On Wed, 23 May 2007 00:00:52 -0400, Robert A. Rosenberg <[EMAIL PROTECTED]> wrote:
>Can you PLEASE explain why there was/is support for a SHR->EXC >Upgrade... No, I cannot. The original support predates the library system that we used before the one we are using now (the archaeological digs go down to the MVS V1 strata), implying that the code was written before I finished high school. Best guess is, "because someone needed it." There are plenty of uses of ENQ beyond the serialization of datasets (SYSDSN). I am aware of a number of RET=CHNG uses within the BCP. >Since as I noted, the Support is easy to add (as I documented) Unfortunately, "because it's easy" is not considered a compelling business case at IBM. >there is no downlevel exposure if it is initially restricted to use >by the Initiator No, you would also have to ensure that the downgrade support is understood by _all_ systems in a GRS ring, GRS Star and MII complex. Otherwise an uplevel system may create havoc by implying a grant of another system's request when that system doesn't understand that a downgrade is possible. This exposure implies that 'compatibility PTFs' would be required for all in-service releases of GRS and MII. Scott Fagen z/OS Core Technology Design IBM Poughkeepsie ---------------------------------------------------------------------- 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
