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What are the different routing/load balancing algorithms?

April 26, 2017algorithms different load routing

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What are the different routing/load balancing algorithms?

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Mod_oc4j provides three distinct kinds of routing: (a) round robin, (b) random and (c) metric based. The effective performance of round robin and random algorithms is the same. The latter, metric based routing, is based on OC4J process informing mod_oc4j of a metric based on its internal resource availability (ex. connection pools). Mod_oc4j then uses this metric to make routing decisions. These load balancing/routing algorithms also have a flavor – affinity based. In this mode (it is the default mode), these algorithms will always route to the local node, except in cases when no process is available on the local node. The random and round robin algorithms have an extra flavor – weight based. In case of weight based, mod_oc4j distributes requests according to the routing weight configured for each host. Refer to Oracle HTTP Server Administrator’s Guide for more details on load balancing algorithms.