6.6. Rate of Object Modifications
Another Web characteristic on which the utility of caching and replication depends is the update rate of Web objects. Update rates are important because they affect mechanisms for ensuring that a cache does not serve obsolete content to clients (see Chapter 10).
Douglis et al. [1997a] report some results based on accesses from several hundred research lab workers.[5] While it is unclear how representative this data is of general Web usage, the results should still give a rough idea of the tendencies.
[5] The extended version of this paper [Douglis et al. 1997b] also analyzes a trace from more than 7,000 clients. However, these results are not useful for our purposes because that trace excluded requests for images, ...
Get Web Caching and Replication now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
