| Cache:
Increase your browser's cache setting so the most recently visited pages
can be stored for quick access at a later time.
Of course, too large a cache cuts down on free disk space and hurts performance.
Caching
Technologies
Cache is an easily accessible storage place for copies of files and data
that are frequently used.
Browser Web Caching is a storage area for local copies of frequently accessed
Web documents and associated graphics and files.
Web
caching is critically important
- Reduces bandwidth consumption.
- Requests for files cached on the hard drive never go out over the network.
- Reduces server load.
- Requests handled by the local machine never reach the server hosting
the original Web page.
Caches
have a general set of rules
- Page will not be cached if specific instructions to not cache the page
are included in the HTML code for the page.
- Page will not be cached if it is secure or authenticated
- Files are recalled directly from the cache if they have been stored
for a shorter time than the expiration time listed in the HTML code
- Files are recalled directly from the cache if the browser has downloaded
them during the session, and the cache is directed not to check for file
updates for files downloaded in that session.
- Files are recalled directly from the cache if the server validates that
the version in the cache is the same as the version of the file on the
server, even if the cached file is past its expiration point.
Proxy
cache
Store files requested by many individual clients on the same network.
When a client requests a page, the proxy checks its cache to see if another
client might have recently visited that page.
If a copy of the page is in the cache, the proxy server will recall this
stored copy of the page, rather than going out over the Internet to get
another copy.
Reverse
Proxy
May be placed between an Internet server and its Internet connection.
The proxy handles requests for the most popular pages by retrieving them
from the reverse proxy cache.
The server is used only to retrieve the less commonly requested pages.
This reduces the load on the web server.
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