Configuration setup for active-standby and active-active

Question

Hi
Having two sites separated by WAN and want to distribute the load between those two sites as Active-Active setup. want to whether it can be possible to have a active-standby pair at each site if not what is the work around to setup.

Answer 1

I would suggest the following setup as 'best practice' for this requirement.
At site A have a TimesTen A/S pair hosting data in range 'A' - 'M'. This provides local HA for this dataset. Remote readonly subscriber of this A/S pair located at site B. This provides read access to data 'A' - 'M' at site 'B'. in the event of a total failure of site A this remote subscriber can be converted into the active of a new A/S pair (located at site B).
Same setup in reverse for site B.
If the hardware is adequate you only need two machines at each site since you can host the readonly subscriber on the same machine as one of the local A/S pair datastores and if you need to do a site level failover you could host both A?S pair on a single pair of machines. Of course availability will be higher with 4 machines at each site. It is a cost/benefit trade off.
This is really the only viable/supported setup to have both sites active if using IMDB cache.
Chris