Net Bandwith: X-Server vs PC Client/Server

I am trying to choose between two architectures for a project:

1. "Standard Client/Server"

  PC ----------------------- LAN or WAN ---------------- Relational DB


  (Powerbuilder)					(Sybase/Oracle)

2) "Application Server"

  PC ---- LAN or WAN ------ UNIX application server --- LAN --- Relational DB
(running an X server) (running the App in Motif) (Sybase/Oracle)

THE QUESTION IS WHICH ARCHITECTURE HAS LOWER BANDWIDTH REQUIREMENTS TO THE PC'S?

In the first architecture, the application is written on the PC. All data has to move from the DB across the LAN/WAN to the PC. All display is handled on the PC (TRAFFICE = DATA). In the second architecture, the data stops at the application server, only display information for X (Motif) needs to move across to the PC (TRAFFIC = DISPLAY).

Does anyone have information on how these two architectures will compare with respect to bandwidth requirements?

Please mail responses to sbchanin_at_ai.mit.edu. I will summarize for anyone who is interested in the results.

Thanks,
Steve

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DOMAIN: sbchanin_at_ai.mit.edu                                       Steven Chanin