A Lot of z/OS infrastructure these days uses Unix System Services. Further, some of those services are pretty tightly interwoven with classical MVS component, so "rides" is a bit much. As for Linux, until recently it did not run under z/OS at all.
POSIX? These days there is a Single UNIX Specification from The Open Group, endorsed by and with participation of both IEEE (POSIX) and ISO. -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List [[email protected]] on behalf of Steve Smith [[email protected]] Sent: Monday, April 13, 2020 12:14 PM To: [email protected] Subject: Re: Any shop use UNIX in a production job? I'll dispute that. MVS manages hardware, dispatching, memory, DASD* and I/O. USS "rides" on the back of those. I grant that USS is Unix (and Posix), but it's practically a virtual machine on top of MVS. Contrast with z/Linux. sas *... i.e. it's closer to the hardware anyway. USS filesystems use MVS datasets for containers. On Mon, Apr 13, 2020 at 11:17 AM Charles Mills <[email protected]> wrote: > Actually, I considered asserting that there is no such thing as running on > z/OS NOT under UNIX. <g> > > I believe that "z/OS is UNIX" is a true statement. > > Most of us in this group think of z/OS as a bunch of traditional stuff > with USS glued on top. From the Open Group's legal point of view, z/OS is > UNIX with some extra, proprietary stuff thrown in (as is Windows Server). > > USS is not something you "run under." USS is a set of interfaces into > various z/OS services. As is JCL. As is LE. As is TSO. > > Charles ---------------------------------------------------------------------- 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
