|
|
| Author |
Message |
Anuj D.
Senior Member
Joined: 22 Apr 2006
Posts: 1648
Location: Mumbai, India
|
|
|
|
Hi Gerry,
| gcicchet wrote: |
| what was the blocksize when written to tape ? |
It was 27920. |
|
| Back to top |
|
 |
References
|
 Posted: Tue Jul 22, 2008 4:51 pm Post subject: Re: |
|
|
|
|
gcicchet
Senior Member
Joined: 28 Jul 2006
Posts: 445
|
|
|
|
Hi Anuj,
I should have been clearer, what is the blocksize on the tape ?
Gerry |
|
| Back to top |
|
|
Anuj D.
Senior Member
Joined: 22 Apr 2006
Posts: 1648
Location: Mumbai, India
|
|
|
|
Hi Gerry,
| gcicchet wrote: |
| I should have been clearer, what is the blocksize on the tape ? |
You caught me, did you want me to run something like -
| Code: |
//STEP010 EXEC PGM=SYNCTOOL
//TOOLMSG DD SYSOUT=*
//DFSMSG DD SYSOUT=*
//DD01 DD DSN=HLQ.FIRST.FILE.TAPEC,
// DISP=SHR
//TOOLIN DD *
COUNT FROM(DD01)
/* |
where HLQ.FIRST.FILE.TAPEC is my tape file. If so message in DFSMSG is -
| Code: |
| DD01 : RECFM=FB ; LRECL= 80; BLKSIZE= 27920 |
|
|
| Back to top |
|
|
gcicchet
Senior Member
Joined: 28 Jul 2006
Posts: 445
|
|
|
|
Hi Anuj,
you need to copy from tape containing a blocksize greater than 27998 to prove whether the optimum blocksize is used when copying to dasd.
Gerry |
|
| Back to top |
|
|
Anuj D.
Senior Member
Joined: 22 Apr 2006
Posts: 1648
Location: Mumbai, India
|
|
|
|
Hi Gerry,
I'll give some more tries & get back to you, probably by tomorrow. Thanks for your patience. |
|
| Back to top |
|
|
dick scherrer
Global Moderator
Joined: 23 Nov 2006
Posts: 7470
Location: 221 B Baker St
|
|
|
|
Hello,
FWIW, Several of the sites i've supported (using both DFSORT and Syncsort) invoke the sort product for IEBGENER executions.
If the process is other than a simple copy operation, the sort product then invokes IEBGENER. |
|
| Back to top |
|
|
UmeySan
Senior Member
Joined: 22 Aug 2006
Posts: 624
Location: Germany
|
|
|
|
Hi Gerry !
We're also using IEBGENER with SYSIN DD * and ICEGENER is excecuting in background. It depends on installation. |
|
| Back to top |
|
|
gcicchet
Senior Member
Joined: 28 Jul 2006
Posts: 445
|
|
|
|
Hi,
in my shop it assumes that SYSIN DD * will have IEBGENER parameters hence IEBGENER is invoked.
If you have a SYSIN DD DSN= what will it invoke ?
Gerry |
|
| Back to top |
|
|
Anuj D.
Senior Member
Joined: 22 Apr 2006
Posts: 1648
Location: Mumbai, India
|
|
|
|
Hi,
Below are the statistics of SYSPRINT with different SYSIN parameters, does that convey something meaningful ? My shop uses SyncSort.
1. //SYSIN DD *
| Code: |
DATA SET UTILITY - GENERATE
IEB352I WARNING: ONE OR MORE OF THE OUTPUT DCB PARMS COPIED FROM INPUT
PROCESSING ENDED AT EOD |
2. //SYSIN DD DUMMY
| Code: |
DATA SET UTILITY - GENERATE
WER901I **WARNING** SYNCSORT 1.2.3.0 WILL EXPIRE IN 18 DAYS
WER276B SYSDIAG= 4048092, 8503163, 8503163, 6064567
WER164B 4,992K BYTES OF VIRTUAL STORAGE AVAILABLE, MAX REQUESTED,
WER164B 44K BYTES RESERVE REQUESTED, 4,196K BYTES USED
WER146B 4K BYTES OF EMERGENCY SPACE ALLOCATED
WER108I SYSUT1 : RECFM=FB ; LRECL= 80; BLKSIZE= 27920
WER110I SYSUT2 : RECFM=FB ; LRECL= 80; BLKSIZE= 27920
WER410B 3,960K BYTES OF VIRTUAL STORAGE AVAILABLE ABOVE THE 16MEG LINE,
WER410B 0 BYTES RESERVE REQUESTED, 3,952K BYTES USED
WER211B SYNCSMF CALLED BY SYNCSORT; RC=0000
WER449I SYNCSORT GLOBAL DSM SUBSYSTEM ACTIVE
WER416B SYSUT1 : EXCP'S=2,UNIT=3490,DEV=30D8,CHP=35B575F5
WER416B SYSUT2 : EXCP'S=1,UNIT=3390,DEV=BB1F,CHP=(151719959799,2),VOL=MIZAB5
WER416B TOTAL OF 3 EXCP'S ISSUED FOR COPYING
WER054I RCD IN 5, OUT 5
WER169I RELEASE 1.2 BATCH 0453 TPF LEVEL 3.0
WER052I END SYNCSORT - PU2317AU,STEP1OF1,,DIAG=C000,D303,E8BD,ECF5,8952,6CAB,A
SYNCSORT COPY FEATURE CALLED - RC = 0 |
|
|
| Back to top |
|
|
gcicchet
Senior Member
Joined: 28 Jul 2006
Posts: 445
|
|
|
|
Hi Anuj,
the SYSIN DD * is using IEBGENER and SYSIN DD DUMMY is using the SYNCSORT program.
When SYSIN DD DUMMY is coded it knows that it's a straight copy so it uses the SYNCSORT program which is more efficient than IEBGENER.
When SYSIN DD * is coded it thinks you may be passing IEBGENER SYSIN parameters so IEBGENER is used.
Gerry |
|
| Back to top |
|
|
Anuj D.
Senior Member
Joined: 22 Apr 2006
Posts: 1648
Location: Mumbai, India
|
|
|
|
Hi Gerry,
It means my & your shops are following the same "rules" as far as this thread is concerned, let's wait what others have to say, till then I'll experiment a little more on BLKSIZE thing, thanks again. |
|
| Back to top |
|
|
|
|
