RE: Is there a grand plan for FC failover?

James Bottomley
2004-01-28T22:17:22Z

On Wed, 2004-01-28 at 16:02, Smart, James wrote:
> I'd add one additional issue :
>
> 3) SCSI Reservations
>
> I guess this could be considered a part of (2), but given that reservations
> bring in a host of additional problems, and potentially brings up multi-host
> configs/clusters as well...

The current crop of cluster implementations that use reservations manage
quite well in user space alone. Certainly, though, the presence of
reservations can interfere with failover code and may be considered a
problem that needs to be solved in multi-path...it all depends on how
the multi-path devices react to path switching in the face of
reservations.

I'm open to suggestions on this, but I think it should be done
separately as part of a device ownership API.

James