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Oracle AS Web Cache Manager enables you to send either basic invalidation request for invalidation one object, or an advanced invalidation request for multiple objects, as described in the following topics: Oracle AS Web Cache processes the invalidation request, and returns the Cache Cleanup Result dialog box that the shows the invalidation status and the number of objects invalidated.The following figure shows the dialog box: Description of the illustration In a cache cluster environment, if .To do this, use the Many Web sites use scripts for uploading new content to databases and file systems.A large online book retailer, for instance, might run a PERL script once a day to bulk load new book listings and price changes into its catalog database.If any cluster member cannot be reached, Oracle AS Web Cache returns an error message and does not propagate the invalidation messages.During a cache cluster upgrade, you upgrade one cache cluster member at a time. However, because other cluster members have a different version of the configuration, the caches will not forward invalidation messages to those cache cluster members operating with a different version.In a cache cluster, you can enable or disable the propagation of invalidation requests to all cluster members.You specify the setting from the Cluster Members and Properties page of Application Server Control Console ( Inline invalidation is implemented as part of Edge Side Includes (ESI) and provides a useful way for origin servers to "piggyback" invalidation messages on transactional responses sent to Web Cache.
The invalidation request specifies the objects to invalidate, as well as the site host name of the objects.If you specify a cookie that was mistakenly specified for both a multiple-version object and a session caching policy, invalidation is based on any occurrence of the cookie.To avoid excessive invalidation, configure distinct cookies for multiple-version objects and session caching policies. Specify a comment to be included in the invalidation result.Instead, if the requested object is not cached by that cache or by cluster members with the same version of the configuration, Oracle AS Web Cache forwards the request to the origin server.When the cache cluster members are not running the same version of Oracle AS Web Cache, you can still invalidate objects, and you can propagate the invalidation to other cluster members, but the invalidation message must originate from the cache that is operating with the earlier version of Oracle AS Web Cache.