ESXi Advanced Settings for NetApp NFS

Here are NetApp 
Net.TcpipHeapSize=30
Net.TcpipHeapMax=120
NFS.MaxVolumes=64
NFS.HeartbeatMaxFailures=10
NFS.HeartbeatFrequency=12
NFS.HeartbeatTimeout=5

Enabled SIOC or if you don't have Entrprise+ license set NFS.MaxQueueDepth=64, 32 or 16 based on storage workload and utilization

NetApp multitenancy

NetApp’s MultiStore functionality allows storage partitioning for multiple tenants.

It supporst up to 130 vFiler instances (128 vFilers plus 2 vFiler0 instances) but only for NFS, CIFS, iSCSI, HTTP, and NDMP. Fibre Channel is not supported. You can only use Fibre Channel with vFiler0.

More info:
http://blog.scottlowe.org/2009/04/08/3010-a-multistore-primer/