"Mark Zelden" <m...@mzelden.com> wrote in message news:<1732118085814428.wa.markmzelden....@bama.ua.edu>... > On Mon, 30 Jan 2012 11:39:20 +0100, Vernooij, CP - SPLXM <kees.verno...@klm.com> wrote: > > > > > >To be precise: ASM reserves 2 exposures *per pagedataset* not per > >volume (i.e. 2n-1 Aliasses per volume), since/so you can allocate more > >than 1 pagedataset on one volume. We do so to fill 3390-9s and -27s with > >pagedatasets. > > > > You've been able to allocate a page ds larger than 4G for quite some time > now (since z/OS 1.8 + OA20749). On our largest systems, we allocate a
> single local page dataset per 3390-27 volume. > > In one of the environments I support I couldn't turn on WLMPAV because > much of DASD was shared between 2 sysplexes (via MIM) and that would > have led to "PAV thrashing", so I never allocated more than one per > volume anyway (except common/plpa). We did have static PAVs for > that environment, but ASM ignored that and only reserved the pavs > when WLMPAV was set. So it was nice when HIPERPAV came along for > that environment. > > Mark > -- Yes, I know of the large pagedatasets. However, since we don't have Hiperpav, we decided to stick with the 4 GB datasets on a 3390-27 so ASM could reserve 6x2 exposures to the 27GB pagedatasets, i.s.o. 2 exposures to the single 27GB pagedataset. 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 lists...@bama.ua.edu with the message: INFO IBM-MAIN
