Thoughts on Quotas
mneumann at ntecs.de
Sun Sep 26 05:37:17 PDT 2010
What do people think about qutoas in general? Are they really useful? I
know there is a GSoC proposal for a generic quota API, but would that be
really useful for HAMMER with it's fine grained snapshots? I mean, would
the historical data be accounted for that user as well or not?
And then, I don't think quotas would be widely used on anything other
than a HAMMER filesystem, so that I would not mind to see a HAMMER-only
My usage scenario is a Fileserver with many users. One thing that comes
to mind is to spend one PFS per user home directory. IIRC, HAMMER
supports up to 2^16 PFS. In my case it is obvious that limiting the real
diskspace used by each PFS would be a nice feature, not only in my case,
but also imagine one PFS per vkernel or jail, which would give much
stronger separation guaratees than what we have right now.
I am probably putting this question towards Matt because he knows best
about HAMMER... so how hard would it be to implement (soft) PFS disk
space tracking and limitation?
More information about the Kernel