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DBMS > CouchDB vs. Firebase Realtime Database vs. IBM Db2

System Properties Comparison CouchDB vs. Firebase Realtime Database vs. IBM Db2

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Editorial information provided by DB-Engines
NameCouchDB infostands for "Cluster Of Unreliable Commodity Hardware"  Xexclude from comparisonFirebase Realtime Database  Xexclude from comparisonIBM Db2 infoformerly named DB2 or IBM Database 2  Xexclude from comparison
DescriptionA native JSON - document store inspired by Lotus Notes, scalable from globally distributed server-clusters down to mobile phones.Cloud-hosted realtime document store. iOS, Android, and JavaScript clients share one Realtime Database instance and automatically receive updates with the newest data.Common in IBM host environments, 2 different versions for host and Windows/Linux
Primary database modelDocument storeDocument storeRelational DBMS infoSince Version 10.5 support for JSON/BSON documents compatible with MongoDB
Secondary database modelsDocument store
RDF store infoin DB2 LUW (Linux, Unix, Windows)
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score19.22
Rank#33  Overall
#5  Document stores
Score10.85
Rank#41  Overall
#7  Document stores
Score172.20
Rank#6  Overall
#5  Relational DBMS
Websitecouchdb.apache.orgfirebase.google.com/­products/­realtime-databasewww.ibm.com/­analytics/­us/­en/­db2
Technical documentationwiki.apache.org/­couchdbfirebase.google.com/­docs/­databasewww.ibm.com/­support/­knowledgecenter/­SSEPGG
DeveloperApache Software Foundation infoApache top-level project, originally developed by Damien Katz, a former Lotus Notes developerGoogle infoacquired by Google 2014IBM
Initial release200520121983 infohost version
Current release2.3.1, March 201912.1, October 2016
License infoCommercial or Open SourceOpen Source infoApache version 2commercialcommercial infofree version is available
Cloud-based only infoOnly available as a cloud servicenoyesno
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageErlangC and C++
Server operating systemsAndroid
BSD
Linux
OS X
Solaris
Windows
hostedAIX
HP-UX
Linux
Solaris
Windows
z/OS
Data schemeschema-freeschema-freeyes
Typing infopredefined data types such as float or datenoyesyes
XML support infoSome form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.nono
Secondary indexesyes infovia viewsyesyes
SQL infoSupport of SQLnonoyes
APIs and other access methodsRESTful HTTP/JSON APIAndroid
iOS
JavaScript API
RESTful HTTP API
JSON style queries infoMongoDB 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
Java
JavaScript
Objective-C
C
C#
C++
Cobol
Delphi
Fortran
Java
Perl
PHP
Python
Ruby
Visual Basic
Server-side scripts infoStored proceduresView functions in JavaScriptlimited functionality with using 'rules'yes
TriggersyesCallbacks are triggered when data changesyes
Partitioning methods infoMethods for storing different data on different nodesSharding infoimproved architecture with release 2.0Sharding infoonly with Windows/Unix/Linux Version
Replication methods infoMethods for redundantly storing data on multiple nodesMaster-master replication
Master-slave replication
yes infowith separate tools (MQ, InfoSphere)
MapReduce infoOffers an API for user-defined Map/Reduce methodsyesnono
Consistency concepts infoMethods to ensure consistency in a distributed systemEventual ConsistencyEventual Consistency infoif the client is offline
Immediate Consistency infoif the client is online
Foreign keys infoReferential integritynonoyes
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of datano infoatomic operations within a single document possibleyesACID
Concurrency infoSupport for concurrent manipulation of datayes infostrategy: optimistic lockingyesyes
Durability infoSupport for making data persistentyesyesyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.no
User concepts infoAccess controlAccess rights for users can be defined per databaseyes, based on authentication and database rulesfine grained access rights according to SQL-standard

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More resources
CouchDB infostands for "Cluster Of Unreliable Commodity Hardware"Firebase Realtime DatabaseIBM Db2 infoformerly named DB2 or IBM Database 2
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Conferences and events

IDUG Db2 Tech Conference Europe 2019
Rotterdam, Netherlands, 29-24 October 2019

Recent citations in the news

How to create your first CouchDB database with Fauxton
8 May 2019, TechRepublic

How to install CouchDB on CentOS 7
30 April 2019, TechRepublic

Growing Awareness about of NoSQL Databases Software Market Growth of CAGR with Focusing Key players like MongoDB, Amazon, ArangoDB, Azure Cosmos DB, Couchbase, MarkLogic, RethinkDB, CouchDB, SQL-RD, OrientDB, RavenDB, Redis, etc
18 June 2019, Amazing Newspaper

Percona XtraDB and MongoDB Operators for Kubernetes
7 June 2019, InfoQ.com

A Pokemon Crash Course on CouchDB
11 August 2016, SitePoint

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How unsecured Firebase databases put critical data at risk
16 January 2019, TechTarget

Realtime vs Cloud Firestore: Which Firebase Database to go?
12 October 2018, Appinventiv

Google’s Cloud Firestore NoSQL database hits general availability
31 January 2019, TechCrunch

How was Google Firebase security bypassed?
9 October 2018, TechTarget

Firebase for Startups: A Must-Have or Non-Essential
23 January 2019, Appinventiv

provided by Google News

IBM Injects 'Data Science' AI Into Its Db2 Database
4 June 2019, Forbes

IBM Db2 Joins the AI Age
4 June 2019, InformationWeek

Db2 – gateway to the future
9 June 2019, Toolbox

The Demise of the DBA
17 June 2019, Database Journal

IBM Brings Active-Active Mirroring Into Db2 For i Database
24 April 2019, IT Jungle

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