are you able to move stuff off existing mod 9 over to the 27s and free some up?
Marcy "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." ________________________________ From: The IBM z/VM Operating System [mailto:[email protected]] On Behalf Of Mark Wheeler Sent: Tuesday, February 23, 2010 9:01 AM To: [email protected] Subject: Re: [IBMVM] Adding different sized page volumes Yes, we're paging. A lot! And the page volumes are filling up too! Some new 3390-27 page volumes have been added, with all 32K cyls allocated to PAGE, and when the 3390-9's fill up, the mod27's do go beyond the 10016 cyl mark. I suspect (we haven't gotten this far yet) that when the mod 9's completely fill up, not only will block paging suffer (more), but most of the page-outs will be concentrated on the relatively few mod 27s. Gaackkk! I'm just trying to reconcile the admonishment not to mix page volume sizes with what people do in the real world. Since my options don't provide for the *ideal* solution, my preference is to adopt one that will provide the maximum benefit with the smallest downside. Best regards, Mark ________________________________ Date: Tue, 23 Feb 2010 08:37:06 -0800 From: [email protected] Subject: Re: Adding different sized page volumes To: [email protected] My experience was that the paging will be spread evenly until the -9s start filling up and then the additional space in the -27s will be used. That was from a recent experience with a combination of -3s and -9s. I have since converted everything to -9s. The only possible answer to the other question is, "It depends." If your system is not paging to DASD very much, it probably doesn't matter. If you are paging to DASD, then the lower the space utilization, the more likely that the system can realize the benefits of block paging. Regards, Richard Schuh ________________________________ From: The IBM z/VM Operating System [mailto:[email protected]] On Behalf Of Mark Wheeler Sent: Tuesday, February 23, 2010 7:01 AM To: [email protected] Subject: Adding different sized page volumes Greetings all, We need to add more page volumes (for both space and actuators) but are fresh out of 3390-9's. If we throw 3390-27's into the mix, should they be fully allocated as PAGE, or just cyls 1-10016? Will I start a religous war if I also ask about the latest recommendation for page volume space utilization? Max of 25%? 50%? "It Depends"? Best regards, Mark Wheeler UnitedHealth Group ________________________________ Your E-mail and More On-the-Go. Get Windows Live Hotmail Free. Sign up now. <http://clk.atdmt.com/GBL/go/201469229/direct/01/> ________________________________ Hotmail: Free, trusted and rich email service. Get it now. <http://clk.atdmt.com/GBL/go/201469228/direct/01/>
