Load balancing cooperating cache servers

Details Load balancing cooperating cache servers Load balancing cooperating cache servers

G - Physics

06

F

G06F 9/46 (2006.01) G06F 9/50 (2006.01) G06F 17/30 (2006.01)

Patent

CA 2343802

In a system including a collection of cooperating cache servers, such as proxy cache servers, a request can be forwarded to a cooperating cache server if the requested object cannot be found locally. An overload condition is detected if for example, due to reference skew, some objects are in high demand by all the clients and the cache servers that contain those hot objects become overloaded due to forwarded requests. In response, the load is balanced by shifting some or all of the forwarded requests from an overloaded cache server to a less loaded one. Both centralized and distributed load balancing environments are described.

Dans un système comprenant un ensemble de serveurs antémémoires coopératifs, tels que des serveurs antémémoires de procuration, une demande peut être acheminée vers un serveur antémémoire coopératif si l'objet demandé ne peut pas être trouvé localement. Un état de saturation est détecté si, par exemple, du fait d'une obliquité de référence, quelques objets font l'objet d'une demande élevée de tous les clients et si les serveurs antémémoires contenant ces objets "chauds" deviennent saturés en raison des demandes transmises. En réponse, la charge est équilibrée par transfert de tout ou partie des demandes transmises, du serveur antémémoire saturé vers un serveur moins chargé. L'invention concerne en outre des environnements d'équilibrage des charges tant centralisés que distribués.

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