DBMS > Atos Standard Common Repository vs. Datomic vs. Sadas Engine vs. VelocityDB

System Properties Comparison Atos Standard Common Repository vs. Datomic vs. Sadas Engine vs. VelocityDB

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Editorial information provided by DB-Engines
Name	Atos Standard Common Repository  Xexclude from comparison	Datomic  Xexclude from comparison	Sadas Engine  Xexclude from comparison	VelocityDB  Xexclude from comparison
	This system has been discontinued and will be removed from the DB-Engines ranking.
Description	Highly scalable database system, designed for managing session and subscriber data in modern mobile communication networks	Datomic builds on immutable values, supports point-in-time queries and uses 3rd party systems for durability	SADAS Engine is a columnar DBMS specifically designed for high performance in data warehouse environments	A .NET Object Database that can be embedded/distributed and extended to a graph data model (VelocityGraph)
Primary database model	Document store Key-value store	Relational DBMS	Relational DBMS	Graph DBMS Object oriented DBMS
DB-Engines Ranking measures the popularity of database management systems Trend Chart		Score 1.66 Rank #144   Overall #66   Relational DBMS	Score 0.07 Rank #373   Overall #157   Relational DBMS	Score 0.11 Rank #354   Overall #37   Graph DBMS #15   Object oriented DBMS
Website	atos.net/en/convergence-creators/portfolio/standard-common-repository	www.datomic.com	www.sadasengine.com	velocitydb.com
Technical documentation		docs.datomic.com	www.sadasengine.com/­en/­sadas-engine-download-free-trial-and-documentation/­#documentation	velocitydb.com/­UserGuide
Developer	Atos Convergence Creators	Cognitect	SADAS s.r.l.	VelocityDB Inc
Initial release	2016	2012	2006	2011
Current release	1703	1.0.7075, December 2023	8.0	7.x
License Commercial or Open Source	commercial	commercial limited edition free	commercial free trial version available	commercial
Cloud-based only Only available as a cloud service	no	no	no	no
DBaaS offerings (sponsored links) Database as a Service Providers of DBaaS offerings, please contact us to be listed.
Implementation language	Java	Java, Clojure	C++	C#
Server operating systems	Linux	All OS with a Java VM	AIX Linux Windows	Any that supports .NET
Data scheme	Schema and schema-less with LDAP views	yes	yes	yes
Typing predefined data types such as float or date	optional	yes	yes	yes
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.	yes	no	no	no
Secondary indexes	yes	yes	yes	yes
SQL Support of SQL	no	no	yes	no
APIs and other access methods	LDAP	RESTful HTTP API	JDBC ODBC Proprietary protocol	.Net
Supported programming languages	All languages with LDAP bindings	Clojure Java	.Net C C# C++ Groovy Java PHP Python	.Net
Server-side scripts Stored procedures	no	yes Transaction Functions	no	no
Triggers	yes	By using transaction functions	no	Callbacks are triggered when data changes
Partitioning methods Methods for storing different data on different nodes	Sharding cell division	none But extensive use of caching in the application peers	horizontal partitioning	Sharding
Replication methods Methods for redundantly storing data on multiple nodes	yes	none But extensive use of caching in the application peers	none
MapReduce Offers an API for user-defined Map/Reduce methods		no	no	no
Consistency concepts Methods to ensure consistency in a distributed system	Immediate Consistency or Eventual Consistency depending on configuration	Immediate Consistency	Immediate Consistency	Immediate Consistency
Foreign keys Referential integrity	no	no	yes	no
Transaction concepts Support to ensure data integrity after non-atomic manipulations of data	Atomic execution of specific operations	ACID		ACID
Concurrency Support for concurrent manipulation of data	yes	yes	yes	yes
Durability Support for making data persistent	yes	yes using external storage systems (e.g. Cassandra, DynamoDB, PostgreSQL, Couchbase and others)	yes	yes
In-memory capabilities Is there an option to define some or all structures to be held in-memory only.	yes	yes recommended only for testing and development	yes managed by 'Learn by Usage'	yes
User concepts Access control	LDAP bind authentication	no	Access rights for users, groups and roles according to SQL-standard	Based on Windows Authentication
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More resources
	Atos Standard Common Repository	Datomic	Sadas Engine	VelocityDB
Recent citations in the news	Infographic: What makes a Mobile Operator's setup future proof? 10 February 2024, Atos provided by Google News	Nubank buys firm behind Clojure programming language 28 July 2020, Finextra Architecting Software for Leverage 13 November 2021, InfoQ.com TerminusDB Takes on Data Collaboration with a git-Like Approach 1 December 2020, The New Stack Brazil’s Nubank acquires US software firm Cognitect, creator of Clojure and Datomic 24 July 2020, LatamList James Dixon Imagines A Data Lake That Matters 26 January 2015, Forbes provided by Google News

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