We IPL z/VM only when required by the implementation of maintenance or when a POR is needed on the box. We have gone 1.5 years between IPL's on z/VM and didn't have any issues. Linux was also designed to stay up indefinitely. Some of the test servers have been up for over a year with no issues.
The prod servers are shut down and booted weekly only because we do this to obtain a clean backup (to tape) of the dasd volumes (all are ECKD volumes). While the prod servers are down, the mirrors to the 2nd set of volumes is 'broken' and the servers are booted. The mirror for a volume is automatically reestablished when the backup program, FDR, completes successfully. Harley Linker Jr. -----Original Message----- From: Linux on 390 Port [mailto:[email protected]] On Behalf Of Will, Chris Sent: Wednesday, May 27, 2015 9:34 AM To: [email protected] Subject: Are weekly z/VM IPLs necessary? 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/ *************************************************************************** The information contained in this communication is confidential, is intended only for the use of the recipient named above, and may be legally privileged. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please resend this communication to the sender and delete the original message or any copy of it from your computer system. Thank You. **************************************************************************** ---------------------------------------------------------------------- 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/
