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