[jboss-jira] [JBoss JIRA] (JGRP-1911) Use consensus for some subsystems

[Bela Ban (JIRA)]

    [ https://issues.jboss.org/browse/JGRP-1911?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13456845#comment-13456845 ] 

Bela Ban commented on JGRP-1911:
--------------------------------

Note that {{CounterService}} does exist in the jgroups-raft project. 

> Use consensus for some subsystems
> ---------------------------------
>
>                 Key: JGRP-1911
>                 URL: https://issues.jboss.org/browse/JGRP-1911
>             Project: JGroups
>          Issue Type: Feature Request
>            Reporter: Bela Ban
>            Assignee: Bela Ban
>             Fix For: 5.0
>
>
> Provide options for several subsystems to run with consensus, e.g.
> * {{SEQUENCER}}
> * {{CENTRAL_LOCK}}
> * {{COUNTER}}
> * {{TOA}}
> * Clustered singletons etc
> For example, with the current impl of distributed counters ({{COUNTER}}), the same counter can be available multiple times if we have a split brain. It is currently up to the user to merge counters with different values after a split brain heals.
> This is OK, but we should provide a second implementation, based on jgroups-raft, which uses consensus to determine the counter maintainer in a split brain scenario. This will forfeit availability in favor of consistency.



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