iSCSI, twin-tailed disk, cheap-cheap fibre channel, ???

[Joseph Kubik]

The high end SANs provide for clustering. One LUN will be made
accessible to multiple hosts (who have to handle their own atomic
writes).

If anyone knows more about the NBD stuff I'm interested.
-Joseph-

On 1/22/06, William Park <opengeometry-FFYn/CNdgSA at public.gmane.org> wrote:
> On Sat, Jan 21, 2006 at 10:57:40PM -0500, Fraser Campbell wrote:
> > William Park wrote:
> >
> > >>More useful?  They are essential, my shared disk (SAN or not) is useless
> > >>without them.
> > >
> > >
> > >How is SAN different from just a file server?
> >
> > Main difference is how a client system accesses the disks
> >
> > * a file server serves filesystems over the network, typically using NFS
> >   or SMB protocol
> > * a SAN serves block devices, typically over fibre channel
> >
> > A client system mounting SAN disks can partition up those disks and
> > format them however it sees fit, just like local disks effectively.
>
> - Is that what Network Block Devices supposed to do?
> - Looking at kernel options, I also see 'ATA over Ethernet' option
>   Not sure how you would use them, though.
>
> >
> > The advantage of SANs are mostly from a data management perspective
> > (backup, failover, redundancy, etc.).
>
> --
> William Park <opengeometry-FFYn/CNdgSA at public.gmane.org>, Toronto, Canada
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