[linux-lvm] About fstab and fsck

[David Robinson]

On Wed, Feb 11, 2009 at 10:03 PM, Chris Cox <chris_cox at stercomm.com> wrote:
> On Wed, 2009-02-11 at 21:58 +0000, David Robinson wrote:
> ...
>> Usually you'd want to have fsck enabled for your root filesystem, but
>> by the looks of it the LV and filesystem you grew _is_ your root
>> filesystem... so considering its size, I'd turn it off. Hopefully the
>> "fsck takes _forever_" problem will die when btrfs becomes the
>> standard filesystem.
>
> I'm not aware of any feature in btrfs that will prevent
> the fsck time issue on very large fs's.
>
> Until something fairly radical happens in fs design, I'd avoid
> very large fs's.

btrfs isn't a radically different design? Perhaps I should have
rephrased what I said - rather than btrfs being quicker at checking
and repairing the filesystem (ala fsck) it (in theory) prevents you
from ever needing to fsck in the first place. It basically trusts
nothing and checksums everything. A quick look at the features page
[1] lists:

- Checksums on data and metadata (multiple algorithms available)
- Online filesystem check
- Very fast offline filesystem check

[1] http://btrfs.wiki.kernel.org/index.php/Main_Page

--Dave