NewsCache


General
Usenet News
The Problems
NewsCache, A Solution
Acknowledgements

NewsCache
What is NewsCache?
Functionality
Compatibility

Documentation
Installation
User's Manual
Mailing List
Publications

PSTL
Overview
Documentation
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For Students
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What is NewsCache?

NewsCache is a free cache server for USENET News available under the GNU General Public License. NewsCache can be plugged in between your news reader(s) and your news server. NewsCache acts to news readers like a news server and retrieves news articles from the news server like a news reader. Whenever, a client requests an article from NewsCache, NewsCache checks whether the article has already been stored in the cache area. If this is the case, the article is sent directly to its client. Otherwise, the article is requested from the upstream news server, stored in the cache area and sent back to the client.

Functionality

NewsCache provides the following functionality:

  • Offline news reading.
  • Small articles are stored within a single database. This improves performance and reduces the number of inodes used of your system.
  • The overview-database is generated on the fly for articles already cached by the cache server. This reduces the amount of disk space used, but decreases performance slightly.
  • The newsgroup-database is now managed as an array instead of a list to allow direct access to articles.
  • Merging different news servers to a virtual feed (on a per newsgroup basis).

Compatibility

All news readers conforming to the current NNTP standard as defined in RFC977 or in the new internet draft should work in combination with NewsCache. Currently, we have tested the following news readers: gnus, knews, MS Internet Mail and News, MS Outlook Express, netscape, slrn, tin, xrn. Some news readers, however, mark deleted articles as read which does not conform to the NNTP specification Fortunately, this can only be a problem, if NewsCache is used in offline mode. See Article Reinstatement Bug for details.

NewsCache should work in combination with all news servers that conform to the NNTP standard and provide an overview database. Currently, we have tested NewsCache in combination with: ANU NEWS (VMS), INN, MS Internet Services, Netscape Collabra.


© 1997-2000 Thomas Gschwind