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  • Subject: Re: Help!!!!! Access path size
  • From: Bob Buchanan <BobbyB@xxxxxxxxxxx>
  • Date: Thu, 24 Aug 2000 19:04:10 -0700

Did you ever get any satisfactory answer to this query?  

The fastest possible way to convert the access paths (from the time you
start until all are done) is to do the following:

1) Create a blank set of physical/logical files with the attributes you want.

2) Create an RPG program or REXX script to read from the old file into
the new file and run it.  CPYF will not produce the results you want, as
it invalidates and rebuilds the logicals

3) Replace the old files with the new files.

This is the fastest beginning to end because all the indexes are updated
as records are added to the file.  Any other method will read all the
records in the physical file up to 50 times.  It may be less due to
access path sharing, but it isn't likely to be much less.

-Bob Buchanan
 Camstar Systems, Inc.

> cjimenez@wlgore.com wrote:
> 
> We need to know the fastest possible way to convert the access path
> size
> attribute on an 16GB file that has over 50 logicals attached to it
> with an
> additional 45GB. What method do you know and how long do you think it
> will take.
> I will appreciate any and all input regarding this task.
> 
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