Jim, Thanks for the response. I guess BLSR is not a good comparison since it has its own way of intercepting the I/O [not by replacing ACBINRTN], so the question remains. Hopefully, I'll test this out in a week or so.
Meanwhile, I am confirming that DYNALLOC during SSI Open does indeed hang on SYSZTIOT, so I am deferring it up to the first I/O request. Luckily, there are no collisions between the SSI Close and dynamic De-Allocation. -Victor- -----Original Message----- Date: Wed, 17 May 2006 02:52:14 -0400 From: Jim Mulder <[EMAIL PROTECTED]> Subject: Re: SUBSYS and VSAM IBM Mainframe Discussion List <IBM-MAIN@BAMA.UA.EDU> wrote on 05/04/2006 03:32:36 PM: > According to an old doc [SSI in MVS/SP], when a user opens a DCB against a > SUBSYS dd, SAM-SI [part of the SAM access] converts it into an ACB [which > is presented to the SSI routines] and then maps the response back to the > original DCB. > > Anybody knows what happens if the user opens a VSAM ACB against a SUBSYS dd > [like when using BLSR]? The BLSR SSI Open routine is presented with a key 5 copy of the ACB being opened. I don't know what gets mapped back into the original ACB, because BLSR doesn't modify the key 5 copy, and doesn't depend on anything getting getting mapped back. My knowledge of SUBSYS processing is limited to what BLSR does. Jim Mulder z/OS System Test IBM Corp. Poughkeepsie, NY _ This message and any attachments are intended only for the use of the addressee and may contain information that is privileged and confidential. If the reader of the message is not the intended recipient or an authorized representative of the intended recipient, you are hereby notified that any dissemination of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail and delete the message and any attachments from your system. ---------------------------------------------------------------------- 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
