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System ElasticSearch Oracle DB
 Version Version 6.4.1 (released in September 2018) 12c
 Drawbacks Elasticsearch AMI not available costly. You get comparable performance with open source rdbms databases
 Advantages Large number of drivers present for integration Robust. Long proven history. Remote connections very stable
 Languages Supported .Net Groovy Java JavaScript Perl PHP Python Ruby C, C++
 Website www.elastic.co/­products/­elasticsearch https://www.oracle.com
 Name ElasticSearch Oracle DB
 XML Support no yes
 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. It is a database commonly used for running online transaction processing (OLTP), data warehousing (DW) and mixed (OLTP & DW) database workloads
 Database Model Key Value NoSQL Model Primarily a relational database
 Technical Documentation www.elastic.co/­guide/­en/­elasticsearch/­reference/­current/­index.html docs.oracle.com/en/database
 License Open Source. Commercial version with HA available with redislabs.com Commercial
 Cloud-based / SaaS ElasticSearch Cloud Cluster available from ElasticSearch Available in AWS, Azure Clouds. Available as a SaaS option in Oracle Cloud
 Implementation Language C,C++ C,C++
 Operating System Supported Linux OS X Solaris Windows AIX HP-UX Linux OS X Solaris Windows z/OS
 Options for Integration / Access API Proprietary protocol using JSON Rest API (Oracle Lite), Oracle Call Interface (OCI) JDBC ODBC
 Consistency Highly Consistent Highly Consistent
 Foreign Keys No Yes
 Streaming Support Yes No
 Analytics Support NA Need to buy Exadata (high cost)
 Data Storage Schema Inverted Index Relational Database
 Notable Users -- Most of the Fortune 500 Companies
 Key Differentiator No known Enterprise Competitor apart from Amazaon Cloud Search Highly reliable as a transactional database
 Concurrency Yes Yes
 Partitioning Yes No
 Replication Yes Yes
 Secondary Indexes Yes Yes
 SchemaLess Yes No
 SQL Query No Yes