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Re: fs-independent quotas
On Thu, Oct 20, 2011 at 03:16:09PM +0000, David Holland wrote:
> On Thu, Oct 20, 2011 at 11:57:04AM +0200, Ignatios Souvatzis wrote:
> > > support to other filesystems (tempfs, perhaps v7fs) or even add other
> > > filesystems that have or may have their own native quota handling
> > > (zfs, Hammer, you name it).
> > zfs - does it really have quota?
> I don't know... but if not, there are plenty of other fses.
> > All the demos I've seen talk about sub-filesystem limits; you create
> > per-user sub-filesystems if you want to emulate per-user quota.
> > (Correct me if I'm wrong.)
> > How would this fit in, if at all?
> That's a good question. My first instinct is that like the other stuff
> zfs does that it does in its own semantically-incompatible way, it
> would require its own tools. But I guess the quota system could be
> made to report the limits if the sub-filesystems are specifically
> assigned to users somehow. Or something like that...
The problem is that sub-file-system per user, or one per workgroup and
one subsubfs per user, are only special cases of what you can do. It's
really a filesystem, mounted at some point in the tree, and can be used
to limit finer-grained than what you can express with user and group
quota, although it can emulate their functionality.
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