The last time we have IPL'ed either of our VM systems was due to a air conditioner failure (thermal shutdown of the z/890 box) 590 days ago.
The only problem we had was with the zLinux side starting up. We got the messages: /dev/system/home has gone 1537 days without being checked, check forced. /dev/dasda1 has gone 931 days without being checked, check forced. /dev/dasda1 has gone 1075 days without being checked, check forced. Since check disk was being run, and the time they run varies by disk size (or disk used, or number of files or....) the guests came up out of order. To fix it, we did the dumbest (ok easiest...requires no thinking) thing to do.... Wait for all 27 images to come up and go idle. Issue the shutdown script. IPL z/VM again and let AUTOLOG bring up all guests in the proper order. So, for some of us, the only time we need to IPL VM, is for a box swap, LPAR reconfiguration (add memory), maintenance to CP or installation of a new CP. It will be interesting to here what others had issues with. Tom Duerbusch THD Consulting On Wed, May 27, 2015 at 9:33 AM, Will, Chris <[email protected]> wrote: > We have gotten in the habit of IPLing our z/VM and zLinux guests every > Sunday during our standalone window. With the window shrinking and the > need for 24/7 availability is it really necessary to IPL every week? If > not what potential problems could we run into by not doing the IPL (memory > leaks, logs filling etc.). This is in comparison to the Intel side of the > shop (Red Hat, Windows) where they go months between IPLs. The only > benefit I see is the opportunity to recycle WMB execution groups. > > Chris Will > > > > The information contained in this communication is highly confidential and > is intended solely for the use of the individual(s) to whom this > communication is directed. If you are not the intended recipient, you are > hereby notified that any viewing, copying, disclosure or distribution of > this information is prohibited. Please notify the sender, by electronic > mail or telephone, of any unintended receipt and delete the original > message without making any copies. > > Blue Cross Blue Shield of Michigan and Blue Care Network of Michigan are > nonprofit corporations and independent licensees of the Blue Cross and Blue > Shield Association. > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO LINUX-390 or > visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > ---------------------------------------------------------------------- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ > -- ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
