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From "Alan Conway (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (QPID-3603) New approach to HA
Date Wed, 09 Nov 2011 21:11:51 GMT

    [ https://issues.apache.org/jira/browse/QPID-3603?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13147294#comment-13147294

Alan Conway commented on QPID-3603:

Created branch qpid-3603 to integrate work on this project.
> New approach to HA
> ------------------
>                 Key: QPID-3603
>                 URL: https://issues.apache.org/jira/browse/QPID-3603
>             Project: Qpid
>          Issue Type: Improvement
>    Affects Versions: 0.14
>            Reporter: Alan Conway
>            Assignee: Alan Conway
> The existing cluster code suffers from some maintainability and performance problems.
This is a proposal to write a new HA solution based on the "replicating subscription" that
will replace the current cluster. This is a competing proposal to QPID-2920. 
> Summary: a "replicating subscription" is a special queue browser that can see acquired
and un-acquired messages and also receives dequeue events to replicate remote queue contents.
The new HA solution will create & manage these subscriptions in order to maintain a back-up
of a primary broker on one or more back-up brokers. This is an active-passive hot-standby
configuration, where exactly one broker is primary and the others are secondary. Initially
plan is to use Cluster Suite's rgmanager to enforce the roles and manage fail-over, but we
could support other cluster resource managers (e.g. PaceMaker) in the future.

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