I know the z/OS USS can NFS mount LINUX Filesystem. Many years ago back I
converted a PL/I program from writing to dataset to filesystem(ext2).
I wrote a few functions that replace/substitute the OPEN, READ and WRITE in
the program.
-----Original Message-----
From: Linux on 390 Port [mailto:[email protected]] On Behalf Of RPN01
Sent: Wednesday, November 09, 2011 10:27 AM
To: [email protected]
Subject: Re: mvsdasd
Is there a reason that zOS NFS won't work? Then you'd have direct access to
the file, without copying via FTP or to z/VM, via a documented, supported
and auditable interface to zOS that is also documented and supported by
zLinux in the standard distribution. No odd files to build. No security or
audit holes to document. The glossy sheet is at
http://www-03.ibm.com/systems/z/os/zos/nfs/index.html
This is an interface that I'd easily be able to "sell" at my site. The
pieces are already all in place, as they're part of the standard operating
systems. There's network time involved, but there would be with any of the
solutions. There's no additional disk space involved as there would be with
an FTP store and forward type solution.
I think NFS would be a much cleaner solution to your problem than mvsdasd.
And, it has the advantage of being understandable by the person(s) who come
along after you who might have to support it or make changes to it.
--
Robert P. Nix Mayo Foundation .~.
RO-OC-1-18 200 First Street SW /V\
507-284-0844 Rochester, MN 55905 /( )\
----- ^^-^^
"In theory, theory and practice are the same, but
in practice, theory and practice are different."
On 11/9/11 8:59 AM, "Agblad Tore" <[email protected]> wrote:
> Ok, since I think I was the one starting this I think a clarification about
> the reason is in place :)
> The 'problem': We need to read huge amount of data using a program on zLinux,
> but it needs access to the files.
> We could use ftp, but due to the
> huge amount of data, most of the costsaving is eaten up by ftp-cpucycles in
> z/OS :(
> And it takes time.
>
> If we could access the actual disks or files directly from zLinux it would
> really cut the cost here.
>
> In that case it is some dedicated volumes, scheduled and documented z/OS jobs.
>
> And about the mvsdasd program, it works like this:
> At the outpointed dasd volume it search for a file with a specified name, it
> must be there and it is a z/OS std seq file.
> It is created in z/OS and protected by RACF/ACF2.
> That file should contain names of files on that volume that mvsdasd is allowed
> to read.
>
> I think this makes it secure and auditable enough.
>
> But I haven't had the spare time to have this one working yet.
> For the moment we test to copy files from z/OS to z/VM CMS-files (tracable and
> auditable) and then read it from zLinux.
>
> /Tore
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