On Thursday 18 February 2010, Chris Mason wrote:
> On Thu, Feb 18, 2010 at 12:46:56PM -0800, Mike Fedyk wrote:
> > On Thu, Feb 18, 2010 at 11:59 AM, Goffredo Baroncelli
> > <kreij...@gmail.com> wrote:
> > > On Thursday 18 February 2010, Chris Mason wrote:
> > >> I do like the subcommand method, more details below.
> > >>
> > >
> > > I try to summarise your suggestions. But there are some cases not to
clear for
> > > me.
> > > I grouped the commands in three categories: subvolume, devices, and
> > > filesystem.
> > >
> > >
> > > devices scan
> > > devices show
> > > devices balance
> > > devices add
> > > devices remove
> > >
> > > subvolume snapshot
> > > subvolume delete
> > > subvolume create
> > > [subvolume list]
> > >
> > > filesystem resize
> > > [filesystem label]
> > >
> > > ??? defrag
> > > ??? sync
> > >
> > >
> > >
> > > For the first two categories both Chris and Mike agreed; but IMHO there
are
> > > some commands that don't fit nor in devices, nor subvolume, like resize
(we
> > > resize a filesystem) and label (not available now).
> > >
> >
> > A btrfs filesystem can span multiple devices. Resize resizes how big
> > of a chunk of one device btrfs uses.
>
> Right, resize is actually always per device. When there is one device
> resizing the FS and the device are the same thing.
>
> > This would be used by
> > partitioning programs for instance. zfs uses the term "pool" instead
> > of filesystem to solve this ambiguous use of the term "filesystem"
> > since btrfs and zfs break people's existing definition of the word
> > "filesystem".
> >
> > > I don't know how classify defrag (per file / directory level ?) and sync
> > > (filesystem ?)
> >
> > It turns out that defrag is per file, which seems most cumbersome.
> > Maybe since it will probably eventually work against several types of
> > objects we could have:
> >
> > btrfs defrag file <file>
> > btrfs defrag directory <directory>
> > btrfs defrag subvol <subvol>
>
> I like these, although we don't currently support the directory/subvol
> side. But we can leave the option open to add these later.
Sorry, but why:
$ btrfs defrag subvol
and not
$ btrfs subvol defrag
What do you want:
$ btrfs <object> <action>
or
$ btrfs <action> <object>
--
gpg key@ keyserver.linux.it: Goffredo Baroncelli (ghigo) <kreij...@inwind.it>
Key fingerprint = 4769 7E51 5293 D36C 814E C054 BF04 F161 3DC5 0512
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