It does not matter where you issue V XCF,OFF in a sysplex. The result is the same. As far as choosing an 'active system', you cannot issue a command on an inactive system, so I take the question to mean 'some other system', which is not at all required. Any system (still) active in a sysplex can process V XCF,OFF for any member, including itself.
The virtue of issuing V XCF,OFF is that in a parallel sysplex, a system can be detected by others as down via CF coupling links. That's why you don't have to 'Reply down' on another system. XCF knows that the system has been shut down. No 'down' reply is necessary. We also have a three-member 'basic sysplex' with no CF. Members share couple data sets and communicate via CTC. Without CF links, other systems have no I/O-independent means of checking status, so we have to reply 'down' for each system being shut down except the last. In any configuration, if the last system shut down is the first system brought back up, IPL goes smoothly. If systems are IPLed such that the last one down is *not* the first one up, you will get an additional WTOR to verify that no other system is active in the plex. The reason is that the last one down had no other system available to erase it from XCF, so its status is indeterminate until you reply. . . J.O.Skip Robinson Southern California Edison Company Electric Dragon Team Paddler SHARE MVS Program Co-Manager 626-302-7535 Office 323-715-0595 Mobile [email protected] From: Mark Zelden <[email protected]> To: [email protected], Date: 06/13/2014 01:37 PM Subject: Re: V xcf clarification Sent by: IBM Mainframe Discussion List <[email protected]> On Fri, 13 Jun 2014 20:23:15 +0000, Staller, Allan <[email protected]> wrote: >I you look a little further into the process, there is a later reply "reply down > when system has been reset" (or something similar). >IF the LPAR that issued the VARY XCF, is in fact the one that has been reset, >you would have to find another console to actually reply 'DOWN" from. > >Other than that, I do not believe it will make any difference in the end. You can VERY XCF,sysname,OFFLINE from the system you are taking out of the sysplex and not get those annoying messages if you put an SFM policy in place. -- Mark Zelden - Zelden Consulting Services - z/OS, OS/390 and MVS ITIL v3 Foundation Certified mailto:[email protected] Mark's MVS Utilities: http://www.mzelden.com/mvsutil.html Systems Programming expert at http://search390.techtarget.com/ateExperts/ ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
