1. Network performance project
Topic: simulation of a variable rate server system
Done by: Zhang Rui ( )
Zheng Siyi ( )
Overview of variable rate server system
Application
High level design of simulation
Low level design of simulation

2. Variable rate server system
One Queue
Multiple server
Different process rate for each server
Sequence of the serve oder

3. Application used in switch simulation Used in local area network
For communication of clients in the local network
It is a variable rate server system
In our design it have different process speed for each server

4. Application
Overview of the simulation

5. Application Purpose of this simulation
Cost of different speed of server
Cost of multiple server
Use this simulation to find out the most economic and reasonable way for setting up the number and speed of the server

6. High level design
packet generator: which will simulate the packet generation rate of a
company
servers: the different rate server
output: the total arrival rate for the whole system, and different
arrival rate for each server
packet generator

7. Low level design
Each coming in packet will check the last finish time of server-1, if the
last finish time of server-1 is smaller than the time of current packet, the
packet will be served by server-1, if not, check server-2, if server-2 is
also not available then check server-3, if server-3 also not available,
then wait for any server finish.

8. Result of the simulation
There have 4 results of this simulation:
Total arrival rate
Arrival rate for server-1
Arrival rate for server-2
Arrival rate for server-3
By finding out these arrival rates we can adjust the speed and number of
multiple servers, then to choose a reasonable speed and number of
servers