Thanks! You answered my questions. I always figured there was a time
before catalogs, when I assume you had to code VOL=SER= on everything,
but that was before my time. And I was trying to remember the CVOL
method. I started with ICFCAT's but come to think of it, there may have
been one or
VSAM catalog was released in 1974 in OS/VS2 R2, prior to that the catalog
was CVOL (dsname SYSCTLG with BLKSIZE=256 and KEYLEN=8). The SYSRES volume
was the primary SYSCTLG but could be linked to CVOL on other volumes. The
"new" VSAM catalog in 1974 was a big improvement.
On Fri, May 24, 2024
VTOCs did come first. The original DOS/360 Operating System did not
have catalogs. VTOCs contain not only information about physical
location and organization of datasets on the volume but also (for OS/360
and its MVS and z/OS descendants) contains a list of all the free
extents on the
All speculation on my part. One system with no DASD, you need neither.
On a system with only one, of just a few DASD volumes, a VTOC is required to
say where on the volume a dataset is and the basic attributes of PS and PDS
datasets.
Once you get to several always mounted DASSD volumes, it
For the most part the catalog lets you locate your dataset no matter
which volume you put it on.
For non-vsam, that is about all that is stored, dataset
characteristics are in the VTOC.
And with non-SMS volumes you can have uncataloged datasets on DASD or tape.
VSAM came from the Future Systems
Stack segment owning the next-available-byte (NAB) could not be found or a
DSA backchain pointer did not contain a valid 31-bit addressable address.
Possible reason is storage overlay or wrong addressing mode. DSA backchain
pointers must contain valid addresses that can be accessed as is while in
I'm curious whether any of you old-timers can explain why we have both VTOCs
and catalogs. I'm guessing it comes down to (a) VTOCs
came first and catalogs were added to solve some problem (what?) and/or (b)
catalogs were added to save some I/O and/or memory, back
when a bit of those mattered.
The latest from IBM:
"Hello Len,
The DGASACMP program will not accept QPL_FLAG_GZIP_MODE.
In our documentation (
https://www.ibm.com/docs/en/connect-direct/6.2.0?topic=dgasacmp-parameters ) we
specify what parameters that can be passed to the DGASACMP program. I did a
Google search on
Len:
Even if they are not Mainframe based, they should have the
"utility" for their system if they are running Connect:Direct for
that system. Otherwise, they are going to fail the hand-shake for
the XFER protocols used by C:D, unless the new owners have made
other changes to have C:D use
Tony:
Most, if not all, of our customers are not mainframe based.
Thank You and Please Be Safe.
Please Note: I would appreciate it if you would please include my teammates
("rdc_applications_...@gdit.com") in future emails to keep them informed.
Len Sasso
Systems Administrator Senior
CSRA,
Hi Len ,
Check with IBM on your open Case, but I suspect that GZIP is NOT
compatibleYour remote client should already have a copy of
DGASACMP.. Why not just use that..???
Thanks
Tony
-Original Message-
From: IBM Mainframe Discussion List
Good afternoon, Tony!
I found the manual and opened Case TS016307677 - Connect:Direct - DGASACMP
Program Parameters: Can this program accept a parameter (QPL_FLAG_GZIP_MODE
flag) to add GZIP header and trailer information to the output stream (when
performing compression)?
If this is
Len,
Check out the following manual; IBM Connect:Direct for z/OSVersion
6.1.
On page 653 is an example of the Batch Compression utility (DGASACMP).
You can run this and then transfer the file
Good Luck
Tony
-Original
Thank you Paul for your suggestion.
I used the following:
Usscmd = ‘nestat -t -M LONG’
call bpxwunix usscmd,,out.,stde.
I got the output that I wanted and not written to syslog.
On Tue, May 21, 2024 at 4:03 PM Paul Feller <
05aa34d46684-dmarc-requ...@listserv.ua.edu> wrote:
> There is
Good morning, Steve!
Could you please provide an example of running compression in a run task and
then sending the resulting file to the target system?
Or point me to a manual that provides an example?
Thank You and Please Be Safe.
Len Sasso
Systems Administrator Senior
CSRA, A General
PTF was already applied. Module at UI83147.
Looked at save area pointed to by TCAREGPT and it looks fine.
What precisely is LE complaining about?
On Thu, 23 May 2024 06:56:34 +1000 Attila Fogarasi
<05b6fee9abb7-dmarc-requ...@listserv.ua.edu> wrote:
:>Sounds like you don't have PH24895
All major relational databases support variable length data load (incl.
DB2) . This is not a problem at all.
ITschak Mugzach
*|** IronSphere Platform* *|* *Information Security Continuous Monitoring
for z/OS, x/Linux & IBM I **| z/VM coming soon *
On Wed, May 22, 2024 at 11:41 PM Tom Ross
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