Apache NiFi

Apache NiFi is open source data flow tool. It has web user interface where you can build data flow between disparate systems. The flow can be versioned and exported. NiFi 's design closely align with  flow based programming. It comes with pre-built processors and connectors which can connect with multiple systems.  NiFi cluster is based on Zero-Master Cluster paradigm.  Apache Zookeeper elects one node as Primary and one node as Coordinator.    Each node in cluster performs same task but on a different set of data.



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