Mark Post
Sun, 31 Jan 2010 13:42:55 -0800
>>> On 1/31/2010 at 02:24 PM, Walter Wojcik <wal...@abinitio.com> wrote: > The mainframe is a z9 BC class machine. The disks are hosted by a DS6000 > where each zLinux instance will have its own LCU (Logical Control Unit) > > If I chose to only use zVM 5.4 could I run all 3 zLinux images in the > single LPAR and use CP SHAREs to hard cap the Test and Sandbox images (for > example, SHARE ABSOLUTE 12.5% LIMITHARD and SHARE ABSOLUTE 5.0% LIMITHARD > as suggested in another reply)?
Absolutely. That's why those controls are there in z/VM. I personally would avoid using LIMITHARD unless absolutely necessary. (I'm not a performance expert in any way, shape, or form, so take this with some salt.) If you use LIMITSOFT, and your important Linux guest(s) aren't using the processors, these other images will be able to use that additional capacity. I always find it frustrating to see my lower-priority guests chugging along slowly because of a LIMITHARD, and the whole machine is otherwise pretty idle. 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