RE: Keyed PF

["Booth Martin" <Booth@xxxxxxxxxxxx>]

It is my bellief that in early years data was often on tab cards and would
be sorted.  There really was no such thing as "original arrival sequence"
after the first sort.   This paradigm continued on into magentic media.  

Still today there is no guarantee that a reorganize command will leave a
file in a particular order beyond that defined within the reorganize process
itself.  

What if your process depended upon arrival sequence and some other process
GSORTed the file alphabetically?  You'd think the Great God of Data had
created a miracle on your disk.  :)

Additionally, we have no promises as to future technologies.  If web stuff
continues its growth, not even arrival sequence will have meaning as records
come in from all over the world.
 
 
 
---------------------------------------------------------
Booth Martin   http://www.MartinVT.com
Booth@xxxxxxxxxxxx
---------------------------------------------------------
 
-------Original Message-------
 
From: Midrange Systems Technical Discussion
Date: Friday, February 21, 2003 20:58:14
To: midrange-l@xxxxxxxxxxxx
Subject: RE: Keyed PF
 
midrange-l-request@xxxxxxxxxxxx wrote:

> 10. RE: Keyed PF (Henrik Krebs)
>
> Also: Why should anybody in Rochester code the internals in a randomizing
way?

Probably true that it wouldn't be deliberately coded in a randomizing way.
But the internal code _might_ be changed at any time in order to change
performance or add new function, and the future changes are unpredictable
and can't be guaranteed to result in the same order as today, right?

Tom Liotta

-- 
-- 
Tom Liotta
The PowerTech Group, Inc.
19426 68th Avenue South
Kent, WA 98032
Phone 253-872-7788 x313
Fax 253-872-7904
http://www.powertechgroup.com


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