"Back in the day..." meaning along about VM/HPO 4.2-ish, I had a local mod that allowed me to temporarily freeze a virtual machine in place by marking it as non-dispatchable. Once it dropped from queue, it would just sit there until it was un-frozen and allowed to resume work. At that same point in time, VMSAVE would sort of do the same thing as hibernate - except it was prone to weirdness from things like having pending hardware interrupts cleared when you resumed a virtual machine.
I don't hack CP so much these days, so I'm not sure what would be required - or if current architecture would even allow - similar chicanery these days. But *cough*Endicott*cough* it sure would be a handy feature to have as part of the OS... -dan. Marcy Cortes wrote:
Some sort of suspend would be cool - imagine hibernating all your guests, doing your VM and/or HW maintenance, and having them just pop back up! Kind of like hibernate on the PC! But, it doesn't really exist. You'll either have to look at some backup from inside of the guest or if you really need to be 24/7, then you have to have redundancy in virtual servers - preferably not on the same HW and perhaps even not in the same data center location. Marcy Cortes "This message may contain confidential and/or privileged information. If you are not the addressee or authorized to receive this for the addressee, you must not use, copy, disclose, or take any action based on this message or any information herein. If you have received this message in error, please advise the sender immediately by reply e-mail and delete this message. Thank you for your cooperation." -----Original Message----- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Tyler Koyl Sent: Wednesday, April 05, 2006 10:42 AM To: [email protected] Subject: [LINUX-390] Freeze Linux Guests momentarily I am quite sure this exists but I need a little help. I was wondering if there is a way to place a z/VM 5.1 linux guest into a froozen state? My thinking is just place the guest into a CP Read State. Can't seem to find the command to send a guest a request to enter CP READ. I am writing a REXX exec to handle the snapping. The logic I am looking for is this: /* Backup guest x - Place a guest is CP READ state (Or something similar) - Snap Guest related DASD (SVAA Snapshot) - Release Guest Repeat for each guest to be snapped. */ It has been mandated that the guests will be 24/7 so they cannot be logged off to do the backup, nor can the portal services etc be turned off. I am worried about sequential snapping DASD that belong to an LVM group so this is why I am looking for a work around. Any help is appreciated. Tyler Koyl Saskatchewan Wheat Pool Regina, Saskatchewan, Canada This e-mail and any attachment(s) are confidential and may be privileged. If you are not the intended recipient please notify me immediately by return e-mail, delete this e-mail and do not copy, use or disclose it. ---------------------------------------------------------------------- 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 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
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