Date: Tue, 12 Nov 1996 01:33:53 EST
Reply-To: Clarence Wm Jackson <73021.3404@COMPUSERVE.COM>
Sender: "SAS(r) Discussion" <SAS-L@UGA.CC.UGA.EDU>
From: Clarence Wm Jackson <73021.3404@COMPUSERVE.COM>
Subject: Re: DISP=SHR
Hi Anthony,
you may have read this either in a Ver 5.xx manual, or in the MVS
companion for either version. If you want to drop the overhead of
the file, don't use JCL DD, use the FILENAME statement inside your
SAS code instead. This will allow you to use the file in another
job when the "FILENAME fileref CLEAR;" statement is issued. JCL,
although you would think it will allow multiple access using "SHR",
MVS holds all DD's until the JOB completes in most cases, even in
COBOL and ALC programs.
--------------- in response to your post -----------
Date: Sun, 10 Nov 1996 16:14:15 GMT
From: Anthony Ayiomamitis <ayiomami@INTERLOG.COM>
Subject: DISP=SHR
Folks,
I read somewhere that DISP=SHR is not what it seems and can
indeed lock up a library. Unfortunately I cannot recall where I saw
that posting. I also managed to recreate the problem myself about two
years ago but I cannot recall how I did it (damn it!).
I spoke to SAS Tech Support a while back and they did confirm
that SAS does open up a library in EXCLUSIVE mode in spite of the
DISP=SHR option and this was because of some SAS quirk behind the
scenes.
Does anyone have any example(s) of the above being accomplished
and/or any reference to printed material for the same?
WIth flat files, I have easily modified a file using a data
step even though the JCL had a DISP=SHR option. I an now trying to
recreate the same problem with a SAS library. As noted above, I have
done it before but cannot recollect how I pulled it off.
Due to a business trip lasting twelve days, I will not be able
to reply immediately to any questions or comments.
Many thanks in advance for any help/assistance!
Anthony.
--------------- thank you -----------
Clarence Wm. Jackson
email: 73021.3404@compuserve.com
homepage: http://ourworld.compuserve.com/homepages/CJac
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