3–Fibre Channel Configuration
Configuring Virtual Ports (NPIV)
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Configuring NPIV Quality of Service
The QLogic 2700 Series Adapters solution provides for standards-based quality of
service (QoS), ensuring high-quality performance for applications that require
preferential delivery. The QLogic QoS solution is based on assigning QoS levels
to virtual ports (NPIV ports). You can configure the QoS using the
priority
method
or the
bandwidth method
, as shown in
Figure 3-7. Priority and Bandwidth-Based QoS
On a single physical port, you can configure QoS using the priority method or the
bandwidth method, but not both.
The
priority method
assigns priority levels (low, medium, or high) to virtual
ports based on the quality of service required for the applications or VMs
using the virtual port. This method provides for various levels of latency
requirements across virtual ports.
The
bandwidth method
assigns a bandwidth percentage (0–100) or a
bandwidth rate (for example, 6Gbps) to applications or VMs that are using a
virtual port. This method provides a minimum bandwidth guarantee. The
bandwidth-based QoS configuration applies only when the total bandwidth
requirement of the applications exceeds the available bandwidth. The
bandwidth is not reserved for a specific virtual port, and unused bandwidth is
shared among the other virtual ports.
