On 11/21/2011 12:20 PM, Arne Jansen wrote:
On 11/21/2011 05:06 PM, Phillip Susi wrote:
On 7/10/2011 4:21 AM, Arne Jansen wrote:
btrfs qgroup limit [--exclusive]<size>|none<qgroupid> <path>
btrfs qgroup limit 10g /usr
That should be simple enough for the common use case.
Wouldn't that make the syntax above actually be:
btrfs qgroup limit [--exclusive]<size|none> [qgroupid]<path>
You don't mean to actually changing the syntax, but adding a better
explanation or a more precise usage?
What I mean is that your syntax listed <groupid> in angle brackets,
indicating that it is a required argument, but your description seems to
indicate that it is optional, so it should be in square brackets. Also
the size bit I assume was meant to be a required parameter that should
be either a number or the word none, so the angle brackets should
enclose the |none part too.
I also have a question about the interactions with groups of groups. Say
I have 4 subvolumes: 1, 2, 3, and Z. I group the first 3 volumes and
set a limit on them. Now if all 3 volumes share a chunk of space, that
space should only count towards the group once, rather than 3 times.
It's just what groups are made for. In your scenario the chunk of space
would count only once. Some hopefully better explanation can be found at
Ohh, so the group is a union of the chunks in the members, not a sum?
So if you set an exclusive limit on the group, that would count
everything shared between 1, 2, 3 once, and not count any shared with Z?
In other words, --exclusive excludes space shared with things outside
the group, not within it?
http://sensille.com/qgroups.pdf
Have you already played with the patchset?
Not yet; I just found it today from the new thread on the subject, and
look forward to playing with it tonight. I was wondering what revision
the patches are based on, and are they in a public git repo?
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