Michael Simms wrote:
I hope everyone had a safe and happy one Holiday Season.I need some guidance, advice and/or ammunition on an issue that has come up regarding mainframe configuration.I have found myself having to defend the way we are now configured vs. a co-worker who has come back from class saying his instructor said we should run 2 LPARs, one with zVM and zVSE and the other one house our production zLinux and DB2 images. My co-worker has no mainframe experience and does not know our hardware or complete software configuration. Apparently my co-worker fears VSE ‘interference’ with his zLinux images as well as a fear that he would crashthe zVM system. Not sure what he has in his plans that would cause such zVM instability. We currently have: z114, 1 partialCP, 1 IFL, 24GB storage (18/6), 2 FICON cards, 2 OSA cards, 1 zVM LPAR with both CPUs, zVM V6.1, zVSE, zLinux of various flavors SuSE running and DB2 running in several or more zLinuxes. Don’t know how many DB2 zLinux images yet. We already have a couple of production zLinux and are exploring another set of zLinux that would maybe use the zVSE VSAM Redirector and DB2. I suggest that we add to our current configuration as it would better share resources such as memory and I/O. I also feel that it would be easier to manage 1 LPAR instead of 2 LPARs and all their various pieces and parts that would also include zVM test machines and 2 test VSE machines.I have tried to explain how mainframe architecture and zVM havebeen designed as a sharing environment while at the same time protecting against influences from any given guest machine, should the configuration be configured just right. I might have partially agreed with his instructor had not zVM come to support all manner of CPU in recent years, for example accommodating both CP and IFLs. We are also on a limited budget and I don’t know if we’d beable to purchase more storage or Chpids. Based on my years experience, I have poked, prodded and received advice for our system to where we have great performance today, both traditional and non-traditional workloads. Does anyone have suggestion/points to argue one way or theother? Do you have some examples of something similar, one way or another, to what we have or will soon have? You probably would like some more inputvariables? Just let me know and I’ll provide.I appreciate any and all feedback! Thanks. ---------------------------------------------------------------------- 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/
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