Charles Mills wrote: VSAM replaced ISAM -- how come PDSE has never gotten "good enough" to replace PDS?
and this example is a little unfortunate. I wish it were not the case, but ISAM and BDAM remain in significant, not at all marginal use in a number of very large z/OS shops. For now at least PDSEs cannot replace PDSs for certain system libraries, for reasons that have been canvassed here over and over again. More generally, the technical adequacy, even the radical technical superiority, of the new do not usually provide a sufficient impetus for the replacement of old technology , however inadequate, in mainframe shops. Inertia and sloth often ensure the survival of these old technologies long after their expiration dates. Worse, technical imperatives must usually give place to crackpot-realist 'business cases': Don't change it and incur the vast expense of doing so using handicrtaft methods when it ain't broke. John Gilmore, Ashland, MA 01721 - USA ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
