BTRFS on servers (was Re: Plans for BTRFS in Fedora)

Jonathan Dieter jdieter at
Wed Feb 23 19:42:59 UTC 2011

On Wed, 2011-02-23 at 14:18 -0500, Josef Bacik wrote:
> On Wed, Feb 23, 2011 at 2:00 PM, Jonathan Dieter <jdieter at> wrote:
> > On Wed, 2011-02-23 at 16:19 +0100, Dennis Jacobfeuerborn wrote:
> >> I'm actually quite interested in btrfs especially for servers because
> >> of it's features
> >
> > For what it's worth, we've been running btrfs on our school fileservers
> > since September.  After a few teething problems (fixed by
> > increasing /proc/sys/vm/min_free_kbytes), we've had pretty much zero
> > trouble.
> >
> Wait what?  I know we use lots o ram, but you shouldn't have to bump
> min_free_kbytes.  What were you seeing?  Thanks,

Sorry, I didn't mean to imply it was btrfs that was causing the problem.
We got new servers when we did our upgrade and ran into problems with
the e1000e kernel module being unable to allocate memory even though
there was loads free.  Bumping up min_free_kbytes fixed it.

See for more detail.

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