Gerry,
Try a /LOGOFF statement as the last SYSIN statement.
Yifat.
-Original Message-
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf
Of Gerry Anstey
Sent: Tuesday, March 11, 2008 4:42 PM
To: IBM-MAIN@BAMA.UA.EDU
Subject: CA7 in batch
Listers
I am working on
*
Yifat Oren
[EMAIL PROTECTED]
OMTo
Sent by: IBM IBM-MAIN@BAMA.UA.EDU
From MVS System Management Facility:
13.80 Record Type 74 (4A) -- RMF Activity of Several Resources
Subtype 1 -- Device Activity
The record is written for all devices specified in the DEVICE
option for a Monitor I session.
HTH,
Yifat.
-Original Message-
From: IBM Mainframe
.
Hope that helps,
Yifat Oren.
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From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf
Of Pawel Leszczynski
Sent: Wednesday, January 27, 2010 12:56 PM
To: IBM-MAIN@bama.ua.edu
Subject: why compression costs additional I/O?
Hello everybody,
Recently
Ron,
Just to be sure someone mentions this;
Compressed Format sequential data sets are a special case of PS-E's.
From Macro Instructions for Data Sets':
Recommendation: For compressed format data sets, do not specify NCP (thus,
allowing the system to default it to 1) or specify NCP=1. This
, as it is not possible
that it actually found a record longer than 32,756 (RECFM is VB, not
spanned). Or am I missing something?
Has anybody experienced such error when trying to UNPACK SMF data?
Thanks,
Yifat Oren
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OF RECORD WAS NOT FOUND, INPUT DATA INVALID, but that's
just me :)
Best Regards,
Yifat Oren.
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Ron,
How does SMS striping measure up in regards to synchronous remote copy?
Locally, the same 40-50% I/O elapsed time savings can be gained by SMSingly
striping the data sets (into 2 or more stripes).
True, there is some CPU overhead for striping, but non-comparable to the
compression
Hi Fran,
DDNAME: INFILE DSNAME: NOSMS.FILE.PDS
The name of the input data set suggests a PDS; Is it?
TERSE can only handle sequential (PS) data sets (if I remember correctly).
Using the newer AMATERSE may (or may not :) ) produce clearer error
messages.
Best Regards,
Yifat
-Original
Tobias,
The reason you are not seeing the expected savings is that the IDCAMS REPRO
has already set and used the optimal number of data buffers regardless of
the DATACLAS change (so, no change has actually taken place; optimal
buffering was used for both before and after runs).
You should see
for REPRO because the default
CISZ for VSAM is 18K or 26K, and a large BUFND would not make a large
difference in elapsed time on a small to medium size dataset.
Ron
-Original Message-
From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On
Behalf Of
Yifat Oren
Sent
Hello All,
I have a sort of about 4GB, 15M records of variable length.
For some reason DFSORT chooses not to use dataspace/hiperspace or memory
objects for this sort for no obvious reason;
Parameters are all set corrects (EXPMAX, RES, OLD and HIPRMAX and so on).
The system is not paging at
For the records;
EXPMAX in effect was NOT set to MAX but much lower, which prevented DFSORT
from using any Hipersort option.
Many thanks to David Betten for his excellent assistance.
Best Regards,
Yifat
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John,
I would have used SORT-COPY (but if it's DFSORT make sure the VSAM BUFND
setting is optimal). It should be faster than IDCAMS (because of the better
TAPE I/O).
Are you sure you need to reorg at all?
I'm sure you are familiar with the cost of CA splits is mainly at split
time, etc., and
Hi Michael,
When DFSORT is invoked from another program (like DSNUTILB), SMF 30-4 (step)
will contain the total CPU time for the entire step and SMF 16 (one or more)
will contain CPU time accumulated while DFSORT was running.
HTH,
Yifat
-Original Message-
From: IBM Mainframe Discussion
Hi Johnny,
I was under the impression that for DFDSS DUMP, COMPRESS and HWCOMPRESS are
synonymous;
Are you saying they are not?
