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BP1024 Scaling and Best Practices for Virtual Workload Environments with the FS7500 15
Figure 8 Multiple datastore mounts to same NFS export via multiple NAS services IP addresses
We conducted sequential write I/O studies using Iometer from a single VM running on a single ESXi
host. The vSwitch was studied with the three different load balancing policies. A vmknic was
configured for mounting NFS exports as ESX datastores. For all of the load balancing algorithms, we
mounted the same NFS export from the FS7500 using four different NAS service IP addresses as four
different datastores. In all three cases we configured the vSwitch with 4 x 1GbE uplink NICs (vmnics).
The ports on the switch connected to these NICs were set to static LAG mode with ‘source and
destination IP hashing’ algorithm. The write throughput measured by Iometer was monitored and
analyzed.
The following figure shows the write throughput as measured from Iometer with different load
balancing techniques: