Oracle Apps Architecture

Oracle Apps has a 3 tier architecture.

First tier is that database server which stores whole of data.

Second tier is the application tier-also called Middle tier where forms server, web server, reports server, concurrent processing server, admin server, discoverer server resides.

Third tier is the client desktop which should be java enabled.

Now we can have a single node configuration or multi-node configuration. In single node we have the database and all middle tier components on a single node(i.e single physical server).

However in multi-node we can distribute the middle tier components, in the way we like. Typically, we can have database, admin server, reports server,concurrent managers on 1st node and forms & web server on 2nd node. Another possible configuration is having database on first node, Admin server, reports server, concurrent managers on second node and forms and web server on 3rd node. So this is a 3 node configuration.

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