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From "Yiqun Lin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDDS-737) Introduce Incremental Container Report
Date Mon, 05 Nov 2018 10:07:00 GMT

    [ https://issues.apache.org/jira/browse/HDDS-737?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16674905#comment-16674905
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Yiqun Lin commented on HDDS-737:
--------------------------------

Thanks for giving the summary note, [~nandakumar131]. It helps me a lot.
 I have one comments for the behaviour for ICR triggering. I prefer to add additional try-catch
for {{thread.sleep}} and get InterruptedException. At least, we can know there is a triggering
for the ICR.

Can we have a new unit test for the incremental container report? Major change of the test
is the refactoring. More test cases we can complete gradually in follow-up JIARs

> Introduce Incremental Container Report
> --------------------------------------
>
>                 Key: HDDS-737
>                 URL: https://issues.apache.org/jira/browse/HDDS-737
>             Project: Hadoop Distributed Data Store
>          Issue Type: Improvement
>          Components: Ozone Datanode, SCM
>            Reporter: Nanda kumar
>            Assignee: Nanda kumar
>            Priority: Major
>         Attachments: HDDS-737.000.patch
>
>
> We will use Incremental Container Report (ICR) to immediately inform SCM when there is
some state change to the container in datanode. This will make sure that SCM is updated as
soon as the state of a container changes and doesn’t have to wait for full container report.
> *When do we send ICR?*
> * When a container replica state changes from open/closing to closed
> * When a container replica state changes from open/closing to quasi closed
> * When a container replica state changes from quasi closed to closed
> * When a container replica is deleted in datanode
> * When a container replica is copied from another datanode
> * When a container replica is discovered to be corrupted



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