in Recon to sync full/delta SCM
Metadata DB updates at regular intervals. (was: Implement a task in Recon to
sync full/delta SCM Metadata DB updates at regular intervals.)
> Implement a task/framework in Recon to sync full/delta SCM Metadata DB
> updates at regular intervals.
> ----------------------------------------------------------------------------------------------------
>
> Key: HDDS-10341
> URL: https://issues.apache.org/jira/browse/HDDS-10341
> Project: Apache Ozone
> Issue Type: Sub-task
> Components: Ozone Recon
> Reporter: Devesh Kumar Singh
> Assignee: Devesh Kumar Singh
> Priority: Major
>
> For Recon to have an accurate and updated information related to various
> states of containers, blocks pending for deletion or to process any other SCM
> metadata information in Recon, it is important to have full SCM DB snapshot
> sync at startup of Recon or fall back on full SCM DB snapshot in failure
> scenarios like while applying delta updates from SCM metadata DB.
> There are some gaps where Recon may not know of updates in SCM metadata. E.g.
> Recon may be down and during downtime, some containers may get created and
> deleted in SCM, so Recon will never get to know about such containers even
> when it is started again.
> If we implement delta updates and during Recon downtime, this sync task will
> try to sync SCM DB delta updates since its rocks DB last sequence number and
> apply all delta updates to various SCM tasks in Recon.
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