[jboss-as7-dev] Server Group equals Cluster?

[Brian Stansberry]

Exactly.

The foundation of the AS's clustering features are JGroups channels 
where the instance of a channel on a given server discovers its peers 
and exchange messages in a peer-to-peer topology. That discovery and the 
ability to properly exchange messages depends on a consistent 
configuration between the members of the cluster.

A server group is the logical way to achieve that consistent configuration.

However, if the user configured two server groups with the same 
clustering configuration and the servers in the two groups were visible 
to each other over the network, all the servers would form a single cluster.

On 6/8/11 5:39 AM, Dimitris Andreadis wrote:
> AFAIK, a server group translates to a shared configuration and cluster (capability) is
> orthogonal to a server group. I.e. you could have a cluster span 2 different server groups.
>
> However, in most cases a cluster will be implemented as a server group.
>
> On 08/06/2011 11:19, Heiko Braun wrote:
>>
>>
>> Can somebody shed some light on the relation between server groups
>> (or domains in general) and clustering?
>>
>>
>> Ike
>>
>>
>>
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>


-- 
Brian Stansberry
Principal Software Engineer
JBoss by Red Hat