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, Digimerlists@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...