Integrated Caching
A good majority of content on the web is fairly static. Granted, the current nature of the web means that new content is created all the time, but it doesn't change with every request and some items, like the branding on a company's homepage, stay unchanged for years. Integrated Caching is an HTTP feature on the NetScaler that allows potentially massive savings on bandwidth and server CPU utilization by storing a copy of previously requested objects in its RAM and serving them to users over and over again as long as it is considered valid.
Let's look at some caching-related terms that we will use in this chapter:
- Origin server: This is the server in the backend that generates and owns the original content
- Cache hit: This means that a request that has landed on the NetScaler can be responded to with an object from the cache
- Cache miss: The request has to be sent to the origin server
- Revalidation: This is the NetScaler going back to the server to verify that...
