[OmniOS-discuss] Active-Active vSphere

[Saso Kiselkov]

On 11/27/14 3:35 PM, Rune Tipsmark wrote:
> Hi guys,
> 
> Does anyone know if Active/Active and Round Robin is supported from
> vSphere towards OmniOS ZFS on Fiber Channel?

The short answer is: yes, but you wouldn't want to employ Round-Robin on
it. A ZFS pool can only be imported on a single node, never
simultaneously on two or more. However, using ALUA it's possible to make
the LUs on it visible from two OmniOS nodes - this is NOT round robin,
though. The initiator will see two paths to the LU, but only one should
be active at any one time (the one that has the pool holding the LU
imported). Access to the LU over the secondary target will be possible,
but slow. Upon failover, the secondary would grab the pool and become
the preferred ALUA path, so it all works out OK. Google "ALUA" for more
on the theory behind it.

It is a complicated to set up, though, so be aware of that.

Cheers,
-- 
Saso