AMPS has the capability to store real-time messages in a State of the World (SOW) database by topic – similar to how a SQL database stores data in a table. AMPS allows queries to the SOW database using content filters, similar to the way in which you query a SQL database. The content filter uses XPath Locator to identify the content of a message, similar to the use of column names in SQL database query. The SOW database in AMPS was designed with lock-free mechanisms, so that it can perform hundreds of thousands updates a second without impacting query performance.
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