Abbildungsverzeichnis

• Relationship between newsgroups and articles
• An example news article (header and body)
• A sample News network
• Growth of the Usenet in the past years
• Configuration with a server side News Cache
• Provision of local newsgroups
• Merging local and global newsgroups by an intermediate server
• Using a News Cache
• Workaround to multiplex between different news servers
• Where to locate a News Cache
• File system space overhead
• Cascading News Caches
• Notation used for the object-oriented design
• General structure of a news server
• State transition diagram for a news server
• Architecture of the News Cache
• Hierarchy of the News Server classes
• News reader using RServer class
• News server using LServer class
• News cache using CServer class
•  NVList 's virtual memory usage
• Class hierarchy of the Non Volatile Container classes
• Class hierarchy for the active database
• Class hierarchy for the overview database
• The News Cache Daemon
• Hierarchy of the News Server classes
• Relation between news server class and the news database
• Format of an NVContainer 's header
• Organization of the NVList class
• Organization of the NVHash class
• Interaction of the ActiveDB class with other classes
• Interaction of the OverviewDB class with other classes
• Merging local and global newsgroups by an intermediate cache server
• Notation for object-oriented models
• Example for object-oriented notation
• Notation used for finite state machines
• Example to the notation of finite state machines
• Telnet session to a news server's NNTP port
• A sample overview record
• News server configuration