Mistake #1 is not having enough network bandwidth to support your solutions. The network you rely on for everyday computing is not necessarily the network you need to support your high availability (HA) solution. In fact, most HA solutions have elevated requirements for network bandwidth to accommodate the transmission of large amounts of business data. Insufficient network bandwidth will cause network latency, reducing the speed of data transfer and compromising integrity of that data. Severe bandwidth insufficiencies can degrade the reliability of your HA solution possibly result in high availability system failure.
Performing a detailed analysis of the data, applications and operating system information within your production site is the only way to accurately target your specific bandwidth requirements. This analysis takes time and expertise in order to achieve accurate results, and it should be done before the development and deployment of your HA solution. In the end, the bandwidth requirements needed to support your HA solution are unique to you and are based on your applications and computing environment, so you can’t make assumptions about what those requirements will be. Performing your bandwidth analysis up front is essential to ensuring HA success.