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How to improve the performance of SYNCSORT
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seman18

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PostPosted: Fri Mar 12, 2010 7:01 am    Post subject: How to improve the performance of SYNCSORT
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I doubt if I can reduce the eclipsed time for following job, can someone give any advices, thx! BTW, the sortin is tape file, and sortout is ps file
Code:

//SORT  EXEC  PGM=SYNCSORT,REGION=0K                             
//SORTIN   DD  DSN=XXX.XXX.DAILY(0),DISP=SHR       
//SORTOUT  DD  DSN=XXXX,XXXX,XXXX,DISP=(NEW,CATLG,DELETE),
//            UNIT=SYSDA,                                       
//            SPACE=(CYL,(25,32),RLSE),                         
//            DCB=(RECFM=FB,LRECL=1092,BLKSIZE=22932)                   
       
//SORTWK01 DD  UNIT=SYSDA,                                       
//             SPACE=(CYL,(20,32),RLSE)                         
//SORTWK02 DD  UNIT=SYSDA,                                       
//             SPACE=(CYL,(20,32),RLSE)                         
//SORTWK03 DD  UNIT=SYSDA,                                       
//             SPACE=(CYL,(20,32),RLSE)       
//SORTWK04 DD  UNIT=SYSDA,                             
//             SPACE=(CYL,(20,32),RLSE)               
//SORTWK05 DD  UNIT=SYSDA,                             
//             SPACE=(CYL,(20,32),RLSE)               
//SORTWK06 DD  UNIT=SYSDA,                             
//             SPACE=(CYL,(20,32),RLSE)               
//SYSOUT   DD  SYSOUT=*                               
//SYSPRINT DD  SYSOUT=*                               
//SYSIN  DD *                                         
  SORT FIELDS=(1,4,CH,A,11,9,CH,A,28,6,CH,A)           
  INCLUDE COND=(9,2,CH,EQ,C'00',AND,135,1,CH,EQ,C'1')                   
[/code]
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CICS Guy

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PostPosted: Fri Mar 12, 2010 7:20 am    Post subject:
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Can you do buffers on the SORTIN? Do you need to do buffers on the SORTIN?
Does the INCLUDE take effect after the sort or before?
The RLSEs are not needed, are any of the SORTWKs needed? Is your specifing them limiting Syncsort's own abilities to dynamically allocating a better value/number?
Have you checked your sort manual?
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Terry Heinze

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PostPosted: Fri Mar 12, 2010 8:04 am    Post subject:
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Both Syncsort and DFSORT use their own BUFNO values for input and output.
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gcicchet

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PostPosted: Fri Mar 12, 2010 8:05 am    Post subject:
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and INCLUDE takes effect before the sort


Gerry
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Anuj Dhawan

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PostPosted: Fri Mar 12, 2010 1:27 pm    Post subject:
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You might like to consider PARASORT as your SORTIN is on tape. Is yout sortin multi-volume? Then too ,you should be considering PARASORT. PARASORT allows you to read more than one volume at a time. PARASORT is fully documented in Chapter 10 of the SyncSort for z/OS Programmer's Guide.
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Anuj Dhawan

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PostPosted: Fri Mar 12, 2010 1:32 pm    Post subject:
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Quote:
I doubt if I can reduce the eclipsed time for following job, can someone give any advices, thx! BTW, the sortin is tape file, and sortout is ps file
  • What is eclipsed, in this context?
  • I believe you meant elapsed time?
  • If yes, how much elapsed time?
  • How many records are there in sort-in, any estimate you have?
  • Quote:
    and sortout is ps file
    ok, file on tape is also, essentially, a sequential file - did you mean it's on DASD?
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Anuj Dhawan

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PostPosted: Fri Mar 12, 2010 1:36 pm    Post subject:
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One more time - Tuning SyncSort is usually application specific. So, we'll be intrested to see "B" messages, if they are not already present in SYSOUT, you can add the following to the sort step(s) in question:
Code:
//$ORTPARM DD *
 MSG=AP,LIST,BMSG
and post us back the details.
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Marso

