FMS origins in cluster

[Leo?]

Hi,
I need to setup currently only 2 FMS servers. I want used both (in future more
FMS) like "origin servers" It will be used for 1 application (chat and
videochat application) with hundreds clients, so I need same objects,
SharedObjects a list of clients at each FMS server. Is it possible or I will
have to use edge+origin?
Thanks.
Leo?

[techeye]

I can tell you that it is possible :) That said, I suppose you are looking for
information on this type of setup; but you would need to explain some of the
details of how your application is going to work.

[KevinStreeter]

It is definitely possible to do this. You will need to create a proxy
application that runs on each of your FMS servers that are to act as an edge.
Each proxy application will need to create a create a connection (or multiple
connections) to the FMS that is acting as an origin. You will need to relay
changes to the shared objects running on the "edge" servers up to the "origin",
and the "origin" will need to propogate these changes to the other "edges".

The biggest challenge you will have will be dealing with race conditions
between the shared objects in the distributed applications. You will need to
use some kind of transaction id to identify conflicts, and you will need a
policy to resolve the conflicts. It may be easier in this situation to
simulate shared objects on the edges by using RPC calls that are proxied up to
the origin.

If this is starting to sound like alot of work...it is! I highly recommend
using FMS's own edge-origin feature which will handle all of these details for
you, and give you the added benefit of content caching, administration, etc.
The FMS is powerful enough to implement this behavior, but we built the edge
origin to save you the trouble of implementing yourself.

Good Luck!

[Leo?]

I was thinking about create "proxy" application, that will handle every
changes... But it is a lot of work :smile;
So, when I will have only 2 FMS servers - 1 edge and 1 origin, will I get any
benefit? I see no redundancy and no increases of clients capacity (or very
small) . I guess that for redundancy I will need minimal 4 servers (2 edges and
2 origins). am I right? And when FMS cost c. 7,222$ (in our country) it isnt
just cheap for start
Leo?