On Fri, 22 Apr 2005, Ragnar Lonn wrote: > The problem here is that there can only be ~250 routing tables configured > on the machine. This means that we can only emulate ~250 separate client > machines (boxes with their own MAC addresses) on a single PC. We would > like to emulate about 1000 separate client machines on one PC.
The testbed design is very interesting and I wish you luck with it. However, CPU's and memory don't multiply by magic, nor network bandwidth. I hope the client software uses few CPU cycles and the content is sparing of bandwidth. Also, only one client at a time can bother the server, and the most interesting bugs will be race conditions when multiple clients hit the server simultaneously. You certainly can use UML to host the clients, but you'll probably need several host boxes. A multi-CPU motherboard could be helpful. While hyperthread doesn't really multiply the CPU power, the possibility of multiple threads might be worth the expense of hyperthread processors. You will want to max out the RAM on each host box, because if the clients thrash in and out of the giant swap file, it will slow them down and probably spoil the test. Consider using a single readonly root filesystem, with a separate COW image overlaying it for each guest to write on. That will minimize disc service issues on the host. Good luck with the project! James F. Carter Voice 310 825 2897 FAX 310 206 6673 UCLA-Mathnet; 6115 MSA; 405 Hilgard Ave.; Los Angeles, CA, USA 90095-1555 Email: [EMAIL PROTECTED] http://www.math.ucla.edu/~jimc (q.v. for PGP key) ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ User-mode-linux-user mailing list User-mode-linux-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
