ursday, February 22, 2018 4:25 PM
To: IBM-MAIN@listserv.ua.edu
Subject: Re: Count with no Data and no Key ? (CKD internals again)
On Thu, 22 Feb 2018 15:55:49 +, Seymour J Metz wrote:
>I seriously doubt that; it would generate a Unit Exception trying to read the
>second record of the
metz3
From: IBM Mainframe Discussion List on behalf of
Christopher Y. Blaicher
Sent: Friday, February 23, 2018 9:49 AM
To: IBM-MAIN@listserv.ua.edu
Subject: Re: Count with no Data and no Key ? (CKD internals again)
Radoslaw,
The access methods detect the
List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf
Of Paul Gilmartin
Sent: Friday, February 23, 2018 7:12 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: (External):Re: Count with no Data and no Key ? (CKD internals again)
On Fri, 23 Feb 2018 14:49:05 +, Christopher Y. Blaicher
wrote:
>
>The acc
On Fri, 23 Feb 2018 14:49:05 +, Christopher Y. Blaicher
wrote:
>
>The access methods detect the key=0, count=0 records and process them as EOF,
>which is how they signify the end of a PDS member. Every member has an EOF
>record with the rare exception of a member that ends at the end of th
ist [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf
Of R.S.
Sent: Friday, February 23, 2018 8:35 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Count with no Data and no Key ? (CKD internals again)
I don't know internals, but definitely one can use short blocks on DASD, 18B is
not a limit. You ca
I don't know internals, but definitely one can use short blocks on DASD,
18B is not a limit. You can use 18 or 5 if you want. Of course the
tracks utilization will be extremely poor, but that's different story.
BTW: I'mt not sure, but it seems the null record inside a member is when
the member
Paul Gilmartin wrote:
>Also, just curious, I understand that on tape a block <18 (? still?) is
>bypassed as a noise record.
Wow! Interesting! Where is that documented?
>But it's possible that with RECFM=VB the last block might, by happenstance,
>consist of as few as 8 bytes (BDW=8; RDW=4).
On Thu, 22 Feb 2018 15:55:49 +, Seymour J Metz wrote:
>I seriously doubt that; it would generate a Unit Exception trying to read the
>second record of the member. You're clearly misinterpreting something.
>
>There is a EOF after the directory and an EOF after each member. There is no
>EOF i
http://mason.gmu.edu/~smetz3
From: IBM Mainframe Discussion List on behalf of
R.S.
Sent: Thursday, February 22, 2018 10:51 AM
To: IBM-MAIN@listserv.ua.edu
Subject: Re: Count with no Data and no Key ? (CKD internals again)
I just found that in PDS every (?)
From: IBM Mainframe Discussion List on behalf of
Christopher Y. Blaicher
Sent: Thursday, February 22, 2018 8:32 AM
To: IBM-MAIN@listserv.ua.edu
Subject: Re: Count with no Data and no Key ? (CKD internals again)
You can have a zero length key and data, it is called an End Of
@listserv.ua.edu
Subject: Re: Count with no Data and no Key ? (CKD internals again)
You can have a zero length key and data, it is called an End Of File (EOF)
marker.
Chris Blaicher
Technical Architect
Mainframe Development
P: 201-930-8234 | M: 512-627-3803
E: cblaic...@syncsort.com
Syncsort
quality leader Trillium Software is now a part of Syncsort.
-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf
Of R.S.
Sent: Thursday, February 22, 2018 8:17 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Count with no Data and no Key ? (CKD
Is it allowed in CKD to have Count only in a physical record?
I mean Count field with zero-length Data (and zero-length Key).
--
Radoslaw Skorupka
Lodz, Poland
==
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