[Novalug] GFS?

[Brian Steisslinger]

mirroring across the wan is bad!

You need a file level replication solutin.
What is yous link speed and latency? Do you synchrnous or asynchronous
replication. Rsync may work, do both sides need to process data
simultaneously or are you doing this DR/Coop?

On 5/2/07, John Franklin <franklin at elfie.org> wrote:
> On Wed, 2007-05-02 at 16:13 -0400, Nick Danger wrote:
>
> > I think I misunderstood the purpose of GFS :-) What Im looking for is
> > to have two geographically separated NAS units. NAS units are cheap in
> > single form, 3 terrabytes for less then 10grand.  The question is, how
> > can I mirror the two file systems for failover? I know how to do it at
> > the application/network level, just not at the data/FS level.  I kept
> > thinking GFS but that seems more like making lots of disks appear as
> > one, not for mirroring. Unless Im reading it wrong.
> >
> > So, pointers? Links? Case studies? I'll summarize what I find and send
> > it back out to the list.
> >
>
>
> If the NAS boxes support iSCSI, you can set up a software RAID1 with
> them.  Make NAS1 and NAS2 two iSCSI targets that map to /dev/sda
> and /dev/sdb, then use md.conf to connect them. That said, I have no
> idea how fault-tolerant software RAID is, nor how much the lag between
> the two would affect performance on a day-to-day basis.
>
> jf
> --
> John Franklin <franklin at elfie.org>
>