[CentOS] centos6 filesystem size limit

Mon Jan 3 12:20:38 UTC 2011
Pasi Kärkkäinen <pasik at iki.fi>

On Sun, Jan 02, 2011 at 04:49:44PM -0500, Joshua Baker-LePain wrote:
> On Sun, 2 Jan 2011 at 1:45pm, Robert Arkiletian wrote
> > I just read the rhel6 filesystem size limit.
> >
> > http://www.redhat.com/rhel/compare/
> >
> > It says 16TB limit for ext4 (same as ext3)?!?!  I thought ext4 was
> > supposed to support 1EB ( ~ 1 million TB) limit. That was one of the
> > main advantages of rhel6. After a little more digging all I found was
> > that the user space formatting tools (mkfs.ext4) only support 32bit
> > filesystems (not 48bits). I'm surprised about this, I thought people
> > would be waiting for >16TB support in rhel6. Does anyone know if this
> > is going to change in point releases of rhel/centos6?
> I did some googling on this recently, and I found that while ext4 
> theoretically supports such large filesystems (and you can find/compile 
> userspace tools to create them), the developers don't really recommend 
> using it for such yet.  It's just not deemed ready for production yet.  I 
> saw multiple recommendation (including from RH devs) to use XFS if you 
> need filesystems that big.

I think there's a problem at least in mkfs.ext4 etc, they're not
able to handle >16TB filesystems yet.

-- Pasi