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Please refer to the document "Using Load-Balancers with Oracle E-Business Suite Release 12 (Doc ID 380489.1)" - section 2.2
Routing of the concurrent requests depends on how we define the managers. If we define a manager on node1 and include a particular conc. program to that manager then we can have the conc. jobs (related to this program) running on that particular node.
Just an update:
I'm still working on this project and we are making good progress.
The 4 apps nodes are working fine, accepting http/web/forms on its own hostname/url/po.rt.
The shared apps file system is running on OCFS.
DNS and Squid Reverse Proxy instead of HardwareLoadbalancer.
Being a non-RAC instance, I have not configured concurrent managers in PCP.
What I have is a PCP failover using primary to secondary node.
I'm still need to research if its feasible to create a specialized concurrent manager and assign it to other apps node.
Am also reading up on how to configure Specialization rule and Combined specialization rule and assign it to specialized Conc Manager.
If I get more free time I will prepare a detailed step-by-step HOWTO guide and share it here and on my blog.
What we are running are the ff:
EBS R12.1.3 Linux 64bit
1 node DB on OEL 5.9
4 node Apps on OEL 5.9
OCFS2 for shared everything apps storage (including INST_TOP)
DNS and Squid Reverse Proxy