DBMS > Alibaba Cloud TSDB vs. IBM Db2 Event Store vs. Oracle Coherence vs. Yaacomo

System Properties Comparison Alibaba Cloud TSDB vs. IBM Db2 Event Store vs. Oracle Coherence vs. Yaacomo

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Editorial information provided by DB-Engines
Name	Alibaba Cloud TSDB  Xexclude from comparison	IBM Db2 Event Store  Xexclude from comparison	Oracle Coherence  Xexclude from comparison	Yaacomo  Xexclude from comparison
				Yaacomo seems to be discontinued and is removed from the DB-Engines ranking
Description	A stable, reliable, and cost-effective online high-performance time series database service	Distributed Event Store optimized for Internet of Things use cases	Oracles in-memory data grid solution	OpenCL based in-memory RDBMS, designed for efficiently utilizing the hardware via parallel computing
Primary database model	Time Series DBMS	Event Store Time Series DBMS	Key-value store	Relational DBMS
DB-Engines Ranking measures the popularity of database management systems Trend Chart	Score 0.29 Rank #301   Overall #26   Time Series DBMS	Score 0.27 Rank #309   Overall #2   Event Stores #28   Time Series DBMS	Score 1.97 Rank #129   Overall #22   Key-value stores
Website	www.alibabacloud.com/­product/­hitsdb	www.ibm.com/­products/­db2-event-store	www.oracle.com/­java/­coherence	yaacomo.com
Technical documentation	www.alibabacloud.com/­help/­en/­time-series-database/­latest/­what-is-tsdb	www.ibm.com/­docs/­en/­db2-event-store	docs.oracle.com/­en/­middleware/­standalone/­coherence
Developer	Alibaba	IBM	Oracle	Q2WEB GmbH
Initial release		2017	2007	2009
Current release		2.0	14.1, August 2023
License Commercial or Open Source	commercial	commercial free developer edition available	commercial	commercial
Cloud-based only Only available as a cloud service	yes	no	no	no
DBaaS offerings (sponsored links) Database as a Service Providers of DBaaS offerings, please contact us to be listed.
Implementation language		C and C++	Java
Server operating systems	hosted	Linux Linux, macOS, Windows for the developer addition	All OS with a Java VM	Android Linux Windows
Data scheme	schema-free	yes	schema-free	yes
Typing predefined data types such as float or date	Numeric data and Strings	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.	no	no	no	no
Secondary indexes	no	no	no	yes
SQL Support of SQL	no	yes through the embedded Spark runtime	no	yes
APIs and other access methods	HTTP REST	ADO.NET DB2 Connect JDBC ODBC RESTful HTTP API	JCache JPA RESTful HTTP API	JDBC ODBC
Supported programming languages	Java	C C# C++ Cobol Delphi Fortran Go Java JavaScript (Node.js) Perl PHP Python R Ruby Scala Visual Basic	.Net C++ Java
Server-side scripts Stored procedures	no	yes	no
Triggers	no	no	yes Live Events	yes
Partitioning methods Methods for storing different data on different nodes		Sharding	Sharding	horizontal partitioning
Replication methods Methods for redundantly storing data on multiple nodes		Active-active shard replication	yes, with selectable consistency level	Source-replica replication
MapReduce Offers an API for user-defined Map/Reduce methods	no	no	no	no
Consistency concepts Methods to ensure consistency in a distributed system	Immediate Consistency	Eventual Consistency	Eventual Consistency Immediate Consistency	Immediate Consistency
Foreign keys Referential integrity	no	no	no	yes
Transaction concepts Support to ensure data integrity after non-atomic manipulations of data	no	no	configurable	ACID
Concurrency Support for concurrent manipulation of data	yes	No - written data is immutable	yes	yes
Durability Support for making data persistent	yes	Yes - Synchronous writes to local disk combined with replication and asynchronous writes in parquet format to permanent shared storage	yes optionally	yes
In-memory capabilities Is there an option to define some or all structures to be held in-memory only.	no	yes	yes	yes
User concepts Access control	Access managed on TSDB instance level	fine grained access rights according to SQL-standard	authentification to access the cache via certificates or http basic authentication	fine grained access rights according to SQL-standard
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More resources
	Alibaba Cloud TSDB	IBM Db2 Event Store	Oracle Coherence	Yaacomo
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