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vasanthz
Global Moderator
Joined: 28 Aug 2007
Posts: 1742
Location: Tirupur, India
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Hi,
Wonder if you could help me with this. 
A large dataset say 10,000 Cyls needs to be sorted.
with the option,
OPTIONS='DYNALLOC,SORTWKNO=1',SORT=100,
As you can see, the SORTWKNO is very less,
Is there any rule to choose the optimal SORTWKNO specification
and the BUFNO specification.
Also could you please let me know the effect, if large SORTWKNO is mentioned, say SORTWKNO=10 , and BUFNO=60.
Thanks in advance.  |
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murmohk1
Senior Member
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Joined: 29 Jun 2006
Posts: 1436
Location: Bangalore,India
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vasanthz
Global Moderator
Joined: 28 Aug 2007
Posts: 1742
Location: Tirupur, India
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Hi murmohk,
I wanted to know if there is any rule for the same.
In a generalised scenario. |
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Frank Yaeger
DFSORT Developer
Joined: 15 Feb 2005
Posts: 7129
Location: San Jose, CA
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| Quote: |
| OPTIONS='DYNALLOC,SORTWKNO=1',SORT=100, |
These seem to be options for a program that's calling DFSORT. It's not clear if SORTWKNO=1 causes one JCL SORTWKdd data set to be used or sets DYNALLOC=(,1) or does something else.
| Quote: |
| Is there any rule to choose the optimal ... BUFNO specification. |
DFSORT does not pay any attention to BUFNO for work data sets. It does it's own buffer optimization.
| Quote: |
| Is there any rule to choose the optimal SORTWKNO specification |
As I said before, the best approach is to let DFSORT allocate the work data sets dynamically. DFSORT's shipped default for the number of dynamically allocated work data sets is 4. The site can change that default. I would suggest using the site default unless there's some reason to override it. |
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vasanthz
Global Moderator
Joined: 28 Aug 2007
Posts: 1742
Location: Tirupur, India
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Frank Yaeger
DFSORT Developer
Joined: 15 Feb 2005
Posts: 7129
Location: San Jose, CA
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