Re: Chaining with a very large file

Douglas,

If by 'chain' you mean retrieving 1 single record having a unique key, you 
can't beat the performance (I think) of using a keyed logical and native 
I/O.

As always, YMMV.

Peter Colpaert
Application Developer
PLI - IT - Kontich, Belgium
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"Douglas W. Palme" <dpalme@xxxxxxxxxxx> 
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01/02/2006 15:08
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Subject
Chaining with a very large file






we may be faced with having to allow an interactive program to do a chain 
to 
a very large file; one with approximately 1.1 billion records and a file 
size of approximately 9.7gb of disk space.

Are there any performance issues that I should take into consideration? 
Should I consider breaking the data down into multiple files? 

The file will have a total of three numeric fields, all packed, 5 digits 
for 
the first two and 4 digits for the third.

Suggestions, thoughts, helpful hints.....would all be appreciated.


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