Date: Fri, 20 Apr 2007 18:33:47 -0400
Reply-To: Gerhard Hellriegel <gerhard.hellriegel@T-ONLINE.DE>
Sender: "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From: Gerhard Hellriegel <gerhard.hellriegel@T-ONLINE.DE>
Subject: Re: zOS what is the max space available for a SAS library?
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Ok, this is the important information for me: there is no standard way to
tell me, what I can get. Not the storage group volume, so what I could
allocate, but what I actually have told the system I "want" to have (the
actual UNIT= and SPACE= parameters).
I just have decided, if there is no "automatism", to make a list of the few
jobs, which are relevant to watch at (the others are quite "normal") and
simply note the actual parameters. The rest (actual used, allocated, ...) I
can get from PROC CONTENTS.
So thanks for that expert view!
(by the way: it's Erkki Korhonen, who has that questions actually!)
On Wed, 18 Apr 2007 11:03:04 +0200, Robert Bardos <bardos2@ANSYS.CH> wrote:
>neither of IDCAMS's commands LISTCAT or DCOLLECT respectively
>provide a good enough answer. So some basics first:
>A multivolume SAS library can extend to a maximum of 59 volumes.
>On each of these volumes it can occupy a maximum of 65535 tracks
>This would mean some 3.8 million tracks. Or given a blocksize of
>27648 a total of
>Practical limits are usually encountered earlier. And there is
>quite an amount of dependencies. Questions like: how many volumes
>belong to the storage class? With how many candidate volumes has
>the library been defined? To what degree are the volumes in that
>storage class filled? ...
>Storage use tends to be dynamic, so an answer which was valid a
>few minutes ago may be 'cold coffee' (as a German saying goes) by
>now. Sadly there doesn't seem to be a standard batch method that
>would display exactly the same information as can be obtained
>through ISPF 3.4 (aka DSLIST).
>Third party tools like e.g. FDREPORT or CA-DISK [*1] may give a
>better answer. So my best suggestion is to contact your local
>storage admin group and ask them for a dedicated report.
>Well ... thinking of DCOLLECT again (had begun composing this post
>the day before) you might come up with a pretty slick solution.
>But this would involve some pretty heavy programming. (Idea here:
>determine storage class, determine number of volumes in storage
>class, determine free space in storage class, determine actual
>dataset size and number of volumes/units used vs. number of
>volumes/units definded etc. etc.)
>Ansys AG, Zurich, Switzerland
>[*1] a sample report step using CA-DISK could look like this
>//STEP010 EXEC DMS <-- DMS or whatever your sysprogs named it
>//SYSIN DD *
> SCAN CATALOGS=<your_catalog>
> SELECT DSN=(<hlq>.MICS.*.DAYS,
> REPORT MVD
>//* Hint based on experience: SCAN CATALOGS is significantly
>//* faster than SCAN REALVOLS
>> -----Urspr�ngliche Nachricht-----
>> Von: SAS(r) Discussion
>> [mailto:SAS-L@LISTSERV.UGA.EDU]Im Auftrag von
>> Gerhard Hellriegel
>> Gesendet: Dienstag, 17. April 2007 11:44
>> An: SAS-L@LISTSERV.UGA.EDU
>> Betreff: zOS what is the max space available for a SAS library?
>> Hi all your zOS freaks,
>> maybe someone has a idea: we have very big SAS
>> libraries with multi-volume and many extents.
>> The data-volume is growing inside that library.
>> We need to know, when we are close to a limit,
>> means, how high is the space limit for a specific library.
>> PROC CONTENTS returns only the current formatted blocks,
>> which is not the space, zOS can allocate for that library.
>> Maybe the FCB for the file can give us that information.
>> Means: I would know the extents, which can be allocated and
>> their max size. I know, that this is only half of the truth,
>> because the space might not be available anyway, but better
>> that knowing nothing. Does anyone know, how to get this?
>> If it is not possible in SAS, maybe someone knows if
>> that is provided by DCOLLECT?
>> Please share your experience!
>> Thanks for your input!