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System CouchDB AWS Aurora
 Name CouchDB AWS Aurora
 Version 3.3.5 Version 4.2.8
 Drawbacks 1 Does not have capabilities present in an RDF data store e.g does not support SparQL NA
 Advantages NA Managed RDBMS from AWS
 Languages Supported .net, C#, Javascript Content Management Interoperability Services (CMIS)
 Website apache.couchdb.org aws.amazon.com/rds/aurora/
 XML Support NA no
 JSON Support yes yes
 Brief description Open Source Transactional database with native graph storage and processing Aurora is available as part of the Amazon Relational Database Service (RDS). Although it is a proprietary technology it offers MySQL compatible service since its release . This was made PostgreSQL compatible since October 2017
 Database Model Property Graph Relational Database
 Technical Documentation docs.microsoft.com/­en-us/­azure/­cosmos-db https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/Aurora.Overview.html
 License Community license can be run on 1 node.Enterprise License supports multi-node cluster deployment Commercial
 Cloud-based / SaaS Amazon AMI available, On Prem can be installed SaaS Service from AWS
 Implementation Language Java API NA
 Operating System Supported Linux , OS X, Windows Not Applicable as its managed by AWS
 Options for Integration / Access API Rest API Restful HTTP
 Consistency NA NA
 Foreign Keys No Yes
 Streaming Support No Yes
 Analytics Support No NA
 Data Storage Schema Key Value Store presented as Document DB NA
 Notable Users -- NA
 Key Differentiator -- Supports MySQL as a SaaS service (Inno Db Engine). Disk Space provisioning done in 10 GB chunks automatically upto 64 TB.
 Concurrency -- Yes
 Partitioning -- No
 Replication -- Yes
 Secondary Indexes -- Yes based on secondary indexes using Solr
 SchemaLess -- Yes
 SQL Query -- No