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System Properties Comparison AgensGraph vs. Amazon SimpleDB

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Editorial information provided by DB-Engines
Name	AgensGraph  Xexclude from comparison	Amazon SimpleDB  Xexclude from comparison
Description	Multi-model database supporting relational and graph data models and built upon PostgreSQL	Hosted simple database service by Amazon, with the data stored in the Amazon Cloud. There is an unrelated product called SimpleDB developed by Edward Sciore
Primary database model	Graph DBMS Relational DBMS	Key-value store
DB-Engines Ranking measures the popularity of database management systems Trend Chart	Score 0.07 Rank #326   Overall #33   Graph DBMS #146   Relational DBMS	Score 2.09 Rank #123   Overall #24   Key-value stores
Website	bitnine.net	aws.amazon.com/­simpledb
Technical documentation	bitnine.net/­documentation	docs.aws.amazon.com/­simpledb
Developer	Bitnine Global Inc.	Amazon
Initial release	2016	2007
Current release	2.1, December 2018
License Commercial or Open Source	Open Source Apache License 2.0	commercial
Cloud-based only Only available as a cloud service	no	yes
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Implementation language	C
Server operating systems	Linux OS X Windows	hosted
Data scheme	depending on used data model	schema-free
Typing predefined data types such as float or date	yes	no
XML support Some form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.	no
Secondary indexes	yes	yes All columns are indexed automatically
SQL Support of SQL	yes	no
APIs and other access methods	Cypher Query Language JDBC	RESTful HTTP API
Supported programming languages	C Java JavaScript Python	.Net C C++ Erlang Java PHP Python Ruby Scala
Server-side scripts Stored procedures	yes	no
Triggers	no	no
Partitioning methods Methods for storing different data on different nodes	no, but can be realized using table inheritance	none Sharding must be implemented in the application
Replication methods Methods for redundantly storing data on multiple nodes	Source-replica replication	yes
MapReduce Offers an API for user-defined Map/Reduce methods	no	no
Consistency concepts Methods to ensure consistency in a distributed system	Immediate Consistency	Eventual Consistency Immediate Consistency can be specified for read operations
Foreign keys Referential integrity	yes	no
Transaction concepts Support to ensure data integrity after non-atomic manipulations of data	ACID	no Concurrent data updates can be detected by the application
Concurrency Support for concurrent manipulation of data	yes	yes
Durability Support for making data persistent	yes	yes
In-memory capabilities Is there an option to define some or all structures to be held in-memory only.	no
User concepts Access control	fine grained access rights according to SQL-standard	Access rights for users and roles can be defined via the AWS Identity and Access Management (IAM)
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More resources
	AgensGraph	Amazon SimpleDB
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