I doubt CP moves the pages unless it needs to pull the page into memory for actual use. Otherwise that would be page migration. A need to move spool is indeed rare. This idea is a mutant variant of the "Do you know where the NSSes are?" notion. Come up clean with 1 spool volume, build your segments, then pull other spool volumes online. Of course this goes back to the day when spooling was done on multiple mod3s. Now I just spool wherever - even 27s - as long as I have tested a SYSTEM RESTART invoked dump to insure that there is enough room to hold the dump.
Now we just need need to update standalone dumping to go to DASD. David -------- Original Message -------- Subject: Re: z/VM page space From: David Boyes <dbo...@sinenomine.net> Date: Thu, June 16, 2011 11:59 pm To: LINUX-390@VM.MARIST.EDU On 6/16/11 7:36 PM, "David Kreuter" <dkreu...@vm-resources.com> wrote: >evil thought. Come up without paging space - paging early life will go >to spool. Have the autolog >machine bring up the real page volumes. Hmm. You know, that might just work in these days of gigabyte real memory configurations. Still no way to force CP to move the pages once they're out there, but we change our spool volumes even less frequently than we do page, and we probably don't really care so much with a small spillover into spool. It's been a while since I've tried that, and I don't remember whether CP tries hard to get that stuff out of the spool areas when more paging space becomes available. > Moving spool a whole 'nuther >thing - so who cares? Apparently nobody but me. 8-) Ask Neale -- this happens all the time here. He patiently listens to me think out loud. But, a "what if" that could avoid a full IPL seems interesting... -- db > ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/ ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
