[SLE] Large Block Device Support [WAS: Largefile support on SUSE]
From: Greg Freemyer (freemyer-ml_at_NorcrossGroup.com)
Date: 10/30/03
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To: suse-linux-e@suse.com Date: 29 Oct 2003 19:18:55 -0500
If anyone cares besides me, I found these limits with x86:
Vanilla 2.4.20 kernel
2 TB
With LBD kernel patch --
Effectively None. ie. Multiple PBs or bigger
Vanilla 2.6.0 kernel with LBD_CONFIG off
2 TB
With LBD_CONFIG ON --
Effectively None. ie. Multiple PBs or bigger
XFS --
Effectively None. ie. Multiple PBs or bigger
DM --
2 TB even in 2.6 (not sure about this)
LVM --
1 PB, but you requires large extents
NFS --
No restriction
Samba --
No restriction.
Also, the actual hardware driver (SCSI, etc.) can limit to 2 TB, or even
1 TB.
Greg
On Fri, 2003-10-17 at 17:07, Greg Freemyer wrote:
> SuSE 9.0 (2.4 kernel):
> XFS -- 2 TB (I assume)
> XFS w/LBD patch -- greater than 2 TB (I assume)
> XFS w/LBD patch on top of MD -- ??
> XFS w/LBD patch on top of LVM -- 1 PB
> XFS w/LBD patch on top of DM (w/DM patch) -- ??
> NFS exported XFS -- ??
> Samba exported XFS -- ??
>
> SuSE 9.0 (2.6 test kernel (includes LBD patch)):
> XFS -- ??
> XFS on top of MD -- ??
> XFS on top of DM (assuming DM kernel patches installed) -- ??
> NFS exported XFS -- ??
> Samba exported XFS -- ??
>
> Thanks
> Greg
> --
> Greg Freemyer
>
>
> On Fri, 2003-10-17 at 10:20, Tony Vickers wrote:
> > For Large file systems use XFS from SGI. I have files that are 65 Gig in
> > size.
> >
> > --Tony
> >
> > On Fri, 2003-10-17 at 02:41, Nick Katsamas wrote:
> > > Hi,
> > >
> > > I have Suse 7.3 with kernel 2.4.19 compiled by my own, and
> > > i want to create a 5GB file.
> > >
> > > I use the command:
> > >
> > > dd if=/dev/zero of=largefile bs=1024k count=5120
> > >
> > > and this is the answer that i get:
> > >
> > > dd: writing `largefile': File too large
> > > 2049+0 records in
> > > 2048+0 records out
> > >
> > > ls -h
> > >
> > > 2.0G largefile
> > >
> > > I try as root and as normal user.
> > >
> > > How can i create this file under Linux?
> > >
> > > --
> > > Best regards
> > > ****************************
> > > Nick Katsamas
> > > e-Mail: nkat@forthnet.gr
> > > ****************************
> > --
> >
> >
> > --Tony
> >
> > Tony Vickers 866-585-1771 Office
> > Chief Technology Officer 619-934-5276 Fax
> > I.D.L. Technology Group, Inc. 619-672-1027 Cell
> > http://www.idltechnology.com
> >
> > "Solutions and Services that Fit."
> >
> > This message was sent using SuSE Linux Openexchange. See how Openexchange
> > can change the way you think about doing business. http://www.idltechnology.com
>
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