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System ElasticSearch Azure Cosmos DB
 Name ElasticSearch Azure Cosmos DB
 Version Version 6.4.1 (released in September 2018) NA
 Drawbacks Elasticsearch AMI not available 1.Most often compared with MongoDB. Unlike Mongo DB does not support joins 2.Managed Database which can be used only within Azure/Microsoft framework
 Advantages Large number of drivers present for integration NA
 Languages Supported .Net Groovy Java JavaScript Perl PHP Python Ruby .net, C#, Javascript
 Website www.elastic.co/­products/­elasticsearch www.azure.microsoft.com/­services/­cosmos-db
 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. 1.Globally distributed, horizontally scalable, multi-model database service 2.Earlier called Azure Document DB. Skype, Xbox uses this DB, Office, Active Directory and MSC (all Microsoft products)
 Database Model Key Value NoSQL Model Key Value DB
 Technical Documentation www.elastic.co/­guide/­en/­elasticsearch/­reference/­current/­index.html docs.microsoft.com/­en-us/­azure/­cosmos-db
 License Open Source. Commercial version with HA available with redislabs.com commercial on azure cloud.
 Cloud-based / SaaS ElasticSearch Cloud Cluster available from ElasticSearch Azure Cloud based
 Implementation Language C,C++ NA
 Operating System Supported Linux OS X Solaris Windows Linux , OS X, Windows
 Options for Integration / Access API Proprietary protocol using JSON Rest API , MongoDB drivers
 Consistency Highly Consistent Eventual consistency
 Foreign Keys No No
 Streaming Support Yes No
 Analytics Support NA NA
 Data Storage Schema Inverted Index Multi Model Database
 Notable Users -- --
 Key Differentiator No known Enterprise Competitor apart from Amazaon Cloud Search --
 Concurrency Yes --
 Partitioning Yes --
 Replication Yes --
 Secondary Indexes Yes --
 SchemaLess Yes --
 SQL Query No --