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PostPosted: Fri Mar 12, 2010 1:54 pm    Post subject:
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You can try any (or all) of the following:
  • Run the sort without SORTWK. Syncsort should be smart enough to allocate exactly what it needs, and that may be different from what you gave.
  • Copy the tape to disk and run the sort from there. You will be able to see the cost of the tape reading and of the sort itself separately.
  • Check if the blocksize for the tape records is optimized. Small blocks may lead to a lot of I/Os and be costly.
Come back to tell us what happened.
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seman18

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PostPosted: Fri Mar 12, 2010 2:34 pm    Post subject:
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I remove the sortwk statement, however, it doesn't help.
how can I do buffer on sortin, I will try it!
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Anuj Dhawan

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PostPosted: Fri Mar 12, 2010 2:47 pm    Post subject:
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seman18 wrote:
I remove the sortwk statement, however, it doesn't help.
Removing sortwork should not affect elasped time, if you code them sort will look for them (and they will be checked for syntax error) otherwise it'll pick, how many are neede, as per DYNALLOC parameter.

I hope other posts of mine are visible at other end (some body tell me icon_smile.gif)- you might like to consider them...
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PeterHolland

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PostPosted: Fri Mar 12, 2010 3:26 pm    Post subject:
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How about operator intervention time for tape handling?
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Terry Heinze

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PostPosted: Fri Mar 12, 2010 5:57 pm    Post subject:
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seman18 wrote:
how can I do buffer on sortin, I will try it!
See my previous post, seman18.
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mmwife

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PostPosted: Sat Mar 13, 2010 8:17 pm    Post subject:
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Hi Seman,

Anuj's suggestion of PARASORT is probably your best bet. Peter's ques about vol mount delays can be be addressed by specifying 2 tape units in your JCL. It also can negate the time lost in tape rewinds.

But that assumes the tape operator hasn't fallen asleep. icon_smile.gif
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seman18

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PostPosted: Mon Mar 15, 2010 3:11 pm    Post subject:
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I try to use parasort based on this discussion, however, I got JCL Error
Code:
//SORT  EXEC  PGM=SYNCSORT,PARM='PARASORT,NOEQUALS'         
//SORTIN   DD  DSN=xxx.xxx.xxx(0),DISP=SHR   
//SORTPAR1 DD DSN=*.SORTIN,DISP=OLD,UNIT=AFF=SORTIN         
//SORTPAR2 DD DSN=*.SORTIN,                                 
// DISP=(NEW,KEEP,KEEP),UNIT=(CART,,DEFER),VOL=PRIVATE     
***ERROR  - DSS4352E - DISP FIELD INCOMPATIBLE WITH DSNAME 
//SORTPAR3 DD DSN=*.SORTIN,                                 
// DISP=(NEW,KEEP,KEEP),UNIT=(CART,,DEFER),VOL=PRIVATE     
***ERROR  - DSS4352E - DISP FIELD INCOMPATIBLE WITH DSNAME 
//SORTPAR4 DD DSN=*.SORTIN,                                 
// DISP=(NEW,KEEP,KEEP),UNIT=(CART,,DEFER),VOL=PRIVATE     
***ERROR  - DSS4352E - DISP FIELD INCOMPATIBLE WITH DSNAME 
//SORTOUT  DD  DSN=xxx.xxx.xx,DISP=OLD           
//SYSOUT   DD  SYSOUT=*                                     
//SYSPRINT DD  SYSOUT=*                                     
//SYSIN  DD *                                               
  SORT FIELDS=(1,4,CH,A,11,9,CH,A,28,6,CH,A)               
  INCLUDE COND=(9,2,CH,EQ,C'00',AND,135,1,CH,EQ,C'1') 
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Anuj Dhawan

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PostPosted: Mon Mar 15, 2010 3:56 pm    Post subject:
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Code:
***ERROR  - DSS4352E - DISP FIELD INCOMPATIBLE WITH DSNAME

Code:
***ERROR  - DSS4352E - DISP FIELD INCOMPATIBLE WITH DSNAME 

Code:
***ERROR  - DSS4352E - DISP FIELD INCOMPATIBLE WITH DSNAME
All these are JCL syntax-check errors - And before you use SORTPARn, you need to decide for SORTIN if that qualifies for any of these cases:

• A multi-volume cataloged data set
• A multi-volume uncataloged data set
• Concatenated single and multi-volume uncataloged data sets
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Terry Heinze

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PostPosted: Mon Mar 15, 2010 7:02 pm    Post subject:
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It looks like you've defined some of your input data sets as NEW and your output as OLD.
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seman18

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PostPosted: Tue Mar 16, 2010 8:12 am    Post subject:
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hi Anuj Dhawan,
How can I indentify which case the sortin belong to, and then how to modify the sortin statement, thx!
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dick scherrer

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PostPosted: Tue Mar 16, 2010 9:09 am    Post subject:
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Hello,

Quote:
How can I indentify which case the sortin belong to
What is the question here? What is "case"?

