NOTE:
The QoS levels described in this section apply only to SAN and FCoE traffic. These QoS levels do not affect Ethernet traffic QoS levels and NIC traffic bounds.
To modify QoS levels, the configuration must meet the following hardware and software requirements:
Server operating system: Microsoft Windows 2008
Server support for message signaled
A QLogic 8100 Series Adapter
QLogic STOR Miniport Driver 9.1.8.15 or later
Setting QoS by Bandwidth
Setting the QoS by bandwidth allocates up to 80 percent of the physical port's bandwidth to its virtual ports. For the 10Gbps 8100 Series Adapter, this value is 8Gb. The remaining 20 percent (or 2Gb) is reserved to handle
Setting QoS by bandwidth guarantees bandwidth for each virtual port and to the application or virtual machine associated with that virtual port. The proper QoS setting can prevent bottlenecks that occur when VMs contend for port bandwidth.
Consider how bandwidth is required to maximize application or virtual machine performance, and set the QoS level to 105 percent of that value. For example, if a
Alternatively, the virtual port QoS values can be set as a percentage of the total available bandwidth.
NOTE:
Setting QoS by bandwidth guarantees a minimum bandwidth to a virtual port but not a maximum limit. If the application/virtual port requires more bandwidth than the QoS bandwidth value allows, and the physical port has available bandwidth, the application will receive the additional bandwidth. The port allocates additional bandwidth on demand up to the port capacity or until there is contention for bandwidth among the virtual ports.
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