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Connecting Cinder node to EMC SAN


I have an install of Kilo running across a number of physical nodes: 1xController/Service node, 2xCompute, and 1x Block(Cinder).

At the moment I have 500gb disk on the Cinder node and I can create volumes and attach them to VMs etc.

I want to provision a number of TB from EMC SAN to Cinder. The EMC VNX Direct driver install: here actually connects the Compute hosts to the SAN with the Cinder node Optionally connecting to the SAN -so iSCSI traffic goes between SAN and Compute node. I see how this makes perfect sense - BUT:

I have limited NICs on the Compute hosts, and I'm wondering what would be the implications of just provisioning say 3TB of SAN disk to the Cinder node and having iSCSI traffic going between SAN to Cinder then Cinder to Compute?

Is this possible and would I run into problems this way?

thanks in advance.