Hi, On 19/04/05 21:13, Gilad Ben-Yossef wrote: > MOSIX/OpenMOSIX is a great > academic excersize - a working academic excersize, but not something I > would use except for very specific and narrow taks in controled conditions.
That's consistent with my experience. Here at the Weizmann Institute, the IT department built a MOSIX-based cluster out of a dozen high-end machines. It failed miserably. AFAIK, the main problem was that migration just never happened for most user processes (even after fixing the default setup which disallows migration of anything invoked via ssh, which wasn't documented anywhere). To start with, anything that used shared memory and (IIRC) threads couldn't migrate. Also, anything that did noticable amounts of I/O got locked to its home node, even though everything was running on an NFS-mounted filesystem anyway [1]. Since all processes on the cluster had the same home node (i.e., the formal gateway to the cluster which everybody sshed to), they ended up having one overloaded node and 11 nearly idle machines. Eran [1] In theory it might have been possible to work around that using the distributed FS that comes with MOSIX/OpenMOSIX, but I wouldn't bet on it. I wildly guess it would require a major migration and have some funny stuff non-Unix semantics, and my general impression was that the FS is half-baked. ================================================================= To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
