What is the link pack area?



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What is the link pack area?

Postby thulasibabu » Tue Oct 07, 2008 2:09 pm

what is link pack area and their types..whether plpa,flpa is part of dasd.. please i need the brief about this
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Re: What is the link pack area?

 

Re: What is the link pack area?

Postby dick scherrer » Wed Oct 08, 2008 5:32 am

Hello,

Notice that your question has been split from your original topic and placed in a new topic.

When you have a question, start a new topic for your new question. Also, you will usually get faster/better replies if you place your question in the right part of the forum.
Hope this helps,
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Re: What is the link pack area?

Postby dick scherrer » Wed Oct 08, 2008 5:51 am

Hope this helps,
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Re: What is the link pack area?

Postby sekhar.raj111 » Wed Aug 11, 2010 2:52 pm

hi
any one tellme when the -305error occurs? what is null indicator?
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Re: What is the link pack area?

Postby sekhar.raj111 » Wed Aug 11, 2010 2:54 pm

hi
can any one send me casestudys in banking domaine
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Re: What is the link pack area?

Postby NicC » Wed Aug 11, 2010 4:46 pm

What have either of these to do with LPA? Please post in the correct sections of the forum.

-305 - read the manual, null indicator - ditto but different manual.
The problem I have is that people can explain things quickly but I can only comprehend slowly.
Regards
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Re: What is the link pack area?

Postby steve-myers » Thu Aug 12, 2010 1:02 am

To get back to topic.

The Link Pack Area (LPA) is a collection of programs and fixed tables that appear to be programs that are loaded into storage when the system is started, or to use our quaint term, IPLed. These programs and tables can be used by any program at any time.

There are several minor variations.

The "fixed" LPA (FLPA) has its pages arranged so the system will always have them in main storage. Pages assigned to the "regular" LPA can be paged out of main storage.

The "modified" LPA (MLPA) has its pages arranged so they can be altered. Pages in the regular LPA cannot be altered. This capability has always seemed stupid to me, but there are a few modules where this is a requirement.

Given that many z/OS systems are rarely IPLed these days often means that using LPA is not always a good idea, since the only way for an update to "take" is to IPL the system. For this reason user programs are rarely placed in the LPA; it's just for IBM provided programs.
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