On 26 Oct 2010 07:30:50 -0700, in bit.listserv.ibm-main you wrote: >On Tue, 26 Oct 2010 13:14:19 +0000 john gilmore <[email protected]> >wrote: > >:>In his most recent post in this thread Peter Relson speaks of > >:>> . . . massive restructure to allow multiple address spaces before LPA is >built . . . > >:>and I am not dubious. > >:>His argument is, I am sure, a sincere and not a disingenuousd one. It is >nevertheless an argument of the form, 'Scrambled eggs cannot be available on >the breakfast menu; they are available only on the lunch menu; to make them >available at breakfast too would require us to serve breakfast in a different >dining room, change the size of the plates on which we serve breakfasts, bring >the lunch crew in five hours earlier, etc., etc. > >Actually it is more like "People aren't willing to pay more, so why take great >efforts to provide scrambled eggs for breakfast". > >It is nice to sit in an ivory tower and speak of what should be, but there are >also practical considerations. Just because something can be done does not >mean that it worth the effort to do it.
Here it goes back to strategy. The failure to provide a way to transition to an FBA world has probably cost IBM far more than the 26 million it would have cost back when. PDS support may have to be enhanced for certain things because PDSE can't truly supplant the PDS. We have the kludge of the operating system poorly fitting FBA data to CKD architecture only to have that CKD result mapped back to FBA in the controller. IBM has to support two connections to the same set of devices, one for zOS and probably other z and one for everything else. Unfortunately the MVS arena has never felt comfortable with FBA and the failure to have GDG capability and tape compatibility (something available on the RCA Spectra 70) for ESDS data is just another symptom. I remember resenting having to keep a non-SNA local controller just to handle console devices (and 2 of them so that a 3274 failure didn't cripple the system). In the case of PDSE, failure to have it fully available means that we are stuck with PDSs for a very long time. Clark Morris ---------------------------------------------------------------------- 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
