DBMS > CouchDB vs. IRONdb vs. Kyligence Enterprise vs. Yaacomo

System Properties Comparison CouchDB vs. IRONdb vs. Kyligence Enterprise vs. Yaacomo

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Editorial information provided by DB-Engines
Name	CouchDB stands for "Cluster Of Unreliable Commodity Hardware"  Xexclude from comparison	IRONdb  Xexclude from comparison	Kyligence Enterprise  Xexclude from comparison	Yaacomo  Xexclude from comparison
Description	A native JSON - document store inspired by Lotus Notes, scalable from globally distributed server-clusters down to mobile phones.	A distributed Time Series DBMS with a focus on scalability, fault tolerance and operational simplicity	A distributed analytics engine for big data, built on top of Apache Kylin	OpenCL based in-memory RDBMS, designed for efficiently utilizing the hardware via parallel computing
Primary database model	Document store	Time Series DBMS	Relational DBMS	Relational DBMS
Secondary database models	Spatial DBMS using the Geocouch extension
DB-Engines Ranking measures the popularity of database management systems Trend Chart	Score 17.16 Rank #41   Overall #7   Document stores	Score 0.00 Rank #363   Overall #34   Time Series DBMS	Score 0.22 Rank #287   Overall #135   Relational DBMS	Score 0.01 Rank #356   Overall #155   Relational DBMS
Website	couchdb.apache.org	www.circonus.com/­solutions/­time-series-database	kyligence.io/­kyligence-enterprise	yaacomo.com
Technical documentation	docs.couchdb.org/­en/­stable	docs.circonus.com/­irondb
Developer	Apache Software Foundation Apache top-level project, originally developed by Damien Katz, a former Lotus Notes developer	Circonus LLC.	Kyligence, Inc.	Q2WEB GmbH
Initial release	2005	2017	2016	2009
Current release	3.2.2, April 2022	V0.10.20, January 2018
License Commercial or Open Source	Open Source Apache version 2	commercial	commercial	commercial
Cloud-based only Only available as a cloud service	no	no	no	no
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Implementation language	Erlang	C and C++	Java
Server operating systems	Android BSD Linux OS X Solaris Windows	Linux	Linux	Android Linux Windows
Data scheme	schema-free	schema-free	yes	yes
Typing predefined data types such as float or date	no	yes text, numeric, histograms	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	yes via views	no	yes	yes
SQL Support of SQL	no	SQL-like query language (Circonus Analytics Query Language: CAQL)	ANSI SQL for queries (using Apache Calcite)	yes
APIs and other access methods	RESTful HTTP/JSON API	HTTP API	JDBC ODBC RESTful HTTP API	JDBC ODBC
Supported programming languages	C C# ColdFusion Erlang Haskell Java JavaScript Lisp Lua Objective-C OCaml Perl PHP PL/SQL Python Ruby Smalltalk	.Net C C++ Clojure Erlang Go Haskell Java JavaScript JavaScript (Node.js) Lisp Lua Perl PHP Python R Ruby Rust Scala
Server-side scripts Stored procedures	View functions in JavaScript	yes, in Lua
Triggers	yes	no		yes
Partitioning methods Methods for storing different data on different nodes	Sharding improved architecture with release 2.0	Automatic, metric affinity per node		horizontal partitioning
Replication methods Methods for redundantly storing data on multiple nodes	Multi-source replication Source-replica replication	configurable replication factor, datacenter aware		Source-replica replication
MapReduce Offers an API for user-defined Map/Reduce methods	yes	no	yes	no
Consistency concepts Methods to ensure consistency in a distributed system	Eventual Consistency	Immediate consistency per node, eventual consistency across nodes	Immediate Consistency	Immediate Consistency
Foreign keys Referential integrity	no	no		yes
Transaction concepts Support to ensure data integrity after non-atomic manipulations of data	no atomic operations within a single document possible	no		ACID
Concurrency Support for concurrent manipulation of data	yes strategy: optimistic locking	yes	yes	yes
Durability Support for making data persistent	yes	yes	yes	yes
In-memory capabilities Is there an option to define some or all structures to be held in-memory only.	no	no	no	yes
User concepts Access control	Access rights for users can be defined per database	no		fine grained access rights according to SQL-standard
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More resources
	CouchDB stands for "Cluster Of Unreliable Commodity Hardware"	IRONdb	Kyligence Enterprise	Yaacomo
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