About Data Traffic
Data traffic can be prioritized in distinct levels of service differentiation: low, medium, or high priority. You can apply QoS to ensure that Fibre Channel data traffic for your latency-sensitive applications receive higher priority over throughput-intensive applications such as data warehousing. With a deficit weighted round robin (DWRR) scheduler you can ensure that high priority traffic is treated better than low priority traffic. Online transaction processing (OLTP), which is a low volume, latency sensitive application, requires quick access to requested information. For example, DWRR weights of 70:20:10 implies that the high priority queue is serviced at 7 times the rate of the low priority queue. This guarantees lower delays and higher bandwidths to high priority traffic if congestion sets in. A similar configuration in the second switch ensures the same traffic treatment in the other direction.
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