ElasticSearch - Open Source, Distributed, RESTful Search Engine

ElasticSearch is an open source, distributed, RESTful search engine built on top of Lucene. Its features include:

• Distributed and Highly Available Search Engine.
  • Each index is fully sharded with a configurable number of shards.
  • Each shard can have zero or more replicas.
  • Read / Search operations performed on either replica shard.

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