[jboss-jira] [JBoss JIRA] (JGRP-592) Pluggable policy for picking coordinator

[Bela Ban (JIRA)]

    [ https://issues.jboss.org/browse/JGRP-592?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12793763#comment-12793763 ] 

Bela Ban edited comment on JGRP-592 at 7/30/13 6:57 AM:
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The new merge policy tries to minimize moving the cordinator around (JGRP-1002). It works by picking the coordinator of the MergeView as the first elements of the sorted set of all subview coordinators. If we have \{A,B,C\}, \{M,N,O\} and \{X,Y,Z\}, then the new coordinator will be either A, M or X, but not any of the other members.
The rest of the subview ordering is left untouched, e.g. if we pick M as new coord, the MergeView will be \{M,A,B,C,N,O,X,Y,Z\}.
                
      was (Author: belaban):
    The new merge policy tries to minimize moving the cordinator around (JGRP-1002). It works by picking the coordinator of the MergeView as the first elements of the sorted set of all subview coordinators. If we have {A,B,C}, {M,N,O} and {X,Y,Z}, then the new coordinator will be either A, M or X, but not any of the other members.
The rest of the subview ordering is left untouched, e.g. if we pick M as new coord, the MergeView will be {M,A,B,C,N,O,X,Y,Z}.
                  
> Pluggable policy for picking coordinator
> ----------------------------------------
>
>                 Key: JGRP-592
>                 URL: https://issues.jboss.org/browse/JGRP-592
>             Project: JGroups
>          Issue Type: Feature Request
>            Reporter: Bela Ban
>            Assignee: Bela Ban
>            Priority: Minor
>             Fix For: 3.4
>
>
> Make policy to pick coordinator pluggable. Pick new coordinator after existing coordinator crashes by calling this policy.
> Default policy is to pick the next in line.
> Other policies could pick the next in line from a set of pinned coordinator, so certain members can never become coordinators.

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