Re: Re: Compile and run later

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On my way to trying this I went to add another program to my linklib, 
but I got a SD37 abend - looks like I am out of disk space?
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Not necessarily. You've filled the PDS to where it needs another extent 
and it's not available. Either your secondary allocation was zero or 
you've already got 16 extents. All the example allocations via JCL that 
I've seen here have specified no secondary extents, so that's probably 
your problem. Send me, privately, the dsname and volser involved and 
I'll send you a deck to affect repairs. Also send the device type and 
I'll show you the optimal blksize for LMODs on that device type. In 
general, the optimal blksize for LMOD datasets is a full track, or 
32,760, whichever is smaller.

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How do I check my disk space?
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On the CBTTAPE web site, locate a program called LSPACE, download and 
assemble it. I'd suggest you link it into your SYS1.LINKLIB dataset, 
then issue the console command "F LLA,REFRESH". The comments in the code 
will tell you how to use it and how to interpret the results.

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If my disk space is low what can I do to fix that (btw I compressed all 
my PDSs) 
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Let's not cross that bridge just yet. I'm sure you still have lots of 
space; it's just a question of understanding usage.

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Is plain vanilla MVS38J  really low on available disk space? (Do I need 
to 'buy' some more DASDs?)
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MVS can use huge amounts of disk space, up to 256 devices on each 
channel. Your configuration may need adjustment but let's try to learn 
the basics of space management before we go "buying" DASD.

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Is my linklib somehow confined to a single volume?
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All Partitioned Datasets (DSORG=PO) are limited to a single volume. That 
restriction has existed since PDS's were first introduced and still 
exists today under z/OS.

Unlike Windoze and UNIX/LINUX, MVS requires that you estimate the space 
requirements before creating a dataset and you'll be held to those 
limits. I typically allocate 25 cylinders for the primary and 10 
cylinders for the secondary space for a private linklib. I compute the 
number of directory blocks such that they take a integral number of 
tracks. BLKSIZE is as described above, LRECL is not specified and RECFM 
is always U.

If there's enough interest, I'll make some excerpts from some manuals 
and pass them to somebody here to add to the files section of this list. 
They might be helpful in dealing with some of these "housekeeping" 
issues and save some headaches.

Rick