Exactly what business problem are you trying to address by doing this? Compare what you're doing to an Intel world implementation. Would you ever place two Intel boxes sharing disk, and with no knowledge of each other, side by side, and boot both systems from the same root disk? What results would you expect to get? How would you control the disk access to avoid collisions? And what business problem do you expect to solve by doing this?
Are you really after a "hot spare" arrangement? Or an active / active cluster? These things would both be realized by creating two different systems, one running in each LPAR. Take a step back and a deep breath, and then look at what you want to do, in terms of how you would do it on separate physical Linux systems. Then fold the technique into your virtual implementation. -- Robert P. Nix Mayo Foundation .~. RO-OE-5-55 200 First Street SW /V\ 507-284-0844 Rochester, MN 55905 /( )\ ----- ^^-^^ "In theory, theory and practice are the same, but in practice, theory and practice are different." On 7/28/09 7:34 PM, "Yoon-suk Cho" <isem...@gmail.com> wrote: > On Sat, Jul 25, 2009 at 7:30 AM, O'Brien, Dennis > L<dennis.l.o'br...@bankofamerica.com> wrote: >> Sunny, >> >> If you really have two guests up at the same time, using the same DASD, I >> can¹t believe that one or both of them haven¹t crashed. >> >> >> >> We have the same guests defined on two z/VM systems. We use the XLINK >> feature of CSE to make sure that only one of them can get the DASD >> read/write. If the second one is accidentally logged on, some code in >> PROFILE EXEC will discover that the DASD is read-only, message the operator, >> and log off. >> > > I really looking for the manual to setup linux system on two z/VM. > Could you give me the detail manual ? > > >> >> >> >> Dennis O¹Brien >> >> >> >> "That's one small step for (a) man, one giant leap for mankind". -- Neil >> Armstrong, 20 July 1969, Sea of Tranquility >> >> >> >> >> >> From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On >> Behalf Of sunny...@wcb.ab.ca >> Sent: Friday, July 24, 2009 15:20 >> To: IBMVM@LISTSERV.UARK.EDU >> Subject: [IBMVM] Is it bad to make one zlinux running on 2 z/vm? >> >> >> >> We sometimes accidently turn on one linux guest on two z/VM systems. >> Both z/VM system has their own DIRMAINT and RACF. No RSCS. >> We add the same guest direct file to two z/VM so it makes the flexibility to >> boot. >> >> Is it bad to make one zlinux running on 2 z/vm? >> So far we didn't get any complaint. But I can't expain myself how. It has >> same ip address and the same dasds. >> >> sunny >> > > >> ________________________________ >> >> This message is intended only for the addressee. It may contain privileged >> or confidential information. Any unauthorized disclosure is strictly >> prohibited. If you have received this message in error, please notify us >> immediately so that we may correct our internal records. Please then delete >> the original email. Thank you. (Sent by Webgate1)
