Importance

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Abstract

A multi-tier caching system is provided for a computing device. The system comprises a first cache implemented in operating system or kernel space (e.g., in memory managed by or allocated to an operating system). The system also comprises a second cache implemented in application or user space (e.g., in memory managed by or allocated to an application program). Also provided is a method of operating the multi-tier caching system to serve one type of data from the first cache and a second type of data from the second cache. The first cache may store frequently requested data items and/or those that require little processing of a data request in order to identify a responsive data item. The first cache may also store data items that can be served in response to data requests having different forms, types, parameters, qualifiers or other indicia. Data that may vary according to the form or content of a data request, and data items that are responsive to data requests that must be fully parsed, examined or processed may be stored in the second cache. A content analysis engine may be configured to determine which of said first cache and said second cache a data item should be stored in. Such determinations may be made by analyzing data requests and/or data items served in response to the requests, guidelines set by a system administrator, and other criteria.

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First Claim