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From "Nanda kumar (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDDS-450) Generate BlockCommitSequenceId in ContainerStateMachine for every commit operation in Ratis
Date Tue, 09 Oct 2018 12:28:00 GMT

    [ https://issues.apache.org/jira/browse/HDDS-450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16643254#comment-16643254
] 

Nanda kumar commented on HDDS-450:
----------------------------------

+1, I will commit this shortly.

> Generate BlockCommitSequenceId in ContainerStateMachine for every commit operation in
Ratis
> -------------------------------------------------------------------------------------------
>
>                 Key: HDDS-450
>                 URL: https://issues.apache.org/jira/browse/HDDS-450
>             Project: Hadoop Distributed Data Store
>          Issue Type: Bug
>          Components: Ozone Datanode
>            Reporter: Shashikant Banerjee
>            Assignee: Shashikant Banerjee
>            Priority: Major
>         Attachments: HDDS-450.001.patch, HDDS-450.002.patch
>
>
> BlockCommitSequenceId will be increasing long value generated in the Ratis leader for
every commit operation of a block and will be replicated over to the followers. This id will
be updated in OM and will be reported to SCM which will help the most consistent copy of a
open container replica in case the majority of the datanodes fail.
> The blockCommitSequenceId is same as the commit index of the flush(PUT_BLOCK) transaction
in Ratis.



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