David, we've been running Linux on Z for quite a while, since about 2003 or so. Tech management read about the IFL processor for the z/800, IBM made them a heck of a deal and we had someone step up and offer to support Linux and VM so we were off and running.
Now we're floundering a bit. Tech management still sees the advantages, but we don't have much 'new' Linux workload so in order to grow Linux on Z we have to port existing systems from X to Z. The phrase Linux is Linux is Linux is still true, but the change from Linux on Intel to Linux on Z is not an easy migration. It appears you have to build the z/Linux guest using the s/390 kernel, install the apps and move the data over, so you have to engage your business and development side in acceptance testing to move something that is working to the new platform. The technical side does see some differences, please see the note from Dorothea Mattheus about the CPUPLUGD daemon on July 24. You just don't have the same issues for Linux on Intel. I strongly believe you should run your POC. The technology does work as advertised, maybe even better. Just please make sure there is support for the platform where it's needed in the organization before you go live. Roger Oakes -----Original Message----- From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Spring, David Sent: Friday, July 27, 2012 7:02 AM To: LINUX-390@VM.MARIST.EDU Subject: FW: z/Linux and z/OS Good morning again and a happy Friday to all. I wanted to thank everyone who responded to my post yesterday. This listserv looks like a tremendous resource and repository of z/Linux and mainframe knowledge. I'm sure I'll be back soon! 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 -----Original Message----- From: Spring, David Sent: Thursday, July 26, 2012 8:28 AM To: 'Linux on 390 Port' 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/ ---------------------------------------------------------------------- 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/
