DBMS > Atos Standard Common Repository vs. Percona Server for MongoDB vs. VelocityDB vs. XTDB

System Properties Comparison Atos Standard Common Repository vs. Percona Server for MongoDB vs. VelocityDB vs. XTDB

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Editorial information provided by DB-Engines
Name	Atos Standard Common Repository  Xexclude from comparison	Percona Server for MongoDB  Xexclude from comparison	VelocityDB  Xexclude from comparison	XTDB formerly named Crux  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	A drop-in replacement for MongoDB Community Edition with enterprise-grade features.	A .NET Object Database that can be embedded/distributed and extended to a graph data model (VelocityGraph)	A general purpose database with bitemporal SQL and Datalog and graph queries
Primary database model	Document store Key-value store	Document store	Graph DBMS Object oriented DBMS	Document store
DB-Engines Ranking measures the popularity of database management systems Trend Chart		Score 0.60 Rank #246   Overall #39   Document stores	Score 0.11 Rank #354   Overall #37   Graph DBMS #16   Object oriented DBMS	Score 0.18 Rank #332   Overall #46   Document stores
Website	atos.net/en/convergence-creators/portfolio/standard-common-repository	www.percona.com/­mongodb/­software/­percona-server-for-mongodb	velocitydb.com	github.com/­xtdb/­xtdb www.xtdb.com
Technical documentation		docs.percona.com/­percona-distribution-for-mongodb	velocitydb.com/­UserGuide	www.xtdb.com/­docs
Developer	Atos Convergence Creators	Percona	VelocityDB Inc	Juxt Ltd.
Initial release	2016	2015	2011	2019
Current release	1703	3.4.10-2.10, November 2017	7.x	1.19, September 2021
License Commercial or Open Source	commercial	Open Source GPL Version 2	commercial	Open Source MIT License
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	C++	C#	Clojure
Server operating systems	Linux	Linux	Any that supports .NET	All OS with a Java 8 (and higher) VM Linux
Data scheme	Schema and schema-less with LDAP views	schema-free	yes	schema-free
Typing predefined data types such as float or date	optional	yes	yes	yes, extensible-data-notation format
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	no	limited SQL, making use of Apache Calcite
APIs and other access methods	LDAP	proprietary protocol using JSON	.Net	HTTP REST JDBC
Supported programming languages	All languages with LDAP bindings	Actionscript C C# C++ Clojure ColdFusion D Dart Delphi Erlang Go Groovy Haskell Java JavaScript Lisp Lua MatLab Perl PHP PowerShell Prolog Python R Ruby Scala Smalltalk	.Net	Clojure Java
Server-side scripts Stored procedures	no	JavaScript	no	no
Triggers	yes	no	Callbacks are triggered when data changes	no
Partitioning methods Methods for storing different data on different nodes	Sharding cell division	Sharding	Sharding	none
Replication methods Methods for redundantly storing data on multiple nodes	yes	Source-replica replication		yes, each node contains all data
MapReduce Offers an API for user-defined Map/Reduce methods		yes	no	no
Consistency concepts Methods to ensure consistency in a distributed system	Immediate Consistency or Eventual Consistency depending on configuration	Eventual Consistency Immediate Consistency	Immediate Consistency
Foreign keys Referential integrity	no	no	no	no
Transaction concepts Support to ensure data integrity after non-atomic manipulations of data	Atomic execution of specific operations	no	ACID	ACID
Concurrency Support for concurrent manipulation of data	yes	yes	yes	yes
Durability Support for making data persistent	yes	yes	yes	yes, flexibel persistency by using storage technologies like Apache Kafka, RocksDB or LMDB
In-memory capabilities Is there an option to define some or all structures to be held in-memory only.	yes	yes via In-Memory Engine	yes
User concepts Access control	LDAP bind authentication	Access rights for users and roles	Based on Windows Authentication
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More resources
	Atos Standard Common Repository	Percona Server for MongoDB	VelocityDB	XTDB formerly named Crux
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