No z/OS vols here. They aren't even on that same box anymore let alone genned for VM lpars to get at them. Good security practice I believe ;) So there's not anything I can offline that isn't already. We could lump various VM systems together, but then the performance guys will get mad about the I/O patterns not being spread across all the LCUs that are defined.
I guess we'll up it. We've got a PMR open for support advice as well. Marcy -----Original Message----- From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Alan Altmark Sent: Friday, June 24, 2011 12:23 PM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: [IBMVM] Question on SHUTDOWNTIME On Thursday, 06/23/2011 at 07:06 EDT, Marcy Cortes <marcy.d.cor...@wellsfargo.com> wrote: > The default is 30 seconds (Q SHUTDOWNTIME) for the CP's portion of the shutdown > process. > I recall hearing that is good default. > > We are seeing systems exceed that - 33 seconds in this one that seemed to come > with bonus messages (that is our SW seemed to capture the HCPWRP963I's on this > one). > > > Are others seeing that? In my experience IPL and SHUTDOWN times are directly related to the number of devices. Any device you don't use should be kept in OFFLINE_AT_IPL. That will drastically improve startup/shutdown. On one system, I went from 44 seconds to about 12 by simply getting rid of those pesky shouldn't-be-in-the-I/O-configuration-anyway MVS volumes. Alan Altmark Senior Managing z/VM and Linux Consultant IBM System Lab Services and Training ibm.com/systems/services/labservices office: 607.429.3323 mobile; 607.321.7556 alan_altm...@us.ibm.com IBM Endicott
