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sreelekshmi
New User
Joined: 16 Jan 2007 Posts: 9 Location: Bangalore
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I need to read an indexed vsam file sequentially from the beginning.If I give the access as 'DYNAMIC' and the passing LOW-VALUES to the key and then using START file name ,will it works?
Also do I need to use READ filename NEXT record or simple READ is enough?
If I need to read the file till the end of file,then every time do I need to used the READ fielname NEXT record statement?
Sree |
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Aji
New User
Joined: 03 Feb 2006 Posts: 53 Location: Mumbai
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Follow the below mentioned sequence.
Initialize the key.
Start file-name .....
p1.
Read file-name next record at end perform end-para.
Do the process
go to p1.
Aji |
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kussu Warnings : 1 New User
Joined: 16 May 2007 Posts: 33 Location: India
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U can give Access Mode as Sequential |
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nagireddynarva
New User
Joined: 30 Apr 2005 Posts: 5 Location: hyderabad
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give access mode as sequential |
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stodolas
Active Member
Joined: 13 Jun 2007 Posts: 632 Location: Wisconsin
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I've always been told that processing a VSAM sequentially is very bad from a performance perspective. I know at our shop, the system recognizes this kind of access and throttles your access so you get less CPU. |
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