DBMS > CouchDB vs. H2GIS vs. Impala

System Properties Comparison CouchDB vs. H2GIS vs. Impala

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Editorial information provided by DB-Engines
Name	CouchDB stands for "Cluster Of Unreliable Commodity Hardware"  Xexclude from comparison	H2GIS  Xexclude from comparison	Impala  Xexclude from comparison
Description	A native JSON - document store inspired by Lotus Notes, scalable from globally distributed server-clusters down to mobile phones.	Spatial extension of H2	Analytic DBMS for Hadoop
Primary database model	Document store	Spatial DBMS	Relational DBMS
Secondary database models	Spatial DBMS using the Geocouch extension	Relational DBMS	Document store
DB-Engines Ranking measures the popularity of database management systems Trend Chart	Score 17.16 Rank #41   Overall #7   Document stores	Score 0.03 Rank #341   Overall #4   Spatial DBMS	Score 17.79 Rank #40   Overall #25   Relational DBMS
Website	couchdb.apache.org	www.h2gis.org	www.cloudera.com/­products/­open-source/­apache-hadoop/­impala.html
Technical documentation	docs.couchdb.org/­en/­stable	www.h2gis.org/­docs/­home	docs.cloudera.com/­documentation/­enterprise/­latest/­topics/­impala.html
Developer	Apache Software Foundation Apache top-level project, originally developed by Damien Katz, a former Lotus Notes developer	CNRS	Cloudera
Initial release	2005	2013	2013
Current release	3.2.2, April 2022		4.0.0, July 2021
License Commercial or Open Source	Open Source Apache version 2	Open Source LGPL 3.0	Open Source Apache Version 2
Cloud-based only Only available as a cloud service	no	no	no
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Implementation language	Erlang	Java	C++
Server operating systems	Android BSD Linux OS X Solaris Windows		Linux
Data scheme	schema-free	yes	yes
Typing predefined data types such as float or date	no	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
Secondary indexes	yes via views	yes	yes
SQL Support of SQL	no	yes	SQL-like DML and DDL statements
APIs and other access methods	RESTful HTTP/JSON 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	Java	All languages supporting JDBC/ODBC
Server-side scripts Stored procedures	View functions in JavaScript	yes based on H2	yes user defined functions and integration of map-reduce
Triggers	yes	yes	no
Partitioning methods Methods for storing different data on different nodes	Sharding improved architecture with release 2.0	none	Sharding
Replication methods Methods for redundantly storing data on multiple nodes	Multi-source replication Source-replica replication	yes based on H2	selectable replication factor
MapReduce Offers an API for user-defined Map/Reduce methods	yes	no	yes query execution via MapReduce
Consistency concepts Methods to ensure consistency in a distributed system	Eventual Consistency	Immediate Consistency	Eventual Consistency
Foreign keys Referential integrity	no	yes	no
Transaction concepts Support to ensure data integrity after non-atomic manipulations of data	no atomic operations within a single document possible	ACID	no
Concurrency Support for concurrent manipulation of data	yes strategy: optimistic locking	yes, multi-version concurrency control (MVCC)	yes
Durability Support for making data persistent	yes	yes	yes
In-memory capabilities Is there an option to define some or all structures to be held in-memory only.	no	yes	no
User concepts Access control	Access rights for users can be defined per database	yes based on H2	Access rights for users, groups and roles based on Apache Sentry and Kerberos
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More resources
	CouchDB stands for "Cluster Of Unreliable Commodity Hardware"	H2GIS	Impala
DB-Engines blog posts	Couchbase climbs up the DB-Engines Ranking, increasing its popularity by 10% every month 2 June 2014, Matthias Gelbmann show all