Others have offered good reasons for V XCF,OFF rather than just RESETting an LPAR. Here's another. With a minimal amount of configuration, you can enable 'reIPL' to act on this command:
V XCF,sysname,OFF,REIPL ReIPL is immediate and can only use the current sysres volume. That's not always what you want. You may need intervening time to perform some activity. or you may want to change sysres volumes. If reIPL fills the bill, you can IPL a system with no delay entirely via console command. No HMC necessary. This is important to us for sandbox systems where reIPL can be accomplished entirely by folks who don't have HMC access. . . JO.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: Tom Ambros <[email protected]> To: [email protected], Date: 01/20/2014 05:18 AM Subject: Re: Impact of XCF offline Sent by: IBM Mainframe Discussion List <[email protected]> You don't have another working console in the sysplex? If you don't vary the offending system out of the sysplex when it behaves as you describe it'll be a while (failure interval) before serialized resources are freed up and any new serialization takes place, if I remember correctly. If you don't have the luxury of a sysplex that is all non-production you run the risk of affecting your production workload. We went to the trouble of implementing the BCPii interface to handle a system that can't be partitioned because it is unreachable by any other means just for this situation. I forget precisely what they called it, the first iteration was a function in System Automation. It was a while back we did it. Thomas Ambros Operating Systems and Connectivity Engineering 518-436-6433 From: "van der Grijn, Bart (B)" <[email protected]> To: [email protected] Date: 01/20/2014 07:59 Subject: Re: Impact of XCF offline Sent by: IBM Mainframe Discussion List <[email protected]> Peter, We used to IPL our systems without the V XCF,<sysname>,OFFLINE. That worked for years until we started to run into issues with signaling structures (one of the systems would occasionally not use one of the signaling structures after an IPL). We opened a PMR and IBM's response was to perform the V XCF as per < http://www-03.ibm.com/systems/z/advantages/pso/removing.html>. We changed our IPL procedure and haven't seen the problem since. (This was back in z/OS 1.10) So yes, we did see an impact with not using the V XCF OFFLINE. Bart -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of mf db Sent: Sunday, January 19, 2014 9:05 AM To: [email protected] Subject: Impact of XCF offline Hello All, This question might sound little basic and dummy, but my apologies first. There are some situation in our shop when one of our Development LPAR do undergo to unresponsive state(This happens when our developers do some destructive testings or many other factors) and even we cannot issue any commands on Console. To resolve this we just do a de-activate and activate to re-ipl the system. As a normal IPL procedure we issue V XCF,OFF,SYSNAME=something. Will there be any impact to the system when we do not issue the V XCF,OFFLINE and just do a de-activate and activate ? Peter ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
