On 28/2/23 13:55, Gibney, Dave wrote:
LIKE=a good representative existing library.
How about: Don't bother kid, use the z/OS UNIX file system instead?
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Subject: Re: zOSMF and zOWE for non-mainframers
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On 28/2/23 13:41, Gibney, Dave wrote:
How many decades have we had System Determined Blocksize, and other
artifacts of SMS. These details are surely not anything than new folks need to
deal with at the outset.
If a young programmer came to you and asked "what is the best DCB for a
C++ source data set?" what would you suggest?
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From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On
Behalf Of David Crayford
Sent: Monday, February 27, 2023 9:27 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: zOSMF and zOWE for non-mainframers
On 27/2/23 06:46, Andrew Rowley wrote:
On 25/02/2023 8:03 am, Bob Bridges wrote:
Oh, I was going to mention that surely allocating datasets, either in
batch or TSO, has got to seem like one of the dumbest and most
incomprehensible things we do on the mainframe, to a foreigner.
Allocating datasets shouldn't be that hard to grasp. "Dataset" is
actually a pretty common term and generally implies a collection of
data with more structure than just a file.
From what I've seen while working with younger individuals, they tend
to find the MVS file system quite perplexing. In order to navigate it,
one must first grasp the archaic concept of CKD disk geometry, including
blocks, cylinders, blocking factors, and record formats, among other
things. And that's all before even introducing them to the intricacies
of VTOCs, catalogs, interblock gaps, spanned record formats etc.
If people have worked with databases, presumably they have
encountered
the concept of defining the schema.
A dataset is simply a collections of records (similar to a database
table) where each record has a fixed length or limited variable length
and the total collection has a size limit. Any structure within the
records is up to the application. This is not an unusual construct.
What is unusual is that z/OS uses such a structured format for almost
everything, not that it exists.
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