Can LTM be used to configure Active and Passive Servers?

I was specifically wanting to know more about Activation groups. How they are configured and how they are used by LTM during failover, during normal operations and during failback.

 

 

And in addition I wanted to get feeling from other people as to why they are using it. To see if my solution is ok.

 

 

We currently have a layer where LTM -> WS -> DB

 

 

Now to take additional application instead of adding more WS we are planning to do

 

 

LTM -> WS 1 - 4 -> DB1

 

LTM -> WS 5 - 10 -> DB2

 

 

 

Requests going to WS 1 - 4 will have 5 -10 as standby

 

Requests going to WS 5- 10 will have 1 - 4 as standby

 

 

This to prevent one application affecting other when there are application specific issues. At the same time we can use it as failover when DB is down or something like that.

 

 

So that's why I need to understand in detail how failover and failback works. And how it works during normal operation.