[EMAIL PROTECTED] wrote on 01/26/2007 12:20:17 PM:
> [EMAIL PROTECTED] wrote:
> *snip*
> IMO, the quota-per-file-system approach seems inconvenient when you get
> past a handful of file systems. Unless I'm really missing something, it
> just seems like a nightmare to have to deal with such a ridiculous
> number of file systems.
>
>
> Why? What additional per-filesystem overhead from a maintenance
perspective
> are you seeing?
>
> Casper
>
> The obvious example would be /var/mail . UFS quotas are easy. Doing
> the same thing with ZFS would be (I think) impossible. You would
> have to completely convert and existing system to a maildir or home
> directory mail storage setup.
>
> Other file-system-specific software could also have issues.
> Networker for instance does backups per filesystem. In that
> situation I could then possibly have ~3000 backup sets DAILY for a
> single machine (worst case, that each file system has changes).
> Granted, that may not be better or worse, just 'different' and not
> what I'm used to. On the other hand, I could certainly see where
> that could add a ton of overhead to backup processing.
>
> Don't get me wrong, zfs quotas are a good thing, and could certainly
> be useful in many situations. I just don't think I agree that they
> are a one to one replacement for ufs quotas in terms of usability in
> all situations.
Yes, there is an RFE out there for this that has been "dispatched"?. In
many cases the zfs quotas work very well and are actually a godsend (after
getting over the initial shock of seeing screens of df output) but they
fail to cover usage when a filesystem or directory tree must be shared by
multiple users where each users needs to have limits to what disk space
they may use -- think department folders, or your example of mail. The RFE
does not go into details about HOW this would be done when implemented.
User level quotas don't need to exactly match ufs quotas -- they can be
rethunk for zfs. Are zfs style user quotas:
per zfs fs?
per zfs fs and all of their children (recursive)?
affected by snapshots data usage?
applied to lists of fs and summed (
username:100,000:/tank/home/username;/tank/departments/usersdepartment #
allow 100,000 bytes to be used in total between these two unrelated
filesystems by this user)...
I have faith that user quotas are going to come sometime, these how
questions are interesting to me...
-Wade Stuart
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