[infinispan-issues] [JBoss JIRA] (ISPN-4162) Can DIST use multicast when num_owners >= cluster size?

[Dan Berindei (JIRA)]

    [ https://issues.jboss.org/browse/ISPN-4162?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12956891#comment-12956891 ] 

Dan Berindei commented on ISPN-4162:
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Actually, we already have this optimization in place: in {{JGroupsTransport.invokeRemotely()}}, if the size of the recipients collection is the same as the size of the cluster, we send a broadcast. And it does cause ordering problems with DIST_ASYNC and REPL_ASYNC...
                
> Can DIST use multicast when num_owners >= cluster size?
> -------------------------------------------------------
>
>                 Key: ISPN-4162
>                 URL: https://issues.jboss.org/browse/ISPN-4162
>             Project: Infinispan
>          Issue Type: Feature Request
>          Components: Core
>    Affects Versions: 7.0.0.Alpha1
>            Reporter: Paul Ferraro
>            Assignee: Dan Berindei
>
> It would be nice if DIST could conditionally use multicast instead of multiple unicasts when the number of owners to which to send a given command >= the size of the cluster.  In fact, we could probably come up with some configurable ratio of the size of the cluster (perhaps as high as 50%?), above which it is more optimal to use multicast vs multiple unicasts.  This would optimize the use of DIST in smaller, dynamic clusters.
> With such an optimization in place, REPL would be completely obsolete.

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