On Thu, 11 Dec 2008 09:36:20 -0800, Edward Jaffe <edja...@phoenixsoftware.com> wrote:
>Chase, John wrote: >> I wonder how many installations have DASD farms that big, let alone enough DASD to define that much page space. :-D >> > >Even if you could define it, which you can't, MVS would not be able to >use it. The maximum size of an individual page data set is 65,520 >cylinders or just under 45GB. The max total AUX size for MVS is 8TB! (No >smiley this time.) > >-- >Edward E Jaffe Now I find this very interesting. I know it is not valid to compare architectures, but the iSeries has some interesting things about it. The first is that it has "single level storage". Everything on the system resides in virtual storage (64 bit currently). This means everything. I.e. the entire disk system can be thought of as just virtual storage. The largest i right now is the 595. It maxes out at 2TB of physical RAM, 381TB of DASD and is 64 way. An impressive machine. I realize the above is an apples vs bricks comparison. But I never realized that z/OS was limited to 8TB of virtual for the entire system. Of course, data files do not come out of that 8TB. And if a company really needs that, then they'd just go parallel sysplex. -- John ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
