Re: [Iscsitarget-devel] iscsitarget sync problem

[Pasi K. <pa...@ik...>]

On Fri, Jul 10, 2009 at 05:06:30PM +0100, Maverick wrote:
> 
> Ok, i see, my FS is ext3.
> 
> In this case i was making alterations directly on the disks that where
> mounted directly on the machine and shared via iscsi to the second machine.
> 
> But you'r saying that even if I have 2 machines that connect via iscsi to my
> iscsi-target, and I make an alteration in one file, the other machine that
> is connected also via iscsi wont see the changes?
> 

You can't do this with ext3. 
Use NFS, not iSCSI, if you want to share ext3 like that.

Or then use clustered filesystem on top of iSCSI.. gfs, gfs2, ocfs, etc.

iSCSI is not NAS, it's a SAN solution for sharing _block_ devices.

-- Pasi

> 
> -----Original Message-----
> From: George Negoita [mailto:neg...@gm...] 
> Sent: domingo, 17 de Maio de 2009 22:25
> To: isc...@li...
> Subject: Re: [Iscsitarget-devel] iscsitarget sync problem
> 
> Hello!
> 
> On Sun, May 17, 2009 at 11:10 PM, Maverick <mav...@gm...> wrote:
> > On a second machine i've configured iscsi tools , everything seems to be
> ok,
> > the shared disks show up on my second machine,
> >
> > the problem is, when I make any alteration on the shared disks on the
> first
> > machine, directly to the disk, like create a new file, etc..
> >
> > the second machine doesn't see this alterations L is this normal?
> 
> Are you using a cluster-aware filesystem (ocfs2, gfs(2), etc.)? If
> not, you cannot mount the exported disks on more than one machine at a
> time, because a non-cluster filesystem (ext2/3/4, xfs, etc.) will not
> be aware of the changes made by another node on the underlying device.
> 
> -- 
> George Negoita
> System Administrator
> iMedia Plus Group
>