In <[email protected]>, on
11/08/2013
at 10:49 AM, Jon Perryman <[email protected]> said:
>I admit I don't re-read JCL and I mostly use existing JCL. But that
>doesn't make my statement false. For LRECL, it clearly states "LRECL
>applies to data sets with the BPAM, BSAM, EXCP, QISAM, QSAM, and TCAM
>access methods, and with SMS, to VSAM data sets.". Just because UNIX
>files are implemented thru one of these, doesn't mean UNIX files are
>that access method.
Then why does z/OS DFSMS Macro Instructions for Data Sets describe
considertationa for using BSAM and QSAM with Unix files? Why does z/OS
DFSMS Using Data Sets include this?
1.1.2.9 Access to z/OS UNIX Files
Programs can access the information in UNIX files through z/OS
UNIX System Services (z/OS UNIX) calls, such as open(pathname),
read(file descriptor), and write(file descriptor). Programs can
also access the information in UNIX files through the BSAM,
BPAM, QSAM, and VSAM access methods. When you use BSAM or QSAM,
a UNIX file is simulated as a single-volume sequential data
set. When you use VSAM, a UNIX file is simulated as an ESDS.
When you use BPAM, a UNIX directory and its files are simulated
as a partitioned data set directory and its members.
--
Shmuel (Seymour J.) Metz, SysProg and JOAT
ISO position; see <http://patriot.net/~shmuel/resume/brief.html>
We don't care. We don't have to care, we're Congress.
(S877: The Shut up and Eat Your spam act of 2003)
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