To address the performance problems associated with data retrieval, optimizing delivery of application traffic over the WAN has emerged as the strategic solution of choice for enterprises worldwide. Optimizing the amount of data that traverses the WAN, the strategy at the core of most WAN optimization solutions, is an excellent solution – but it isn’t the only one. One of the largest factors affecting data retrieval response time is the distance between the data and the user. Optimizing WAN traffic clearly provides an enhancement, but a solution that does not require data be retrieved across the WAN at all is clearly the most ideal. This can be achieved with various forms of caching. Because response time improvement is crucial, a comprehensive WAN optimization solution must include not only the most popular WAN optimization technologies such as protocol optimization, bandwidth management, and compression, but also two forms of caching – object caching and byte caching. While byte caching is more prevalent in WAN optimization solutions, object caching is a key component currently lacking in most solutions. Because caching minimizes the transmission of data over the WAN and allows data to be served immediately, this technology directly improves response time and bandwidth utilization.
The goal of this whitepaper is to discuss the role of caching, describe in detail how object caching and byte caching works, and show how these caching technologies work together to deliver true performance differentiation.