DASD technology for VM and Linux

2003-04-06 Thread Barton Robinson
Marcy, avoid large disk images for Linux under VM unless it is very low I/O type data. VM does NOT support PAV, MVS does. The only way MVS will support the large dasd with reasonable performance is because of PAV - we don't have it. So if you can, ask for 3390-1 or 3390-3. At this point, I believe

context switching

2003-04-06 Thread Barton Robinson
When somebody tells me something is very fast - I always wonder at the value. Like having a car that will easily do 150MPH on roads supposedly limited to 65mph... It's fun, it's fast, it's expensive, but not all that useful. Though I've heard that context switching is faster - is it relevant? I'v

Re: context switching

2003-04-06 Thread Alan Cox
On Sul, 2003-04-06 at 16:17, Barton Robinson wrote: > When somebody tells me something is very fast - I always > wonder at the value. Like having a car that will easily > do 150MPH on roads supposedly limited to 65mph... It's > fun, it's fast, it's expensive, but not all that useful. The PC is che

Re: context switching

2003-04-06 Thread John R. Campbell
Phil Payne wrote: >> I'm confused. And I've been following this whole discussion from >> the beginning. Can one of you, or any of you, reiterate? > > I've ben here since 1969, and I still get confused. Yup. Mind you, I like to *sow* some confusion, given how often I seem to reap i

Re: context switching

2003-04-06 Thread Paul Raulerson
Well, how about this for confusing then. If you can run Linux/390 on a PC using an emulator, and the emulator cranks out about 12 MIPS on a 1ghz machine, then it is pretty fair to say that the PC is doing something around 12 MIPS, right? (Well, maybe not quite that simple. We do run several set