On 11/17/2012 10:40 PM, John R Pierce wrote: > On 11/17/12 6:58 PM, Steven Crothers wrote: >> On Sat, Nov 17, 2012 at 6:23 PM, Digimer<lists at alteeve.ca> wrote: >> >>>> You could take two nodes, setup DRBD to replicate the data >>>> (synchronously), manage a floating/virtual IP in pacemaker or rgmanager >>>> and export the DRBD storage as an iSCSI LUN using tgtd. Then you can >>>> migrate to the backup node, take down the primary node for maintenance >>>> and restore with minimal/no downtime. Run this over mode=1 bonding with >>>> each leg on two different switches and you get network HA as well. >>>> >> There is nothing active/active about DRBD though, it also doesn't solve the >> problem of trying to utilize two heads. >> >> It's just failover. Nothing more. >> >> I'm looking for an active/active failover scenario, to utilize the multiple >> physical paths for additional throughput and bandwidth. Yes, I know I can >> add more nics. More nics doesn't provide failover of the physical node > > > any sort of active-active storage system has difficult issues with > concurrent operations ... Exactly what is discussed here, as linked in my other reply; http://fghaas.wordpress.com/2011/11/29/dual-primary-drbd-iscsi-and-multipath-dont-do-that/ -- Digimer Papers and Projects: https://alteeve.ca/w/ What if the cure for cancer is trapped in the mind of a person without access to education?