On Wednesday, 10/15/2003 at 04:51 AST, "Post, Mark K" <[EMAIL PROTECTED]> wrote: > There are definitely some problems in this area, but I'm not sure how to > isolate them. The folks that run the LCDS seem to think it is with the > qeth/qdio Linux/390 drivers. I see symptoms very similar to what you're > seeing. Random, moderately frequent network "freezes" that clear themselves > anywhere from 1 to 20+ seconds (or more?).
One thing to watch is to ensure that log/swap volumes of very active servers are not on the same dasd volume. I have seen a case where multiple SAMBA servers came to random "stalls" due to contention on the volume. (The swap files were on same volume.) Remember that only one physical I/O can be outstanding on a single disk volume at one time. (In fact, swap files should probably be on vdisks.) Alan Altmark Sr. Software Engineer IBM z/VM Development
