CACHE EXPIRY IN MULTIPLE-SERVER ENVIRONMENT
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United States of America Patent
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Issued Date -
Feb 12, 2009
app pub date -
Aug 10, 2007
filing date -
Aug 10, 2007
priority date (Note) -
Abandoned
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Abstract
In a multiple-server or multiple-process environment where each server has a local cache, data in one cache may become obsolete because of changes to a data store performed by another server or entity. The present invention provides techniques for efficiently notifying servers as to cache expiry indications that indicate that their local cache data is out of date and should not be used. A cache expiry manager receives cache expiry indications from servers, and sends cache expiry indications to servers in conjunction with client requests or in response to certain trigger events. The need for broadcasting cache expiry notifications to all servers is eliminated, as servers can be informed of cache expiry indications the next time a server is being given a client request that relates to the cache in question. Extraneous and duplicative cache expiry notifications are reduced or eliminated.
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