VAM file

[Cousins, Michael]

PH opens MPE files with locking enabled. This may represent a conflict with
3GL's, depending on how you have configured the open for the file in the 3GL
program. Compatibility can be simply attained by including ;LOCK on a file
equation for the VAM file.

> ----------
> From: 	Michael C. Lee[SMTP:mclsys@home.com]
> Sent: 	Friday, September 18, 1998 6:12 PM
> To: 	Cummings, Ken P.
> Cc: 	'PowerHouse Discussion List'; Dulworth, Amanda L.
> Subject: 	Re: VAM file
> 
> We use mailbox files in our system and they are declared as follows:
> File CMBX_FILE
> &
>   Organization DIRECT
> &
>   open *CMBXFILE                               &
>   NOCREATE
> 
>   Record CMBX_FILE
> &
>     Description "    This file is used as a mailbox file for background
> jobs "
> &
>                 "It is a message flat file of the MPE file system which
> "
> &
>                 "remove the record entry once the record has been read.
> "
> 
> And the file is listed on the HP as follows:
> 
> FILENAME  CODE  ------------LOGICAL RECORD-----------  ----SPACE----
>                   SIZE  TYP        EOF      LIMIT R/B  SECTORS #X MX
> 
> CMBXFILE*          56B  VAM          1       1052   4      272  1  *
> 
> 
> Regards,
> 
> 
> Michael Lee
> MCL Systems Inc.
> 
> Cummings, Ken P. wrote:
> 
> > I am on an HP3000 running PH 7.29 under MPE/X.
> >
> > I have a VAM file (MPE "message" file) that I want to read from a QUIZ
> > program.  Currently, a COBOL program accesses this VAM file and prints
> order
> > acknowledgements. The VAM file is always being accessed by around 40
> > processes which write to it concurrently, and the COBOL background
> process
> > runs during the day printing order acknowledgement as they hit this
> file.
> > Because the file is a VAM file, as soon as the record is read by the
> COBOL
> > program, the record is automatically deleted from the file.
> >
> > I rewriting the COBOL Order Acknowledgement print program in QUIZ.  My
> > question is, can I define this VAM file in my PDL so that I can access
> it
> > from QUIZ directly?  If so, what ORGANIZATION and TYPE would I define it
> as?
> >
> > Thanks in advance.
> > Ken.
> >
> > ----------------------------------------------------------------------
> >           Ken Cummings
> >           Senior Consultant
> >           VersaComp Systems Inc.
> >           cummingsk@versacomp.com
> >           kpcummin@gapac.com
> >           404-652-6250
> >
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