• Subject: Fw: AS400 Library Lists...
  • From: "Robert A. Rogerson" <rogerson@xxxxxxxxxxxx>
  • Date: Thu, 22 Jan 1998 19:37:15 -0500

It seemed in the past there were a few questions about combining JBA
library lists.  I posed a question to the comp.sys.ibm.as400.misc news
group and I thought a few of you may be interested in the responses.

Robert A. Rogerson

----------
> From: Robert A. Rogerson <rogerson@interlog.com>
> To: 'Robert A. Rogerson' <rogerson@interlog.com>
> Subject: Fw: AS400 Library Lists...
> Date: Thursday, January 22, 1998 7:08 PM
> 
> 
> 
> Robert A. Rogerson <rogerson@interlog.com> wrote in article
<01bd25ff$a0d2f530$f5f4e1cc@rob>...
> > Is there any performance difference in the following scenario?              
> > 
> > 1. One library with 1000 objects.
> > 2. 10 libraries with 100 objects.
> > 
> > I understand that in (2) if the object were found in a library near the
top
> > of the library list the access would be very quick.  My question is
this,
> > with one big library is there a pointer to the object required or does
the
> > OS have to scan all the objects in the library until it finds the one
> > required.  If there is a pointer then would it not be faster to access
any
> > object in one huge library than to access an object in the second
library. 
> > The OS would be checking the existence of the object in the first
library
> > then the second...until the library list has been scanned.
> > 
> > I hope some of you system gurus can help as I am just a lowly
application
> > guy...              
> > 
> > Robert A. Rogerson
> > 
> 
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