Thanx a lot Dallas and David....

I have tried running the DPPC system on the cluster...which has a 
100Mbit/S ethernet (switched) and I obtained the following 
results.

16 nodes  - 9hr 28.54
8 nodes   - 12hr 59:20
4 nodes   - 12hr 27:47
2 nodes   - 21hr 01.55

Previously my system had about 8000 atoms, thats the reason why I 
had a problem as you had suggested. Even here the running time for 
8 nodes and 4 nodes are quite conflicting...How can we explain 
this?

Venky
_______________________________________________________________________
Odomos - the only  mosquito protection outside 4 walls -
Click here to know more!
http://r.rediff.com/r?http://clients.rediff.com/odomos/Odomos.htm&&odomos&&wn