Feature Descriptions

 Anticipation

    Client Prefetching
    Client determines which pages to load in the background.
    Drawback: can interfere with other processes on the client's machine, esp. if the machine has limited resources.
    Server Presending
    Server chooses unrequested files to send.
    Drawback: places additional burden on a busy server.
    Third-party
    Dedicated-task machine makes file anticipation decisions and handles fetching/loading.
    Location of this machine is crucial as it can impact the success of the algorithm.

 Configuration

    Manual
    User determines sites and features to be used
    Drawback: user may not be aware of all possible sites, may not configure optimally.
    Dynamic
    Participating machines seek each other and self-configure

 Cache Organization

 Intermediate Proxies

    Protocol
    Protocol is implemented by intermediate proxies.
    Caching
    File caching is done at intermediate proxies.

 User Aggregation

    Single User
    Benefit: system is tailored to the use of an individual, maximum impact to performance
    Multi-User
    Aggregate behavior patterns influence system performance.
    Benefit: shared work among users.
    Both
    System can function well with one or any number of users.

 Connection Aggregation

    Single User
    One server-client connection is used to transfer all files
    Multi-User
    Files are multicast to users.
    Benefit: aggregates groups of requests.
    Benefit: reduces bandwidth consumption.

 Data Aggregation

    Subject
    Like subjects are packed together into a "channel" for special manipulation.
    Profile
    Files with similar characteristics, like size or access frequency, are grouped together for special manipulation.
 

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This page written and maintained by Joe Touch.
Please mail me any problems with or comments about this page.
Last modified Jan. 15, 1998.