Rick, I have never actually tested this, but vmware ESX runs directly on the hardware (no host OS required) and may be able to run an instance of vmware as a guest. I'm struggling to come up with a reason why this would be a useful thing to do however..
-Sam -----Original Message----- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Rick Troth Sent: Thursday, January 05, 2006 8:37 AM To: [email protected] Subject: Re: z/Linux to p/Linux Just speculation on my part, but ... Linux for pSeries (and the pSeries "hypervisor") is now getting to a level where IBM wants to market it. Good! So there is surely going to be a push. Personally, I'm pretty serious about V12N, so I deal a hard hand to IBM on this one: The pSeries equiv of PR/SM requires a cooperative guest. (I say "guest" for lack of a better term. No one called pSeries LPAR a VM kind of thing.) What I mean is, current AIX and Linux will do the right thing, but older AIX and Linux (and any other op sys you might run on p) might not play by the rules. To be specific, unless some Austin IBMer wants to correct me, an op sys which does not voluntarily yield will get a whole CPU instead of a fractional slice. This single point dims my opinion (though not at all to the point of not using pSeries, just that z is "true V12N" capable). Apply this test: Run z/VM on top of z/VM on top of z/VM on top of z/VM ... try THAT with pSeries. Won't work. Try it with VMware. Won't happen. (Try it with MS Virtual Server, it just might work, I don't know.) Does this make sense? The zSeries architecture (and all marketted hypervisors for it) are fully effective at isolating guests from each other. No other hypervisor or para-virtualization utility gets all the way there yet. (Now, emulators CAN do it, but they incur more overhead.) -- R; On Thu, 5 Jan 2006, Ceruti, Gerard G wrote: > copied from IBM-MAIN > > Anyone know about this ?? > > Regards > Gerard > > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf > Of John S. Giltner, Jr. > Sent: 05 January 2006 05:04 AM > To: [email protected] > Subject: Re: z/Linux to p/Linux > > John R. Grout wrote: > > If IBM de-emphasizes z/Linux, it would almost certainly be in favor of > > p/Architecture (and p/Linux) rather than in favor of z/OS (or z/VM). > > > > As pure speculation... I would not be surprised to see mixed > > p/Arch-z/Arch sysplexes sharing high-powered hierarchal file systems > > (or raw files) using the coupling facility (NB... a raw file is a > > physical or logical file system partition with low-level access... > > somewhere between Media Manager and I/O driver level). > > IMHO if IBM de-emphasizes z/Linux they will be pushing Linux on blades. > Infact I think they will be pushing either VMWare and/or Zen on Linux and > create many virtual Linux images on each blade. > > If you look at the BladeCenter archictecture it is simular to what they have > in the mainframes to day, at a highlevel that is. > > I can see IBM developing microcode to allow the blades (think books in the > z990 and z9) to appear to be one box and to logical partition. You could > have 14 2-way blades with 8 GB RAM each or a total of 28 CPU's and > 112 GB of RAM. They all share the same FiberChannel, Ethernet, and/or > Infiband connections. Could be the next "mini-mainframe." > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, send email > to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the > archives at http://bama.ua.edu/archives/ibm-main.html > > ________________________________________________________________________ __________________________________________________________ > > Standard Bank Disclaimer and Confidentiality Note > > This e-mail, its attachments and any rights attaching hereto are, unless the context clearly indicates otherwise, the property of Standard Bank Group Limited > and/or its subsidiaries ("the Group"). It is confidential, private and intended for the addressee only. 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