Physical and Logical files in different libraries?

[lfirmat]

People, I am working in a client that has one PF in one library and two LF in also two different libraries.

It doesnt look good for me. But I cant remember why IBM recommeds that PF & LF must be in the same library. (I always knew this)

Can somebody give me a little help with my memory?

Thanks in advance

Luis

 

[Emad_S_Banoub74]

for ease of maintenance, the two libraries must be in your library list!






lfirmat <[email protected]>
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07/02/2007 12:39 PM
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Physical and Logical files in different libraries?






People, I am working in a client that has one PF in one library and two LF
in also two different libraries.

It doesnt look good for me. But I cant remember why IBM recommeds that PF
& LF must be in the same library. (I always knew this)

Can somebody give me a little help with my memory?

Thanks in advance

Luis

 

[Jim_rubino]

Either way the two libraries would need to be in your library list that
you are signed on to. For the ease creating the logicals, and for using
them....they should be in the same library. When you create a logical
file WITHOUT prompting the command the command assumes the PF is in the
same library that you are creating the logical file in. In order to put
the logical in a different library you would have to prompt the create
command and specify the logicals library and the PF's.
Another way this could have been put into a different library is if the
logical was created into the same library as the PF and then the logical
was moved to the different library.

This is my take on this....
Jim

 

[John_Dickey]

Luis,

Why does IBM recommend this? Well, if you have to do a system
restore (disaster recovery) and you restore the library with the logical
file first, the logical file restore will FAIL. You would be okay if
the library with the physical file is restored first. But if you cannot
be sure of that, then you have to check all your restores to see if
anything did not get restored, identify why, and probably go back and
restore those objects again - a real pain. You also run a risk if you
save one library and not the other libraries. So a lot safer to put
them in the same library.

John Dickey
Financial Systems Administrator
White-Rodgers, division of Emerson Electric
8100 West Florissant Ave.
P.O. Box 36922
St. Louis, MO 63136-9022
314-553-3067
[email protected]

 

[Dave Kahn...]

This is the main reason it is a good idea to have physical and logical
files in the same library. One argument for having them in separate
libraries is that the physicals files can be in a secured library with
no public access so that users only ever see logical files. This is
not applicable to JDE where the physical files need to be accessed
directly.

If physical and logical files must be in different libraries (and I
can't see any good reason for it in JDE) one trick is to ensure that
the name of the library containing the physical files comes before the
names of all the libraries containing logicals in the alphanumeric
collating sequence. This will usually ensure that the libraries are
restored in the correct order. As ever avoid using 10 character
library names in JDE as this causes problems during the upgrade
process.

--
Dave...

 

[lfirmat]

Thanks a lot, Dave.
And thanks to everybody who answered.

"Dave Kahn..." <[email protected]> escribió:

This is the main reason it is a good idea to have physical and logical
files in the same library. One argument for having them in separate
libraries is that the physicals files can be in a secured library with
no public access so that users only ever see logical files. This is
not applicable to JDE where the physical files need to be accessed
directly.

If physical and logical files must be in different libraries (and I
can't see any good reason for it in JDE) one trick is to ensure that
the name of the library containing the physical files comes before the
names of all the libraries containing logicals in the alphanumeric
collating sequence. This will usually ensure that the libraries are
restored in the correct order. As ever avoid using 10 character
library names in JDE as this causes problems during the upgrade
process.

--
Dave...

Dave...