"Terri E Shaffer" <[email protected]> wrote in message news:<fc9f7dcfec3d424cac2eb55114f0afa31b2e7d9...@emarc03vs01.exchad.jpmc hase.net>... > We currently have 3- 3330cyl page datasets defined per 3390-9 volumes with PAV support turned on. My question revolves around the above support and might be more of a personal opinion than technical one.... So is it better performance to allocate 1 per volume, 3 per volume per 3390-9 and/or what if I go for a full Mod-27 or even mod-54, given either 1 or multiple per physical volumes??? Is anyone doing this currently since the APAR closed last year? Have you seen any performance hits/ benefits.. etc?? > > Since my history dates what I was always taught and given controllers/cache/pav's etc, what are others seeing? > > > Thanks > > Ms. Terri E. Shaffer
One consideration I can thing of is PAV. ASM ensures 2 exposures for each pagedataset. As far as I know, nothing has changed there, so with full mod-27's or -54's you still have 2 exposures on a much large pagedataset and much more ASM slots. I don't know how hyperpav solves this on hyperpav capable devices, but on ESS, you might want to use smaller pagedatasets to have enough exposures over your ASM slots. Kees. ********************************************************************** 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. Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch Airlines) is registered in Amstelveen, The Netherlands, with registered number 33014286 ********************************************************************** ---------------------------------------------------------------------- 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
