On Wed, Feb 24, 2016 at 06:25:43PM +0800, Hannes Reinecke wrote: > On 02/24/2016 01:00 PM, Andy Grover wrote: > > On 02/01/2016 11:07 PM, Avishay Traeger wrote: > >> Hi all, > >> I have a system where various configurations are possible - iSCSI/FC, > >> single paths and multiple. For multiple I of course use device-mapper. > >> I was wondering if it was possible to: > >> 1. use it for cases where I have a single path. > >> 2. create a monitoring process that can take some action (e.g., send a > >> notification via message queue) in the case of some failure that would > >> normally cause failover. > > > > Does dm-multipath support a single path? I don't know... > > > Pshaw. > Of course it does. > > (Might be that RH has some magic disallowing that, but certainly there's > nothing in the source which forbids it. In fact I recommend it when > using iSCSI) No but find_multipaths is enabled by default so maps are only created automatically when we see at least two devices with the same WWID. > So I recommend to always use dm-multipath and listen to uevents. Ack. Regards, Bryn. -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
