[ovirt-users] Re: Recommendation for iSCSI configuration

Unless you have a some awesome storage packed with SSDs, it is very unlikely you will exceed 10Gb. For simplicity I would just use a 10Gb fail-over bonded configuration. If you can saturate a 10Gb link then it should be possible to do what you suggest. For starters, I suspect the VLAN configuration you are proposing wouldn't work. Yes, you would want two VLANs, but they would be: 192.168.11.0/28 192.168.11.16/28 You would want to give the storage an IP in each separate VLAN, and give each oVirt node an IP in each separate VLAN. So for example storage could be: 192.168.11.1/28 192.168.11.17/28 and node1 could be: 192.168.11.14/28 192.168.11.30/28 and node2 could be: 192.168.11.13/28 192.168.11.29/28 ...and so on. It wouldn't totally shock me if there was some storage solution that used custom load balancing that would work the way you suggest, but using separate sub-nets is probably the most standard. You can run into all sorts of ARP fun by putting two Linux interfaces on the same sub-net. On the storage side you would create an iSCSI portal on each of the two sub-nets. Make sure your initiator and target are all setup per the storage requirements. I've done it with 4x1Gb (and 4 VLANs) in FreeNAS; exact steps are storage brand specific. On the oVirt side you would have to configure multipath and dm for multipath. You should be able to google how to do that; steps would be generic for Linux. Once configured correctly you should get a dm with multiple connected paths.