RE: Using Members within a PF

Hi:

In a number of cases, we use different members to hold data that is
pertinent to different ... functions? departments? users? ... that would
be in danger of being overwritten if, for example, two users attempted to
use the file at the same time. With a proper override, the file structure
does not need to be changed, and in some cases processing speed is much
faster.

Darrell

Darrell A. Martin - 630-754-2141
Manager, Computer Operations
dmartin@xxxxxxxxxxxxx

midrange-l-bounces@xxxxxxxxxxxx wrote on 07/10/2007 09:08:32 AM:

Ok, thanks for the clarification.

Now does it make sense to have multiple members attached to a work file?
This PF that has the three members attached - the original member, and
one for each of the plants (P1 and P2). There are several programs that
run that will clear write to and clear out of this PF several times a
day. Based on what Nathan mentioned in his response, it would make
sense if the data was to be retained, but in this case it is only
retained until the report is printed and then it is nuked. Furthermore
the number of records written is not substantial enough to warrant the
additional layer of filtering. I really don't see any advantage in this
case.

Any advice?

Thanks!

/b;

-----Original Message-----
From: Wilt, Charles [mailto:WiltC@xxxxxxxxxx]
Sent: Tuesday, July 10, 2007 9:21 AM
To: Midrange Systems Technical Discussion
Subject: RE: Using Members within a PF

Uh, no. <grin>

A file doesn't contain data records.

A file contains members. Members contain data records.

Every PF has at least one member, (if you want to store any records
anyway).

Logical file members point to one or more PF members.

HTH,
Charles

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Brian Piotrowski
Sent: Tuesday, July 10, 2007 9:04 AM
To: Midrange Systems Technical Discussion
Subject: Using Members within a PF

Hi All,



I've been going through the code with a fellow programmer
here at work, and we've noticed that the original programmers
created physical files and then added members to the file.
The programmers have then created a logical file on top of
the original physical file and use these members within the RPG code.



Can some please explain what advantage there is to this practice?
Wouldn't the logical file negate the need for the members
within the physical file?



The practice of adding members to physical files does not
appear to be the case for most of the PFs in our system -
only a few of the work files exhibit this trait. Would we be
better off to eliminate the members and just use the straight
LFs for our work?



Thanks,



/b;



-=-=-=-=-=-=-=-=-=-=-=-=-=-
Brian Piotrowski
Assistant Mgr. - I.T.
Simcoe Parts Service, Inc.
Ph: 705-435-7814 x343
Fx: 705-435-6746
-=-=-=-=-=-=-=-=-=-=-=-=-=-



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