Hi Tiago,
I trying to understand your configuration with two machine( say machine1
and machine2).
Configuration 1:
1. DAS on machine1
2. Nodeagent1 on machine1
3. Nodeagent2 on machine2 talking to DAS on machine1
4. Cluster having instance1 with Nodeagent1 and instance2 with Nodeagent2
In this configuration, there is no concept of primary or backup node.
Both instance1 and instance2 are active. They can both service user
requests.
In above case, you can have single load-balancer which load-balance
requests to two instances in Cluster.
You can replicate load-balancer on other machine as well, to avoid
single point on failure. However in this deployment you need a hardware
load-balancer to distribute request to multiple software load-balancer.
Configuration 2:
1. DAS1 on machine1
2. Nodeagent1 on machine1
3. Cluster1 on machine1 having instance1 with Nodeagent1
4. DAS2 on machine2
5. Nodeagent2 on machine2
6. Cluster2 on machine2 having instance2 with Nodeagent2
In above case, you need two load-balancers. One configured with Cluster1
on machine1, and other configured with Cluster2 on machine2.
Now you will need further support such that machine2 with all its
configuration becomes active, when primary machine, i.e., machine1 is down.
Hope this helps,
Kshitiz
glassfish_at_javadesktop.org wrote:
> Hi,
> Thanks for the reply. I will try to follow the guide "http://docs.sun.com/app/docs/doc/819-3679/abdgs?a=browse".
> I would like however to make another question which probably can save me some time.
> I have two different machines and each one is a node in a cluster. Each node as one instance, the typical scenario but in different machines. I have already configured the DAS in both machines to show the same state information, I mean that I can run "bin/asadmin start-domain" on each machine and check the same info.
> I was wondering if the primary node fails, I will have to have the loadbalancer also configured and operational on the backup node. After the failure the backup node becomes the primary.
> So is there any issue of having the load balancer configured on both nodes?
>
> Thanks in advance, Tiago Junqueira
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