DBMS > Alibaba Cloud TSDB vs. Atos Standard Common Repository vs. EJDB vs. XTDB

System Properties Comparison Alibaba Cloud TSDB vs. Atos Standard Common Repository vs. EJDB vs. XTDB

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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	XTDB formerly named Crux  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)	A general purpose database with bitemporal SQL and Datalog and graph queries
Primary database model	Time Series DBMS	Document store Key-value store	Document store	Document store
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 0.18 Rank #332   Overall #46   Document stores
Website	www.alibabacloud.com/­product/­hitsdb	atos.net/en/convergence-creators/portfolio/standard-common-repository	github.com/­Softmotions/­ejdb	github.com/­xtdb/­xtdb www.xtdb.com
Technical documentation	www.alibabacloud.com/­help/­en/­time-series-database/­latest/­what-is-tsdb		github.com/­Softmotions/­ejdb/­blob/­master/­README.md	www.xtdb.com/­docs
Developer	Alibaba	Atos Convergence Creators	Softmotions	Juxt Ltd.
Initial release		2016	2012	2019
Current release		1703		1.19, September 2021
License Commercial or Open Source	commercial	commercial	Open Source GPLv2	Open Source MIT License
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		Java	C	Clojure
Server operating systems	hosted	Linux	server-less	All OS with a Java 8 (and higher) VM Linux
Data scheme	schema-free	Schema and schema-less with LDAP views	schema-free	schema-free
Typing predefined data types such as float or date	Numeric data and Strings	optional	yes string, integer, double, bool, date, object_id	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.	no	yes		no
Secondary indexes	no	yes	no	yes
SQL Support of SQL	no	no	no	limited SQL, making use of Apache Calcite
APIs and other access methods	HTTP REST	LDAP	in-process shared library	HTTP REST JDBC
Supported programming languages	Java	All languages with LDAP bindings	Actionscript C C# C++ Go Java JavaScript (Node.js) Lua Objective-C Pike Python Ruby	Clojure Java
Server-side scripts Stored procedures	no	no	no	no
Triggers	no	yes	no	no
Partitioning methods Methods for storing different data on different nodes		Sharding cell division	none	none
Replication methods Methods for redundantly storing data on multiple nodes		yes	none	yes, each node contains all data
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
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	ACID
Concurrency Support for concurrent manipulation of data	yes	yes	yes Read/Write Locking	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.	no	yes
User concepts Access control	Access managed on TSDB instance level	LDAP bind authentication	no
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