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System Exadata ElasticSearch
 Version x6-8 Version 6.4.1 (released in September 2018)
 Drawbacks Very costly. You get comparable performance with lower cost Elasticsearch AMI not available
 Advantages Robust. Comes from the Oracle Stable Large number of drivers present for integration
 Languages Supported All languages supported by Oracle Database .Net Groovy Java JavaScript Perl PHP Python Ruby
 Website https://www.oracle.com/engineered-systems/exadata/index.html www.elastic.co/­products/­elasticsearch
 Name -- ElasticSearch
 XML Support -- no
 JSON Support -- 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.
 Database Model -- Key Value NoSQL Model
 Technical Documentation -- www.elastic.co/­guide/­en/­elasticsearch/­reference/­current/­index.html
 License -- Open Source. Commercial version with HA available with redislabs.com
 Cloud-based / SaaS -- ElasticSearch Cloud Cluster available from ElasticSearch
 Implementation Language -- C,C++
 Operating System Supported -- Linux OS X Solaris Windows
 Options for Integration / Access API -- Proprietary protocol using JSON
 Consistency -- Highly Consistent
 Foreign Keys -- No
 Streaming Support -- Yes
 Analytics Support -- NA
 Data Storage Schema -- Inverted Index
 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