Thanks; II I hadn't seen that usage before. The context that I'm interested in is tightly coupled multiprocessor systems, where a CPU used Direct Control (S/360) or SIGP (S/370 through Z) to cause another CPU to look for work. Originally that was used both for dispatch queues and I/O queues, but starting with XA it was no longer needed for I/O.
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List [[email protected]] on behalf of Steve Horein [[email protected]] Sent: Wednesday, December 30, 2020 11:26 AM To: [email protected] Subject: Re: Online reference for term shoulder tap Not the best, but the closest I could find: https://www.ibm.com/support/knowledgecenter/SSLTBW_2.4.0/com.ibm.zos.v2r4.ieag400/iea3g447.htm Your installation chooses the number of systems that must see the RSA-message before a system sends a *“shoulder-tap”, an acknowledgement that it has received the RSA-message*, to the originating system. Assuming that the number of systems is two, the next system in the ring sends the shoulder-tap to the originating system. On Wed, Dec 30, 2020 at 9:59 AM Seymour J Metz <[email protected]> wrote: > Is there a manual available online that defines the term shoulder tap? I'm > looking for something that I can cite in a wikipedia article. Thanks. > > > > -- > Shmuel (Seymour J.) Metz > http://mason.gmu.edu/~smetz3 > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
