The document discusses Hortonworks' Streams Messaging Manager (SMM) which provides a single monitoring dashboard for multiple Apache Kafka clusters. SMM aims to cure "Kafka blindness" by enabling visibility into data flows from producers to topics to consumers. It features monitoring of brokers, topics, producers and consumers with filtering and key performance indicators. SMM also integrates with other Hortonworks services and provides REST APIs for open integration. The high-level architecture shows SMM deployed as a DataPlane service across Hortonworks Data Platform and Hadoop distributions.