Tom, that is incorrect, HSA is allocated in purchased memory. Also 2 GB statement is wrong, it depends on number of devices, number of LPs etc It may range from less than 2 GB to up to 4.5 GB for a fully configured system. There is a HSA Estimator Tool available for this on Resource Link.
Marian Gasparovic IBM Slovakia --- Tom Duerbusch <[EMAIL PROTECTED]> wrote: > From a note many moons ago.... > > The z9 uses a fixed 2 GB for HSA "AND" that 2 GB is > added to the box, over an above what memory you > purchased. > > i.e. your proposed 8 GB box will have 10 GB > installed. > > Tom Duerbusch > THD Consulting > (however, I don't have any thing in writing from an > IBM publication that this is so....but I haven't > really looked either) > > >>> "Peter Webb, Toronto Transit Commission" > <[EMAIL PROTECTED]> 7/20/2007 8:41 AM >>> > We're going for the minimum, which is 8GB. So that > will be 2GB to HSA, > 2GB for expanded store and 4GB for general use. > Still a BIG increase. > > Peter > > -----Original Message----- > From: Linux on 390 Port > [mailto:[EMAIL PROTECTED] On Behalf Of > Feller, Paul > Sent: July 20, 2007 09:24 > To: [email protected] > Subject: Re: Betr.: Re: Dynamic I/O > > Watch how much memory you get on the z9 BC. The > size of the HSA jumps > up a large amount. We just installed a z9 BC as an > external coupling > facility. We set it up for no dynamic IO changes > and the HSA is still > 1728 meg. > > > Paul Feller > AIT Mainframe Technical Support > [EMAIL PROTECTED] > (319)-355-7824 > > > -----Original Message----- > From: Linux on 390 Port > [mailto:[EMAIL PROTECTED] On Behalf Of > Peter Webb, Toronto Transit Commission > Sent: Friday, July 20, 2007 8:06 AM > To: [email protected] > Subject: Re: Betr.: Re: Dynamic I/O > > We are running on a MP2000 with 1 gig of memory. Out > of that 1 gig comes > the HSA plus additional storage CP needs to allocate > dynamic devices. We > have several VSE guests to support plus some CMS > workload. Occasionally > during the day, we have file transfers from VSE to > Windows going through > a 600 MB v-disk. The paging load during the file > transfers just kills > CMS response time. Even taking a bit more main > storage to increase the > HSA for dynamic I/O just isn't a good idea. > > Now, if our plans to purchase a z9 BC go through, > we'll be laughing. > > Peter > > -----Original Message----- > From: Linux on 390 Port > [mailto:[EMAIL PROTECTED] On Behalf Of > Pieter Harder > Sent: July 19, 2007 15:41 > To: [email protected] > Subject: Betr.: Re: Dynamic I/O > > I don't quite get your statement on memory demands. > Dynamic I/O is done > within the Hardware Storage Area (HSA) that is > allocated fixed on > Power-on-Reset after analyzing your IOCDS config. > The dynamic > requirements for issuing dynamic config commands is > probably to small to > measure. (Barton/Rob?) > > Best regards, > Pieter Harder > > [EMAIL PROTECTED] > tel +31-73-6837133 / +31-6-47272537 > > >>> "Peter Webb, Toronto Transit Commission" > <[EMAIL PROTECTED]> > 07/19/07 9:31 >>> > Funny, I was just looking into using dynamic I/O on > our box. See > http://publibz.boulder.ibm.com/epubs/pdf/hcsg1b20.pdf, > Part 2 Using > Dynamic I/O Configuration. > > In our case we won't use it. We are memory > constrained at times, and > don't need the aggravation of performance problems > caused by the extra > memory demands of dynamic I/O. > > Peter > > -----Original Message----- > From: Linux on 390 Port > [mailto:[EMAIL PROTECTED] On Behalf Of > Brad Hinson > Sent: July 19, 2007 14:37 > To: [email protected] > Subject: Dynamic I/O > > I've done a couple of disk changes recently that > require updates to our > IOCDS config, and it's getting hard to schedule a > Power On Reset each > time to recognize the changes. I see a checkmark on > the HMC that > indicates Dynamic I/O is possible if you have the > right pieces in the > config you import. Is anyone using Dynamic I/O, or > can you point me to > some docs (or perhaps another list) on this? > > Also, any docs on the format of the IODEVICE (and > other) statemtents in > this config would also be useful. > > Thanks, > -- > Brad Hinson <[EMAIL PROTECTED]> > Sr. Support Engineer Lead, System z > Red Hat, Inc. > (919) 754-4198 > > ---------------------------------------------------------------------- > 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 > > > > The information transmitted is intended only for the > person or entity to > which it is addressed and may contain confidential > and/or privileged > material. Any review retransmission dissemination > or other use of or > taking of any action in reliance upon this > information by persons or > entities other than the intended recipient or > delegate is strictly > prohibited. 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