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vsam tuning

 
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subhi_dhanbad
Beginner


Joined: 30 Sep 2005
Posts: 3
Topics: 2

PostPosted: Sat Nov 04, 2006 5:55 am    Post subject: vsam tuning Reply with quote

Hi ,

I have a huge VSAM file in production.The data and the index is stored in multiple volumes. It is defined as below:-

DATA -
(NAME(V2.BBB.RRR.PYTFIL.DATA) -
RECORDSIZE(923 923) -
FREESPACE(25 25) -
CISZ(8192) -
KEYS(39 3) -
TRK(1000 1000) ) -
INDEX -
(NAME(V2.BBB.RRR.PYTFIL.INDEX) -
CISZ(1024) -
TRK(1 1) )

The index is spread into 183 extents. I need to compress it.
I have created a test jcl to define a test vsam as --
INDEX(NAME(W2.BBB.RRRSK.PYTFIL.INDEX) -
CYLINDERS(12 1) -
CONTROLINTERVALSIZE(1024))

Then I am copying the production data into test file.
But it is not able to copy the whole data.It abends with Vsam return code 28.
If I give the TRK(1 1) and CISZ(1024) it copies the whole production data into the test file.
Can anyone suggest me the reason and solution ?

Thanks,
Subhi.
_________________
Regards,
Subhi B.
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kolusu
Site Admin
Site Admin


Joined: 26 Nov 2002
Posts: 12357
Topics: 75
Location: San Jose

PostPosted: Sun Nov 05, 2006 6:11 pm    Post subject: Reply with quote

subhi_dhanbad,

You need to allocate your test vsam cluster as EXTENDED . Also Try increasing the Space allocation.

While you are at it check this link

http://www.mvsforums.com/helpboards/viewtopic.php?p=23821#23821

Hope this helps...

Cheers

Kolusu
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Kolusu - DFSORT Development Team (IBM)
DFSORT is on the Web at:
www.ibm.com/storage/dfsort

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