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System ElasticSearch Cassandra (Datastax)
 Version Version 6.4.1 (released in September 2018) 2.1
 Drawbacks Elasticsearch AMI not available Paid Version, License Fees, Support Fees
 Advantages Large number of drivers present for integration DB Failover capability, Enterprise support available
 Website www.elastic.co/­products/­elasticsearch www.datastax.com
 XML Support no Not Available.Generally not available in NOSQL DB. Well known RDBMS have this feature
 Name ElasticSearch Cassandra (Datastax)
 Languages Supported .Net Groovy Java JavaScript Perl PHP Python Ruby C C# C++ Java Node.js PHP Python Ruby
 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. DataStax was built on the open source NoSQL database Apache Cassandra. Cassandra was initially developed internally at Facebook to handle large data sets across multiple servers. It was released as an Apache open source project in 2008
 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 and Azure Marketplace. Available as a Hybrid Cloud SaaS Option - NA
 Implementation Language C,C++ C,C++
 Operating System Supported Linux OS X Solaris Windows Linux, OS X,
 Options for Integration / Access API Proprietary protocol using JSON CQL (Cassandra Query Language is like SQL) Gremlin
 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 Graph DB built natively on top of the core NoSQL Column Store. Graph and NoSQL component share the same core. Enterprise version of Cassandra supports HighAvailability (HA)
 Concurrency Yes Yes
 Partitioning Yes Yes
 Replication Yes Yes
 Secondary Indexes Yes Yes
 SchemaLess Yes Yes
 SQL Query No No, but CQL is similar to SQL