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DBMS > CouchDB vs. TerminusDB vs. VelocityDB

System Properties Comparison CouchDB vs. TerminusDB vs. VelocityDB

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Editorial information provided by DB-Engines
NameCouchDB infostands for "Cluster Of Unreliable Commodity Hardware"  Xexclude from comparisonTerminusDB infoformer name was DataChemist  Xexclude from comparisonVelocityDB  Xexclude from comparison
DescriptionA native JSON - document store inspired by Lotus Notes, scalable from globally distributed server-clusters down to mobile phones.Scalable Graph Database platform making enterprise data available by exploiting inferred entities and relationshipsA .NET Object Database that can be embedded/distributed and extended to a graph data model (VelocityGraph)
Primary database modelDocument storeGraph DBMSGraph DBMS
Object oriented DBMS
Secondary database modelsDocument store
RDF store
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score18.04
Rank#34  Overall
#5  Document stores
Score0.02
Rank#342  Overall
#32  Graph DBMS
Score0.07
Rank#311  Overall
#30  Graph DBMS
#16  Object oriented DBMS
Websitecouchdb.apache.orgterminusdb.comvelocitydb.com
Technical documentationdocs.couchdb.org/­en/­stableterminusdb.com/­docsvelocitydb.com/­UserGuide
DeveloperApache Software Foundation infoApache top-level project, originally developed by Damien Katz, a former Lotus Notes developerDataChemist Ltd.VelocityDB Inc
Initial release200520182011
Current release2.3.1, March 20191.0, 20187.x
License infoCommercial or Open SourceOpen Source infoApache version 2Open Source infoGPL V3commercial
Cloud-based only infoOnly available as a cloud servicenonono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageErlangProlog, RustC#
Server operating systemsAndroid
BSD
Linux
OS X
Solaris
Windows
LinuxAny that supports .NET
Data schemeschema-freeyesyes
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.nonono
Secondary indexesyes infovia viewsyes
SQL infoSupport of SQLnoSQL-like query language (WOQL)no
APIs and other access methodsRESTful HTTP/JSON APIOWL
RESTful HTTP API
WOQL (Web Object Query Language)
.Net
Supported programming languagesC
C#
ColdFusion
Erlang
Haskell
Java
JavaScript
Lisp
Lua
Objective-C
OCaml
Perl
PHP
PL/SQL
Python
Ruby
Smalltalk
JavaScript
Python
.Net
Server-side scripts infoStored proceduresView functions in JavaScriptyesno
TriggersyesyesCallbacks are triggered when data changes
Partitioning methods infoMethods for storing different data on different nodesSharding infoimproved architecture with release 2.0Graph PartitioningSharding
Replication methods infoMethods for redundantly storing data on multiple nodesMaster-master replication
Master-slave replication
Journaling Streams
MapReduce infoOffers an API for user-defined Map/Reduce methodsyesnono
Consistency concepts infoMethods to ensure consistency in a distributed systemEventual ConsistencyImmediate Consistency
Foreign keys infoReferential integritynoyesno
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of datano infoatomic operations within a single document possibleACIDACID
Concurrency infoSupport for concurrent manipulation of datayes infostrategy: optimistic lockingyesyes
Durability infoSupport for making data persistentyesyes infoin-memory journalingyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.noyes
User concepts infoAccess controlAccess rights for users can be defined per databaseRole-based access controlBased on Windows Authentication

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More resources
CouchDB infostands for "Cluster Of Unreliable Commodity Hardware"TerminusDB infoformer name was DataChemistVelocityDB
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IBM Adds Kubernetes Operator for CouchDB
26 September 2019, Datanami

IBM Adds Support and Kubernetes Operator for Apache CouchDB to Sync Data Across Multi-Cloud Environments
30 September 2019, Database Trends and Applications

IBM Announces Kubernetes Operator for Apache CouchDB to Enhance Adoption of Hybrid Cloud
27 September 2019, Toolbox

IBM brings blockchain to Red Hat OpenShift
27 September 2019, Corporate IT

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

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