Also, ensure that the machines involved are on the same subnet and
support multicast traffic.
Refer to following FAQ entry for some guidance on this.
http://wiki.glassfish.java.net/Wiki.jsp?page=FaqBasicMulticastTestBetweenMachines
Sudhir Prabhu wrote:
> Hi Balbir,
>
> Please refer to
> http://developers.sun.com/appserver/reference/techart/glassfishcluster/#clustArch
>
> Relevent portions from this article are here.
>
> In the GlassFish application server, cluster instances are organized
> in a ring topology. Each member in the ring sends memory state data to
> the next member in the ring, its replica partner, and receives state
> data from the previous member. As state data is updated in any member,
> it is replicated around the ring. The topology is shown in simplified
> form in figure3
> Clustering Topology
>
> The way the topology is formed into a ring is determined by
> alphanumeric order of the names you give to your instances. So, if you
> name your instances as shown in Figure 3, Instance 1 will replicate to
> Instance 2, Instance 2 to Instance 3, and so on around the ring.
>
> A typical cluster topology is shown in Figure 4. In the figure,
> instances are shown hosted on different physical machines. By placing
> Instances 1 and 3 on one machine and Instances 2 and 4 on a different
> machine, you maximize availability. If either machine fails
> catastrophically, all the data is preserved on the other machine,
> either in its original form or as replicants of the instances on the
> failed machine.
>
> Typical Cluster Topology
>
> Sudhir
>
> Balbir Bhogal (India) wrote:
>>
>> Hi,
>>
>>
>>
>> We are trying to achieve the following shown in the diagram using
>> clustering. We are able to do the red part successfully but
>>
>> have some doubts in the blue part.
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> Issue: - The session data persist for the instances of one node
>> (Host1) but lost for the instances belong to another node (Host2).
>>
>>
>>
>> Note: - There is only one domain.
>>
>>
>>
>> Please check the attached document containing the steps which were
>> followed to achieve the above.
>>
>>
>>
>> Need suggestions.
>>
>>
>>
>> Thanks
>>
>> Balbir Singh
>>
>>
>>
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