DBMS > Alibaba Cloud TSDB vs. Atos Standard Common Repository vs. EJDB vs. IBM Db2 Event Store

System Properties Comparison Alibaba Cloud TSDB vs. Atos Standard Common Repository vs. EJDB vs. IBM Db2 Event Store

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Editorial information provided by DB-Engines
Name	Alibaba Cloud TSDB  Xexclude from comparison	Atos Standard Common Repository  Xexclude from comparison	EJDB  Xexclude from comparison	IBM Db2 Event Store  Xexclude from comparison
		This system has been discontinued and will be removed from the DB-Engines ranking.
Description	A stable, reliable, and cost-effective online high-performance time series database service	Highly scalable database system, designed for managing session and subscriber data in modern mobile communication networks	Embeddable document-store database library with JSON representation of queries (in MongoDB style)	Distributed Event Store optimized for Internet of Things use cases
Primary database model	Time Series DBMS	Document store Key-value store	Document store	Event Store Time Series DBMS
DB-Engines Ranking measures the popularity of database management systems Trend Chart	Score 0.29 Rank #301   Overall #26   Time Series DBMS		Score 0.31 Rank #296   Overall #44   Document stores	Score 0.27 Rank #309   Overall #2   Event Stores #28   Time Series DBMS
Website	www.alibabacloud.com/­product/­hitsdb	atos.net/en/convergence-creators/portfolio/standard-common-repository	github.com/­Softmotions/­ejdb	www.ibm.com/­products/­db2-event-store
Technical documentation	www.alibabacloud.com/­help/­en/­time-series-database/­latest/­what-is-tsdb		github.com/­Softmotions/­ejdb/­blob/­master/­README.md	www.ibm.com/­docs/­en/­db2-event-store
Developer	Alibaba	Atos Convergence Creators	Softmotions	IBM
Initial release		2016	2012	2017
Current release		1703		2.0
License Commercial or Open Source	commercial	commercial	Open Source GPLv2	commercial free developer edition available
Cloud-based only Only available as a cloud service	yes	no	no	no
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Implementation language		Java	C	C and C++
Server operating systems	hosted	Linux	server-less	Linux Linux, macOS, Windows for the developer addition
Data scheme	schema-free	Schema and schema-less with LDAP views	schema-free	yes
Typing predefined data types such as float or date	Numeric data and Strings	optional	yes string, integer, double, bool, date, object_id	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.	no	yes		no
Secondary indexes	no	yes	no	no
SQL Support of SQL	no	no	no	yes through the embedded Spark runtime
APIs and other access methods	HTTP REST	LDAP	in-process shared library	ADO.NET DB2 Connect JDBC ODBC RESTful HTTP API
Supported programming languages	Java	All languages with LDAP bindings	Actionscript C C# C++ Go Java JavaScript (Node.js) Lua Objective-C Pike Python Ruby	C C# C++ Cobol Delphi Fortran Go Java JavaScript (Node.js) Perl PHP Python R Ruby Scala Visual Basic
Server-side scripts Stored procedures	no	no	no	yes
Triggers	no	yes	no	no
Partitioning methods Methods for storing different data on different nodes		Sharding cell division	none	Sharding
Replication methods Methods for redundantly storing data on multiple nodes		yes	none	Active-active shard replication
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	Immediate Consistency or Eventual Consistency depending on configuration		Eventual Consistency
Foreign keys Referential integrity	no	no	no typically not needed, however similar functionality with collection joins possible	no
Transaction concepts Support to ensure data integrity after non-atomic manipulations of data	no	Atomic execution of specific operations	no	no
Concurrency Support for concurrent manipulation of data	yes	yes	yes Read/Write Locking	No - written data is immutable
Durability Support for making data persistent	yes	yes	yes	Yes - Synchronous writes to local disk combined with replication and asynchronous writes in parquet format to permanent shared storage
In-memory capabilities Is there an option to define some or all structures to be held in-memory only.	no	yes		yes
User concepts Access control	Access managed on TSDB instance level	LDAP bind authentication	no	fine grained access rights according to SQL-standard
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More resources
	Alibaba Cloud TSDB	Atos Standard Common Repository	EJDB	IBM Db2 Event Store
Recent citations in the news				Advancements in streaming data storage, real-time analysis and machine learning 25 July 2019, ibm.com How IBM Is Turning Db2 into an ‘AI Database’ 3 June 2019, Datanami Best cloud databases of 2022 4 October 2022, ITPro Why a robust data management strategy is essential today | IBM HDM 19 September 2019, Express Computer provided by Google News

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