Optimized for Virtualization
Using multi-port cards in virtualized environments critical to the application in order to provide redundancy and data connectivity for the workloads in the virtual machines. Due to specific slot limitations and the need for redundancy/data connectivity, it is usually recommended virtualized servers use at least six Gigabit ports to satisfy the I/O demands.
Virtual Machine Device Queues
(VMware Direct Path)
VMware Direct Path (SR-IOV) reduces I/O overhead on the hypervisor in a virtualized server by performing data sorting and uniting it in the network silicon (this feature requires an O/S that supports VMDq). This technology makes use of multiple queues in the network controller. As data packets enter the card, they are sorted, and packets traveling to the same destination/ virtual machine get grouped together in a single queue. The packets are sent to the hypervisor, which directs them to their respective virtual machines. Taking the strain of packet filtering and sorting from the hypervisor improves overall CPU usage and throughput.