Synchronizing multiple servers with other servers

[WalkaboutTigger]

I have an application, A, running on a load balanced set of servers. Part of this application is to upload logo images. This set of servers must contain the same set of images. Additionally, I have a second application, B, which is also load-balanced and must also have a complete copy of all logo images.

Would the best architecture for this be that I have a pair of fault-tolerant "replication" servers or have N-way replication between the servers such that each server in A replication with all other servers in A and servers B replicating with the servers in A?

Your help and recommendations are appreciated.

Thanks

[TGRMN Software]

I would try real-time replication between A1, A2, A3 ... real-time replication between A1 and B1 and real time replication between B1, B2, B3 etc. the limitation is that VVLauncher can only run 1 profile currently. You should try to see if VVLauncher can monitor folder remotely.
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[WalkaboutTigger]

We considered this option. The replication breaks down, however, if A1 or B1 fail. The solution MUST be fault tolerant and not rely on a single machine.

We are considering building two machines, Replication Primary (R1) and Replication Secondary (R2), such that R1 maintains replication on all A and B servers as well as itself and R2. R1 and R2 would be running a not-yet-internally-developed heart-beat system and in the event R1 fails at the replication level or above, R2 will take over and send an alert.

I would rather use off-the-shelf solutions for the heart-beat, but know of no such solution at this time.

Any suggestions?

[WalkaboutTigger]

*BUMP*

This is still an outstanding issue - when will VVLauncher support multiple simultaneous profiles? Win2k and Win2k3 are multi-threaded environments so why is VVLauncher limited to a single replication profile?