IDG Contributor Network: Bandwidth alone won’t solve application performance problems
When applications were exclusively hosted in the corporate data center, remote sites had much lower bandwidth and each required its own WAN optimization device. According to conventional wisdom, if we increase bandwidth, performance will improve. However, without decreasing latency, application performance will continue to suffer—no matter how much bandwidth we throw at the network.Four main things contribute to latency: Propagation delay Serialization delay Queuing delay Processing delay Propagation delayThis is the delay between two endpoints. For example, propagation delay is based on the speed of light measured at 5ms per 1000Km. The one-way propagation delay between a data center in New York and a branch in San Jose would be at least 24ms. This assumes a direct fiber path and no router hops, in which case the propagation delay will be significantly higher. For large carriers, one-way delays average 35-45 msec.To read this article in full or to leave a comment, please click here