expires: [,] options: } For each method name (timehash, cnfs, timecaf, tradspool, or trash), define the newsgroup(s) that applies to the method. Wildcard characters (*, ?, and so on) that can be used are described in the “Understanding Wildmat Characters” sidebar, earlier in this chapter. The optional class value can be assigned a number (0, 1, and so on) that matches an entry in the expire.ctl file where article expiration times are stored. The optional size value determines the minimum and maximum size an article can be. (A 0 as maxsize places no limits on article size.) The optional expires value determines the storage class based on the Expires: headers in the article. The options value (which is itself optional) can be used to set options that are specific to a method. Using the timehash storage method The timehash storage method stores newsgroup articles based on when your news server receives them. The following timehash method entry examples are contained in the storage.conf file itself. You can uncomment and modify these entries to create your own entries: method timehash { newsgroups: * class: 0 } method timehash { newsgroups: alt.binaries.* class: 1 size: 2,32000 } method timehash { newsgroups: alt.* class: 2 size: 1 } The first timehash entry matches all newsgroups that come in (*). The class number basically identifies a class that matches expiration time settings for newsgroups that are stored with the entry. (See the description of expire.ctl in “Setting Up Expiration Times,” later in the chapter, for information on how each class is defined.) The second timehash entry assigns a class (1) and size (2-byte to 32,000-byte limit) on newsgroups below the alt.binaries hierarchy. The third timehash entry is an example of assigning a class (2) and a size (1 to an unlimited number of characters) to all groups under the alt newsgroup hierarchy. Using the cnfs storage method The cnfs newsgroup storage method is an efficient way to rotate out newsgroup articles based on how many articles have been received (rather than just when they were received). Although this method is more complicated to configure, it is a good way to manage the size of your incoming news article database. Tip The INN installation instructions recommend the cnfs method of storing articles if you have a full news feed. This method is much more efficient than the timehash storage method for managing the volume of news that must be handled nowadays. Here are some examples of cnfs method entries from the storage.conf file. You can uncomment and modify these entries to suit your configuration: method cnfs { newsgroups: * class: 1 size: 0,3999 expires 4d1s options: FAQS
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