If you are writing to tape why not use the drive compaction(DCB=TRTCH=COMP)
instead?
Best Regards,
Yifat
-Original Message-
From: IBM Mainframe Discussion
Pardon my bringing back an old thread, but -
I wanted to see how much better is the COMPRESS option over the HWCOMPRESS
in regards to CPU time and was pretty surprised when my results suggested
that HWCOMPRESS is persistently more efficient (both CPU and channel
utilization -wise) than COMPRESS:
Hi,
When DFDSS makes a logical copy of an SMS-compressed data set (either
sequential or VSAM) - it tries to copy it as-is (track image) without
decompressing and re-compressing the data.
I wonder, does FDRCOPY behave in a similar manner?
Thanks in advance,
Yifat
Hi,
1. SMS requirement. 2. Some low-level programs do not accept EXT-PS.
Example: DFSMSdss dump dataset cannot be EXT-PS.
With DFSMS 1.12 this restriction was removed; from the DFSMSdss Storage
Administration:
With the DUMP command, you can dump DASD data to a basic sequential data
set, a
Hi Radoslaw,
In Using Data Sets it says that the optimum BLKSIZE for 3590 is: 262 144
(256 KB) except on some older models on which it is 229 376 (224 KB) ..
Your device seems to fall into the 2nd category for some (wrong?) reason..
Yifat.
-Original Message-
From: IBM Mainframe
Hello everyone,
Does CA-FAVER support LBI (large block) when writing to tape?
Thanks in advance,
Yifat Oren
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Thanks very much for the answers everyone.
LBI is being vey slowly adopted, isn't it? Even by IBM itself ..
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Or HSM FSR SMF records ..
-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf
Of Schwarz, Barry A
Sent: יום ה 11 אוגוסט 2011 14:01
To: IBM-MAIN@bama.ua.edu
Subject: Re: Anyone know how to HSM report of recalled datasets
It doesn't look like
Hi Enrique,
I suspect your IEBGENER is actually the Syncsort or Dfsort replacement for
IEBGENER.
When the sort product processes Basic Format data sets, it uses the EXCP
access method to read large block with each i/o performed (the EXCP count);
When the data set is Extended Format, the sort
Tuning Guide (1.12) seems to think 2GB is the upper limit when it
comes to recommending minimum virtual storage settings :)
Thanks,
Yifat Oren
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Hi Peter,
Have you seen the VSAM Demystified definition for SMBHWT?
SMBHWT: Used to allocate hiperspace buffers based on a multiple of the
number of address space virtual buffers that have been allocated. It can be
an
integer from 0 to 99. The value specified is not a direct multiple of the
Thank you for the tip, Lizette.
http://share.confex.com/share/117/webprogram/Handout/Session9940/SHARE%20994
0_IEBCOPY%20New%20Tricks.pdf
Best Regards,
Yifat Oren
-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf
Of Lizette Koehler
Sent
DB2-L at http://www.idug.org.
Best Regards,
Yifat
-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf
Of Arye Shemer
Sent: יום ב 26 דצמבר 2011 11:38
To: IBM-MAIN@bama.ua.edu
Subject: Looking DB2 for z/OS discussion list
Hello forummers,
Is
Hi,
This is the place to mention VSAM System Managed Buffering that could,
possibly, auto-tune the access to BLSR if the open intention was set
correctly by the programmer and enough region was available.
Best Regards,
Yifat
-Original Message-
From: IBM Mainframe Discussion List
Victor,
Are you using DFDSS DUMP or COPY?
The DUMP function will _not_ decompress the data set and will take a
physical copy of it.
Naturally, as it is already compressed, further compression when copying it
to tape will not be very beneficial.
Other utilities, such as IEBGENER. have to
Victor,
Logical dump of compressed format data sets does not decompress them.
This quote from the DFSMSdss Storage Administration sort-of implies that:
1. The COMPRESS keyword is ignored if it is specified during a logical
data set dump for either compressed-format sequential data
sets or
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