On 22 May 2017 at 12:57, Paul Gilmartin < 0000000433f07816-dmarc-requ...@listserv.ua.edu> wrote:
> > ... In any case, a SAF product has to be available extremely early in > IPL, ... > > > How does ACF2, based on VSAM, meet this requirement of early availability? > The same way it would if ACF2 used BDAM or QSAM or... VSAM is not like VTAM or TCP/IP or z/OS UNIX filesystems. There is no "VSAM address space" to be initialized at some point in the IPL.* VSAM is almost entirely a collection of subroutines, just like the older access methods. * These days there are all sorts of "helper" address spaces around - VLF, LLA, CATALOG, ... and I suppose one of those may need to be active in order to allocate and open a VSAM dataset. But just to do the I/O, I don't think so. Tony H. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
