December 2001
Intermediate to advanced
416 pages
10h 4m
English
book
Building Scalable and High-Performance Java™ Web Applications Using J2EE™ Technology
by Greg Barish
Content preview from Building Scalable and High-Performance Java™ Web Applications Using J2EE™ Technology
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Caching and Replication
A cache is a structure that contains a copy of information that originates at some source. Generally speaking, a cache consists of a table of key/value pairs. For each pair, a key represents a question and the corresponding value represents an answer.
| City | County |
|---|---|
| Pleasanton | Alameda |
| Santa Clara | Santa Clara |
| Livermore | Alameda |
| Palo Alto | Santa Clara |
| Marina del Rey | Los Angeles |
| Garden Grove | Orange |
For example, to look up the California county that contains the city of Marina del Rey, we ask a question—What county is Marina del Rey located in?—and obtain an answer—Los Angeles. Table 4-1 shows this information in a sample cache of cities and counties.
The keys and values in a cache ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.