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How to decrease the merging processing time for tape process

 
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debasish
Beginner


Joined: 26 May 2004
Posts: 1
Topics: 1
PostPosted: Wed May 26, 2004 5:38 am    Post subject: How to decrease the merging processing time for tape process Reply with quote
Friends, we are helpless as the following merging process is taking 10 hours...For both the SORTIN01 & SORTIN02 there are 32 tapes to be mounted...Pls. suggest if you have any better idea about this issue.
JCL is as given below.......
Code:

R045     EXEC PGM=SORT                                     
SORTIN01 DD  DSN=&P..STM100DP.N040.OARCHIVE(0),           
             DISP=SHR                                     
SORTIN02 DD  DSN=&P..STM560DP.R050.AXA.OARCHIVE(0),       
             DISP=SHR                                     
SORTOUT  DD  DSN=&P..SVU420MP.R045.SORTOUT.OARCHIVE,       
             DISP=(NEW,CATLG,DELETE),                     
             UNIT=3490,                                   
             VOL=(,,,250),                                 
             LABEL=RETPD=3650,                             
             DCB=(DLJ.MODLDSCB,RECFM=FB,LRECL=600,BUFNO=15)
SYSIN    *
MERGE FIELDS=(544,57,CH,A)         
INCLUDE COND=(35,3,CH,EQ,C'010',OR,
              35,3,CH,EQ,C'022',OR,
              35,3,CH,EQ,C'025',OR,
              35,3,CH,EQ,C'200',OR,
              35,3,CH,EQ,C'300')   
/*
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taltyman
JCL Forum Moderator
JCL Forum Moderator


Joined: 02 Dec 2002
Posts: 310
Topics: 8
Location: Texas
PostPosted: Wed May 26, 2004 3:09 pm    Post subject: Reply with quote
How often does this run? How many tapes for output? What blocksize for output are you gettin?
If it runs often you are gonna need a warehouse in 10 years....
Can you use larger capacity tapes so you get less mounts?
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Bill Dennis
Advanced


Joined: 03 Dec 2002
Posts: 579
Topics: 1
Location: Iowa, USA
PostPosted: Thu May 27, 2004 7:58 am    Post subject: Reply with quote
You can use UNIT=(3490,2) on each input to allocate 2 drives and eliminate rewind wait time.

If the volumes are virtual and recall time is an issue, you may want to specify even more than 2 units so mount/recall is complete before the volume is needed.

Regards,
Bill
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