The document discusses data-driven business and reactive marketing technology. It begins with key questions about data-driven business, the benefits of analytics, and introduces the "9D" model for big data business. Tools for building reactive marketing technology are presented, including Apache Storm, Apache Kafka, Apache Spark, and the Hadoop ecosystem. A case study demonstrates how to build a digital marketing software using open source big data tools. The philosophy and a lightweight lambda architecture for building a reactive system is described.
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