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From "Sanjay Radia (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4028) QJM: Merge newEpoch and prepareRecovery
Date Fri, 19 Oct 2012 17:26:12 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4028?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13480150#comment-13480150

Sanjay Radia commented on HDFS-4028:

This has been discussed quite a bit in HDFS-3077. The rationale is simplification and being
the same as a well-proven ZAB protocol. ZAB/Paxos are complex and if we stick to proven protocols
it makes it easier for folks to understand and maintain. Further, in order to make HA rock
solid, it makes sense to stick to well proven solutions to the degree that those solutions
> QJM: Merge newEpoch and prepareRecovery
> ---------------------------------------
>                 Key: HDFS-4028
>                 URL: https://issues.apache.org/jira/browse/HDFS-4028
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha, name-node
>            Reporter: Sanjay Radia
>            Assignee: Suresh Srinivas
>             Fix For: QuorumJournalManager (HDFS-3077)

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