Terry told you of some problems. Have you corrected them?

What happened?
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seman18

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PostPosted: Wed Mar 17, 2010 8:22 am    Post subject:
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I got the SYNCSORT Programming guide, and use the synclist to get the following information
Code:

           3420     3480/90     3490E       3590       
       |----------|----------|----------|----------|   
 4-WAY |   NOT    |   NOT    |  PARE41  |   NOT    |   
 INPUT | POSSIBLE | POSSIBLE |  PARE42  | POSSIBLE |   
       |          |          |  PARE43  |          |   
       |          |          |  PARE44  |          |   
       |----------|----------|----------|----------|   
 3-WAY |   NOT    |   NOT    |  PARE31  |   NOT    |   
 INPUT | POSSIBLE | POSSIBLE |  PARE32  | POSSIBLE |   
       |          |          |  PARE33  |          |   
       |----------|----------|----------|----------|   
 2-WAY |   NOT    |   NOT    |  PARE21  |   NOT    |   
 INPUT | POSSIBLE | POSSIBLE |  PARE22  | POSSIBLE |   
       |----------|----------|----------|----------|   

and I got the dataset in tape's detail using listcat as following
Code:

 VOLSER------------411991     DEVTYPE------X'78048081'
 VOLSER------------414254     DEVTYPE------X'78048081'
 VOLSER------------414693     DEVTYPE------X'78048081'
 VOLSER------------415183     DEVTYPE------X'78048081'
 VOLSER------------415642     DEVTYPE------X'78048081'
 VOLSER------------416409     DEVTYPE------X'78048081'
 VOLSER------------416862     DEVTYPE------X'78048081'

then I modify my jcl, and got following error
Code:

//SORT  EXEC  PGM=SYNCSORT,PARM='PARASORT,NOEQUALS'             
//SORTIN   DD  DSN=xxx.xxx.xx(0),DISP=(OLD,KEEP),
//             UNIT=(PARE41,2,DEFER)                             
***ERROR  - DSS4940E - UNABLE TO IDENTIFY UNIT NAME "PARE41 "   
//SORTPAR1 DD DSN=*.SORTIN,DISP=OLD,UNIT=AFF=SORTIN             
//SORTPAR2 DD DSN=*.SORTIN,                                     
// DISP=(,KEEP,KEEP),UNIT=(PARE42,2,DEFER),VOL=PRIVATE           
***ERROR  - DSS4352E - DISP FIELD INCOMPATIBLE WITH DSNAME       
***ERROR  - DSS4940E - UNABLE TO IDENTIFY UNIT NAME "PARE42 "   
//SORTPAR3 DD DSN=*.SORTIN,                                     
// DISP=(,KEEP,KEEP),UNIT=(PARE43,2,DEFER),VOL=PRIVATE           
***ERROR  - DSS4352E - DISP FIELD INCOMPATIBLE WITH DSNAME       
***ERROR  - DSS4940E - UNABLE TO IDENTIFY UNIT NAME "PARE43 "   
//SORTPAR4 DD DSN=*.SORTIN,                                     
// DISP=(,KEEP,KEEP),UNIT=(PARE44,2,DEFER),VOL=PRIVATE           
***ERROR  - DSS4352E - DISP FIELD INCOMPATIBLE WITH DSNAME       
***ERROR  - DSS4940E - UNABLE TO IDENTIFY UNIT NAME "PARE44 "   
//SORTOUT  DD  DSN=xxx.xxx.xxx,DISP=OLD                 

Device type is 78048081,which repsent 3490, so based the synclist information, does it means I cannot use parasort on this tape?
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Terry Heinze

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PostPosted: Wed Mar 17, 2010 8:44 am    Post subject:
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I don't have access to a Syncsort manual and you do. Aren't there any JCL examples in it for use with the PARASORT parameter?
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