Greg, Thanks for the info. To sum up: I can safely move all my current 3390-03 pageds to 3390-09's on ESS with dynamic (WLM managed) PAV's, two 3 GB pageds belonging to the same system on each volume, ensure sure they are not used over 30%. Right?
One question about the 30%: in the 3380 era, when a pageds was 625MB, keeping utilization under 30% ensured 425MB free space, apparently enough for the contiguous slot algorithm. In a 4 GB pageds, 30% utilization leaves 2.8GB free for contiguous slots. Does this imply that the size of contiguous slots has increased? Kees. "Greg Dyck" <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>... > The following ROT are still reasonable- > > - Individual local page datasets should not exceed 30% (or 25% if you > choose) utilization because the contigious slot allocation algorithm becomes > inefficient/unsuccessful for that dataset. The utilization% at a total > paging subsystem level is irrelevent with respect to the algorithms. > > - All local page datasets should be the same size (or close to it in slots) > and device type because of ASMs round robin allocation algorithm. If one > page dataset has 12000 slots and another has 24000 the utilization% on the > second will be about 1/2 of the first. > > - Paging bandwidth is as important as paging space. Converting 9 page > datasets to 3 page datasets of triple size will probably impact performance. > More smaller page datasets is always better over fewer large page datasets. > > - A volume should only have a single local page dataset on it, and no other > datasets. Use of WLM managed PAVs by ASM can be used to eliminate this > restriction. Depending on the actual storage subsystem backing a page > dataset it may or may not be reasonable to have multiple systems using a > volume with a page dataset on it. > > Greg > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO > Search the archives at http://bama.ua.edu/archives/ibm-main.html ********************************************************************** For information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. ********************************************************************** ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
