Fluo - Make incremental updates to large data sets stored in Apache Accumulo

Apache Fluo (incubating) is an open source implementation of Percolator (which populates Google's search index) for Apache Accumulo. Fluo makes it possible to update the results of a large-scale computation, index, or analytic as new data is discovered. When combining new data with existing data, Fluo offers reduced latency when compared to batch processing frameworks (e.g Spark, MapReduce).

Incremental updates are implemented using transactions which allow thousands of updates to happen concurrently without corrupting data. Fluo applications consist of a series of observers that execute user code when observed data is updated.