On Tue, Aug 16, 2016 at 12:12 PM, Jesse 1 Robinson <jesse1.robin...@sce.com> wrote:
> I think that the problem with writing to *any* data set on whatever medium > is that it cannot be read while it's open for output. It seems that the log > file must be written to sysout (for concurrent examination) and then > captured to a data set after it's closed. > > If, by "data set", you mean a normal z/OS DSN=, that is true. But if you write to a z/OS UNIX file (PATH=), it is not. A UNIX file can be read by a separate process while is it still open & being written to. I guess this is because the physical I/O to the UNIX file is actually done by the z/OS UNIX kernel address space, or a filesystem colony address space. So the data producer and consumer are really sending requests to the UNIX subsystem, much like SPOOL I/O. -- Klein bottle for rent -- inquire within. Maranatha! <>< John McKown ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
