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ElasticSearch - Distributed, RESTful search and analytics engine
Elasticsearch is a distributed, RESTful search and analytics engine capable of solving a growing number of use cases. As the heart of the Elastic Stack, it centrally stores your data so you can discover the expected and uncover the unexpected.
searchengine search-engine full-text-search document-oriented percolator analytics nosqlLuwak - Open Source Streaming Query Engine
Luwak is a high performance stored query engine. Simply put, it allows you to define a set of search queries and then monitor a stream of documents for any that might match these queries: a function also known as reverse search and document routing. This is similar to Elasticsearch Percolator.
percolator stored-queries reverse-search document-routingFluo - 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).
percolator incremental-updates batch-processing big-data