DBMS > CouchDB vs. Dgraph vs. Ehcache

System Properties Comparison CouchDB vs. Dgraph vs. Ehcache

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Editorial information provided by DB-Engines
Name	CouchDB stands for "Cluster Of Unreliable Commodity Hardware"  Xexclude from comparison	Dgraph  Xexclude from comparison	Ehcache  Xexclude from comparison
Description	A native JSON - document store inspired by Lotus Notes, scalable from globally distributed server-clusters down to mobile phones.	Distributed and scalable native Graph DBMS	A widely adopted Java cache with tiered storage options
Primary database model	Document store	Graph DBMS	Key-value store
Secondary database models	Spatial DBMS using the Geocouch extension
DB-Engines Ranking measures the popularity of database management systems Trend Chart	Score 16.71 Rank #41   Overall #7   Document stores	Score 1.35 Rank #147   Overall #11   Graph DBMS	Score 6.52 Rank #65   Overall #8   Key-value stores
Website	couchdb.apache.org	dgraph.io	www.ehcache.org
Technical documentation	docs.couchdb.org/­en/­stable	dgraph.io/­docs	www.ehcache.org/­documentation
Developer	Apache Software Foundation Apache top-level project, originally developed by Damien Katz, a former Lotus Notes developer	Dgraph Labs, Inc.	Terracotta Inc, owned by Software AG
Initial release	2005	2016	2009
Current release	3.2.2, April 2022		3.9.6, September 2021
License Commercial or Open Source	Open Source Apache version 2	Open Source Apache 2.0	Open Source Apache Version 2; commercial licenses available
Cloud-based only Only available as a cloud service	no	no	no
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Implementation language	Erlang	Go	Java
Server operating systems	Android BSD Linux OS X Solaris Windows	Linux OS X Windows	All OS with a Java VM
Data scheme	schema-free	schema-free	schema-free
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	no
SQL Support of SQL	no	no	no
APIs and other access methods	RESTful HTTP/JSON API	GraphQL query language gRPC (using protocol buffers) API HTTP API	JCache
Supported programming languages	C C# ColdFusion Erlang Haskell Java JavaScript Lisp Lua Objective-C OCaml Perl PHP PL/SQL Python Ruby Smalltalk	C# C++ Go Java JavaScript (Node.js) PHP Python Ruby	Java
Server-side scripts Stored procedures	View functions in JavaScript	no	no
Triggers	yes	no	yes Cache Event Listeners
Partitioning methods Methods for storing different data on different nodes	Sharding improved architecture with release 2.0	yes	Sharding by using Terracotta Server
Replication methods Methods for redundantly storing data on multiple nodes	Multi-source replication Source-replica replication	Synchronous replication via Raft	yes by using Terracotta Server
MapReduce Offers an API for user-defined Map/Reduce methods	yes	no	no
Consistency concepts Methods to ensure consistency in a distributed system	Eventual Consistency	Immediate Consistency	Tunable Consistency (Strong, Eventual, Weak)
Foreign keys Referential integrity	no	no	no
Transaction concepts Support to ensure data integrity after non-atomic manipulations of data	no atomic operations within a single document possible	ACID	yes supports JTA and can work as an XA resource
Concurrency Support for concurrent manipulation of data	yes strategy: optimistic locking	yes	yes
Durability Support for making data persistent	yes	yes	yes using a tiered cache-storage approach
In-memory capabilities Is there an option to define some or all structures to be held in-memory only.	no		yes
User concepts Access control	Access rights for users can be defined per database	no Planned for future releases	no
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More resources
	CouchDB stands for "Cluster Of Unreliable Commodity Hardware"	Dgraph	Ehcache
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