DBMS > Dgraph vs. EJDB vs. LokiJS

System Properties Comparison Dgraph vs. EJDB vs. LokiJS

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Editorial information provided by DB-Engines
Name	Dgraph  Xexclude from comparison	EJDB  Xexclude from comparison	LokiJS  Xexclude from comparison
Description	Distributed and scalable native Graph DBMS	Embeddable document-store database library with JSON representation of queries (in MongoDB style)	In-memory JavaScript DBMS
Primary database model	Graph DBMS	Document store	Document store
DB-Engines Ranking measures the popularity of database management systems Trend Chart	Score 1.38 Rank #145   Overall #11   Graph DBMS	Score 0.09 Rank #317   Overall #42   Document stores	Score 0.57 Rank #226   Overall #34   Document stores
Website	dgraph.io	ejdb.org	github.com/­techfort/­LokiJS
Technical documentation	dgraph.io/­docs	github.com/­Softmotions/­ejdb/­blob/­master/­README.md	techfort.github.io/­LokiJS
Developer	Dgraph Labs, Inc.	Softmotions
Initial release	2016	2012	2014
License Commercial or Open Source	Open Source Apache 2.0	Open Source GPLv2	Open Source
Cloud-based only Only available as a cloud service	no	no	no
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Implementation language	Go	C	JavaScript
Server operating systems	Linux OS X Windows	server-less	server-less, requires a JavaScript environment (browser, Node.js)
Data scheme	schema-free	schema-free	schema-free
Typing predefined data types such as float or date	yes	yes string, integer, double, bool, date, object_id	no
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
Secondary indexes	yes	no	yes via views
SQL Support of SQL	no	no	no
APIs and other access methods	GraphQL query language gRPC (using protocol buffers) API HTTP API	in-process shared library	JavaScript API
Supported programming languages	C# C++ Go Java JavaScript (Node.js) PHP Python Ruby	Actionscript C C# C++ Go Java JavaScript (Node.js) Lua Objective-C Pike Python Ruby	JavaScript
Server-side scripts Stored procedures	no	no	View functions in JavaScript
Triggers	no	no	yes
Partitioning methods Methods for storing different data on different nodes	yes	none	none
Replication methods Methods for redundantly storing data on multiple nodes	Synchronous replication via Raft	none	none
MapReduce Offers an API for user-defined Map/Reduce methods	no	no	yes
Consistency concepts Methods to ensure consistency in a distributed system	Immediate Consistency		none
Foreign keys Referential integrity	no	no typically not needed, however similar functionality with collection joins possible	no
Transaction concepts Support to ensure data integrity after non-atomic manipulations of data	ACID	no	no atomic operations within a single collection possible
Concurrency Support for concurrent manipulation of data	yes	yes Read/Write Locking
Durability Support for making data persistent	yes	yes	yes Serialization of a DB in a Node.JS/Cordova/PhoneGap environment. Usage of the IndexedDB-API in a browser.
In-memory capabilities Is there an option to define some or all structures to be held in-memory only.			yes
User concepts Access control	no Planned for future releases	no	no
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	Dgraph	EJDB	LokiJS
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