This link will answer some of your questions:
DSAs - CA Directory - 14.0 - CA Technologies Documentation
Also, here some more explanation:
- How to configure data DSAs inside a router DSA using management console? i.e, How router DSA will understand that which DSAs will receive its requests.
- Once you have a Router and Data DSA created, go to the Router DSA in the Topology view within the Management UI, and click on Edit.
- In the Edit mode, click on the 'Knowledge Group' tab, and on the left pan Window, you will see the available DSAs.
- Here you will move the Data DSAs that you want the Router DSA to have knowledge of, to the right pane window.
- By doing this you are give the Router DSA knowledge of the Data DSA's.
- Can we configure router DSA to either Load balance or fail over the requests to data DSAs?
- By doing the above it essentially will act as a "Load Balancer". This is because the Router DSA will always be aware of the status of it's Data DSAs. So it will route the request to the best available Data DSA.
- While configuring the default Policy store objects, do we need to point each data DSA to the Policy server or only the router DSA?
- Policy Store -> Router DSA
- Router DSA -> Data DSA
- Pointing the Router DSA to the Data DSA, is the configuration in the above item #1
- Does router DSA setup provide better performance than the data DSA setup? Any article/discussion link will be helpful
- Yes, the Router DSA provides better reliability, because as mentioned it is always aware of the status of it's DSAs.
- So, if one Data DSA is not available to accept requests, the router will send the request to the next available.
- Regards. Vijay