How to dynamically allocate/deallocate a QSAM File?

sandhyarenu · New User Joined: 04 Jan 2007 Posts: 16 Location: India

Hi,

Could someone help me with the assembler command to dynamically allocate/deallocate a QSAM File ? I am not sure what these keywords S99VERB,S99VRBIN could mean.

bharath_gct2002 · Posted: Thu May 22, 2008 8:47 pm Post subject:

http://publib.boulder.ibm.com/infocenter/zos/v1r9/topic/com.ibm.zos.r9.ieaa800/sjdynal.htm#sjdynal

http://publib.boulder.ibm.com/infocenter/zos/v1r9/index.jsp?topic=/com.ibm.zos.r9.ieaa800/reqsvc.htm

These are some good documentations on DYNALLOC from IBM. It has answers to all your questions.

Please let me know this helps.
Bharath

ironmike · New User Joined: 07 Aug 2005 Posts: 37

As the Count of Monte Christo said, "It's complicated..."

You have to build a dynamic allocation parameter block by populating it with the dynamic allocation text units you want to use. There are different types of text units that describe different types of files or devices, even SYSOUT. You then issue the DYNALLOC macro or SVC 99.

Look at the above referenced documents, and @ IBM macros IEFZB4D0 and IEFZB4D2.

Start simple, just try to allocate the file, then if that works try a separate request to free the file.

sandhyarenu · New User Joined: 04 Jan 2007 Posts: 16 Location: India

Thanks much for all the help !!

Will try out !

Pankaj Gupta · New User Joined: 07 May 2008 Posts: 23 Location: Bangalore

I am still look for the assembler code to be doing th edynamic allocation. Does anyone have a code examples?

Pankaj Gupta · New User Joined: 07 May 2008 Posts: 23 Location: Bangalore

So is anyone having a reply with the examples?
Thank you very much for your informations.

Bill Dennis · Posted: Wed Oct 08, 2008 9:07 pm Post subject:

The manual in the first link given above has a section with sample Assembler code (Figure 70) as well as descriptions of the parameters and error codes.

Pankaj Gupta · New User Joined: 07 May 2008 Posts: 23 Location: Bangalore

Thank you... but I cannot be seeing figure 70 anywhere

Bill Dennis · Posted: Thu Oct 09, 2008 2:26 am Post subject:

Expand the Chapter "Requesting Dynamic Allocation Functions", you'll see "Example of a Dynamic Allocation Request" listed as a sub-topic.

Pankaj Gupta · New User Joined: 07 May 2008 Posts: 23 Location: Bangalore

Thank you for your help. i have now found the example and have tried it exactly as it is being written.

It gives a return code of 3952 which I cannot find being mentioned. Does anyone know if the code is being accurate?

Pankaj Gupta · New User Joined: 07 May 2008 Posts: 23 Location: Bangalore

Ok, so now I have go this example to seem to work. the return code is being 0.

But this allocates a dataset and gets the DD name from somewhere. but what is this meaning? I want to allocate a dataset to a ddname in my program so that then I can be opening and writing to the ddname. If only they were providing an example of this. it is seeming that so far they have only told half of the story book.

dick scherrer · Posted: Thu Oct 09, 2008 11:14 pm Post subject:

Hello,

Pankaj Gupta · New User Joined: 07 May 2008 Posts: 23 Location: Bangalore

According to the documentations and comments in the code, this code IS retriving the DD name. The DD name it is NOT being specified anywheres in the code.
This is not making much sense to me but that is what it is saying.

Robert Sample · Posted: Fri Oct 10, 2008 4:55 pm Post subject:

Is the DD name SYSnnnnn ?

Pankaj Gupta · New User Joined: 07 May 2008 Posts: 23 Location: Bangalore

What are you meaning? I am providing no DD name because the cod eis being for returning a DD name. There is being no DD name returnd, and why should there? i need the program to be providing a DD name for the file to be allocated to. that is being the whole point of the dynamic allocation.