We just put in a 114 and run z/OS on 2 LPARs and z/VM on 2 other LPARs with several guests under the VMs As a POC your approach will work but there are a few things to consider for the long run. 1) Unless you are running your CPs at full throttle, Linux will do much better on IFL engines which aren't kneecapped - we can't afford the 3rd party software licenses on z/OS for full-bore CPs so we have a couple of IFLs for VM and the Linux guests to run on ; 2) If you decide to go production with Linux, then you will end up with VM since Linux gets more useful as you use it and you can't put enough LPARs on a mainframe to satisfy the demand. Plus, it's much faster to spin up a guest than to build a new LPAR, and less disruptive, too. Also, VM's resource management capabilities far exceed those of Linux and you won't need to feed the memory/swap beast too heavily as compared to bare-metal Linux(s). 3) Personnel-wise, we find that we have about 1 1/2 FTE involved in the care and feeding of a total of 8 VM LPARs on 1 z114 and 1 z196 with a couple of hundred Linux guests spread over them.
-----Original Message----- From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Spring, David Sent: Thursday, July 26, 2012 7:28 AM To: LINUX-390@VM.MARIST.EDU Subject: z/Linux and z/OS Good morning all, Hope this is the right place to ask this question. Please pardon the intrusion if I should be posting this someplace else. Our management is considering the acquisition of a new z114 "sandbox" system primarily for testing new hardware (DASD and tape). They would also like to conduct a z/Linux POC using the same machine. I know that z/Linux can run in native mode on a System z processor but I wasn't sure about it running side by side with z/OS. Can this be done using PR/SM and building separate LPARs on the z114 for running z/Linux and z/OS together on the same machine? I know that the most sensible solution would probably be to get a z/VM hypervisor and run z/OS and z/Linux as guest operating systems under it. However, there's a lot of resistance here to running yet another operating system such as z/VM. Any comments, advice, etc.? David Spring Social Security Administration DCS/OTSO/DMSS/MOSB MVS Operating System Team Desk: (410) 965-9309 BB: (443) 379-7839 Email: david.spr...@ssa.gov ---------------------------------------------------------------------- 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/ DISCLAIMER: This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited. ---------------------------------------------------------------------- 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/
