On Tue, 27 Nov 2012 17:12:01 -0800, Edward Jaffe wrote:
>
>I have heard of filesystems that implement space quotas.
>
That's per user, of course. But MVS grew out of OS/360, which had
little concept of resource ownership, and has not well matured beyond
that. For example, if I own a data set, I ought to be able to delete or
rename it, even if the consequence is preempting other users who may
happen to have it allocated.
But user quotas is a much less cumbersome scheme than requiring a
user to specify SPACE= on each individual data set. Given the essential
corollary of effective reporting ("How close am I to exceeding quota,
and what data sets are the major offenders?") z/OS Unix System
services (USS) does pretty well here, by giving each user a zFS partition
and letting that user subdivide it as desired. du(1) is a reasonably
effective reporting tool.
-- gil
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