On Mon, Apr 23, 2007 at 10:10:51AM -0700, David Brown wrote: > Has there been any sort of tests involving >128 server nodes? > Are there any sort of maximums that would cause problems when the > number of servers and clients gets >1024?
I've run some MPI-IO tests up to 128 clients and servers, but I haven't run those numbers for a little while now. We don't anticipate any problems, though when the number of clients gets much much larger than the number of servers, you might have to do some tuning. As I understand from IRC, you're looking at more like 1-1 ratios (or about on that order), so you should be fine. Naturally, let us know (good or bad) how PVFS does with such a large number of servers and clients. We have some ideas for file layouts that might make sense for 1k parallel clients. > Also I have some other more administrative questions. > Can you run both the client and the server as non-root users? The server can run as a non-root user. The pvfs2-client needs to be able to read the /dev/pvfs2-req device. We always run pvfs2-client as root, but it might be possible to run as some other user once you change the device permissions apropriately. ==rob -- Rob Latham Mathematics and Computer Science Division A215 0178 EA2D B059 8CDF Argonne National Lab, IL USA B29D F333 664A 4280 315B _______________________________________________ Pvfs2-developers mailing list [email protected] http://www.beowulf-underground.org/mailman/listinfo/pvfs2-developers
