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Networks

What is Capacity Planning?

Capacity planning is an important aspect of computer networking; proper planning ensures a healthy network that can grow to meet future needs.

QoS - Quality of Service

QoS is an increasingly important approach to managing network capacity as more sophisticated and varied Internet applications and services get deployed.

QoS (Quality of Service) refers to a broad collection of networking technologies and techniques. The goal of QoS is to provide guarantees on the ability of a network to deliver predictable results. Elements of network performance within the scope of QoS often include availability (uptime), bandwidth (throughput), latency (delay), and error rate.
QoS involves prioritization of network traffic. QoS can be targeted at a network interface, toward a given server or router's performance, or in terms of specific applications. A network monitoring system must typically be deployed as part of QoS, to insure that networks are performing at the desired level.

QoS is an specially important for the new generation of Internet applications such as VoIP, video-on-demand and other consumer services.

Some core networking technologies like Ethernet were not designed to support prioritized traffic or guaranteed performance levels, making it much more difficult to implement QoS solutions across the Internet.

Web Site Capacity Planning-Best of the Net

Microsoft's capacity planning white paper offers excellent background information on capacity planning for Web sites (with a focus on Microsoft-specific technologies).