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October 26, 2006

Linear Scaling for HTTP Session Clustering

posted by pallen

Traditional approaches to session clustering incur a significant performance hit due to the overhead of serializing objects. Terracotta avoids serialization and instead clusters by replicating only field-level changes to objects and additionally only replicating changes out to the application nodes as the changes are requested.

In our most recent performance tests, 6 Tomcat nodes clustered with Terracotta Sessions sustained over 7,000 TPS compared to about 2,000 TPS for 6 nodes clustered with Tomcat's built-in "Pooled Mode" clustering. For the detals, see the Terracotta & Tomcat Sessions white paper at: http://www.terracottatech.com/documentation.shtml

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