The Cache Server is responsible for handling all report viewing requests. The Cache Server checks whether or not it can fulfill the request with a cached report page. If the Cache Server finds a cached page that displays exactly the required data, with data that has been refreshed from the database within the interval that you have specified as the default, the Cache Server returns that cached report page.
If the Cache Server cannot fulfil the request with a cached report page, it passes the request along to the Page Server. The Page Server runs the report and returns the results to the Cache Server. The Cache Server then caches the report page for future use, and returns the data to the viewer. By storing report pages in a cache, BusinessObjects Enterprise avoids accessing the database each and every time a report is requested.
If you are running multiple Page Servers for a single Cache Server, the Cache Server automatically balances the processing load across Page Servers.
For more information, see "Modifying Cache Server performance settings" on page 109.
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