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System ElasticSearch Apache Cassandra
 Version Version 6.4.1 (released in September 2018) 3
 Drawbacks Elasticsearch AMI not available community support only available
 Name ElasticSearch Apache Cassandra
 Advantages Large number of drivers present for integration Open Source Columnar NoSQL Database with excellent performance
 Languages Supported .Net Groovy Java JavaScript Perl PHP Python Ruby C C# C++ Java Node.js PHP Python Ruby
 Website www.elastic.co/­products/­elasticsearch www.datastax.com/products/datastax-enterprise
 XML Support no no
 JSON Support yes yes
 Brief description Elasticsearch is a search engine based on Lucene. It provides a distributed, multitenant-capable full-text search engine with an HTTP web interface and schema-free JSON documents. MongoDB is a free and open-source cross-platform document-oriented database program. Classified as a NoSQL database program, MongoDB uses JSON-like documents with schemata. MongoDB is developed by MongoDB Inc.
 Database Model Key Value NoSQL Model Primarily a NoSQL database
 Technical Documentation www.elastic.co/­guide/­en/­elasticsearch/­reference/­current/­index.html docs.datastax.com
 License Open Source. Commercial version with HA available with redislabs.com Commercial
 Cloud-based / SaaS ElasticSearch Cloud Cluster available from ElasticSearch Virtual Machine Images available in AWS Azure and Google Cloud Marketplace. https://bitnami.com/stack/cassandra/cloud/aws
 Implementation Language C,C++ C,C++
 Operating System Supported Linux OS X Solaris Windows Linux OS X Solaris Windows
 Options for Integration / Access API Proprietary protocol using JSON CQL (Cassandra Query Language is like SQL) Thrift Protocol
 Consistency Highly Consistent Highly Consistent
 Foreign Keys No No
 Streaming Support Yes Yes
 Analytics Support NA One of the core features is to build timeseries apps
 Data Storage Schema Inverted Index Key Value Column Family NoSQL DB
 Notable Users -- Samsung Smartthings, ING Vysya , Safeway
 Key Differentiator No known Enterprise Competitor apart from Amazaon Cloud Search Open Source NoSQL DB. The GoTo DB for Columnar NoSQL databases
 Concurrency Yes Yes
 Partitioning Yes Yes
 Replication Yes Yes - Tunable Master-Slave Replication
 Secondary Indexes Yes Yes
 SchemaLess Yes Yes
 SQL Query No No, but CQL is similar to SQL