We have two VDISKs and one real disk for swap area for each zLinux server. We run SWAPGEN on all of them every time we boot CMS, but as you point out, it only has to be done once for the real disk.
The VDISK are 10% and 5% of memory size (up to VDISK maximum. The real disk is 800 cyl. I'm not sure why we did that. (Other recommendations are welcome.) I remember IBM suggested swap = 10-15% of memory, and to use VDISK. I don't remember where the real disk came from, though. The theory is we track when the third (real) disk is used. But we never set that up. (I guess I'd better ask Velocity Software how to alert for that.) Alan Ackerman alan.ackerma...@gmail.com > On May 16, 2016, at 4:18 PM, Mark Post <mp...@suse.com> wrote: > >>>> On 5/16/2016 at 04:40 PM, "Cohen, Sam" <sam.co...@lrs.com> wrote: >> I use the Format/Reserve to use the DIAG driver, which I've found to be more >> efficient than the FBA driver. > > If you're using real DASD, you don't need to keep re-writing swap signatures > after the first time. That's only necessary with TDISKs or VDISKs where > you're not sure if it's "new" or not. > > > Mark Post > > ---------------------------------------------------------------------- > 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/
