[jboss-jira] [JBoss JIRA] (JGRP-1649) RELAY2: everyone can be a site master

[Bela Ban (JIRA)]

Bela Ban created JGRP-1649:
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             Summary: RELAY2: everyone can be a site master
                 Key: JGRP-1649
                 URL: https://issues.jboss.org/browse/JGRP-1649
             Project: JGroups
          Issue Type: Feature Request
            Reporter: Bela Ban
            Assignee: Bela Ban
             Fix For: 3.4


The site master can become a bottleneck if we have a lot of traffic between sites. Also, forwarding messages to a local site master and the site master of the target site forwarding messages to the final destination generates additional traffic.

Therefore, allow every member to become a site master:
* Every member joins the local cluster (site) *and* the global cluster
** Everyone (as a site master) maintains a routing table that consists of target sites ("sfo") and a list of site masters
* When a message is received whose destination is SiteMaster"sfo"), we pick a random member of the list for "sfo" and relay the message to it
* The target site master then receives and possibly forwards the message to the final destination (if it isn't the final dest)

Not sure yet if this will be a new protocol (RELAY3) or whether RELAY2 will be enhanced.

Also, investigate whether it makes sense to make only a *subset* of the site nodes site masters. This would still require local forwarding from non site masters.

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