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DBMS > CouchDB vs. DB2

System Properties Comparison CouchDB vs. DB2

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Editorial information provided by DB-Engines
NameCouchDB stands for "Cluster Of Unreliable Commodity Hardware"  Xexclude from comparisonDB2  Xexclude from comparison
DescriptionA document store inspired by Lotus NotesCommon in IBM host environments, 2 different versions for host and Windows/Linux
Database modelDocument storeRelational DBMS Since Version 10.5 support for JSON/BSON documents compatible with MongoDB
DB-Engines Ranking measures the popularity of database management systems
Trend Chart
Score21.00
Rank#26  Overall
#4  Document stores
Score185.08
Rank#6  Overall
#5  Relational DBMS
Websitecouchdb.apache.orgibm.com/­software/­data/­db2
Technical documentationwiki.apache.org/­couchdbwww.ibm.com/­support/­entry/­portal/­documentation/­software/­information_management
DeveloperApache Software Foundation Apache top-level project, originally developed by Damien Katz, a former Lotus Notes developerIBM
Initial release20051983 host version
Current release1.6.1, September 2014DB2 Data Server (11.1), April 2016
LicenseOpen Source Apache version 2commercial free version is available
Database as a Service (DBaaS) Only available as a cloud servicenono
Implementation languageErlangC and C++
Server operating systemsAndroid
BSD
Linux
OS X
Solaris
Windows
Linux
Unix
Windows
z/OS
Data schemeschema-freeyes
Typing predefined data types such as float or datenoyes
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
Secondary indexesyes via viewsyes
SQL Support of (almost full) SQL standard (DML, DDL and DCL statements)noyes
APIs and other access methodsRESTful HTTP/JSON APIJSON style queries MongoDB compatible
XQuery
ADO.NET
JDBC
ODBC
Supported programming languagesC
C#
ColdFusion
Erlang
Haskell
Java
JavaScript
Lisp
Lua
Objective-C
OCaml
Perl
PHP
PL/SQL
Python
Ruby
Smalltalk
C
C#
C++
Cobol
Delphi
Fortran
Java
Perl
PHP
Python
Ruby
Visual Basic
Server-side scripts Stored proceduresView functions in JavaScriptyes
Triggersyesyes
Partitioning methods Methods for storing different data on different nodesSharding with a proxy-based framework, named couchdb-loungeSharding only with Windows/Unix/Linux Version
Replication methods Methods for redundantly storing data on multiple nodesMaster-master replication
Master-slave replication
yes with separate tools (MQ, InfoSphere)
MapReduce Offers an API for user-defined Map/Reduce methodsyesno
Consistency concepts Methods to ensure consistency in a distributed systemEventual Consistency
Foreign keys Referential integritynoyes
Transaction concepts Support to ensure data integrity after non-atomic manipulations of datano atomic operations within a single document possibleACID
Concurrency Support for concurrent manipulation of datayes strategy: optimistic lockingyes
Durability Support for making data persistentyesyes
In-memory capabilities Is there an option to define some or all structures to be held in-memory only.no
User concepts Access controlAccess rights for users can be defined per databasefine grained access rights according to SQL-standard

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More resources
CouchDB stands for "Cluster Of Unreliable Commodity Hardware"DB2
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