DBMS > DolphinDB vs. LokiJS

System Properties Comparison DolphinDB vs. LokiJS

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Editorial information provided by DB-Engines
Name	DolphinDB  Xexclude from comparison	LokiJS  Xexclude from comparison
Description	DolphinDB is a high performance Time Series DBMS. It is integrated with an easy-to-use fully featured programming language and a high-volume high-velocity streaming analytics system. It offers operational simplicity, scalability, fault tolerance, and concurrency.	In-memory JavaScript DBMS
Primary database model	Time Series DBMS	Document store
Secondary database models	Relational DBMS
DB-Engines Ranking measures the popularity of database management systems Trend Chart	Score 1.65 Rank #139   Overall #9   Time Series DBMS	Score 0.57 Rank #226   Overall #34   Document stores
Website	www.dolphindb.com	github.com/­techfort/­LokiJS
Technical documentation	www.dolphindb.com/­help	techfort.github.io/­LokiJS
Developer	DolphinDB, Inc
Initial release	2018	2014
Current release	v2.00.4, January 2022
License Commercial or Open Source	commercial free community version available	Open Source
Cloud-based only Only available as a cloud service	no	no
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Implementation language	C++	JavaScript
Server operating systems	Linux Windows	server-less, requires a JavaScript environment (browser, Node.js)
Data scheme	yes	schema-free
Typing predefined data types such as float or date	yes	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	yes via views
SQL Support of SQL	SQL-like query language	no
APIs and other access methods	JDBC JSON over HTTP Kafka MQTT (Message Queue Telemetry Transport) ODBC OPC DA OPC UA RabbitMQ WebSocket	JavaScript API
Supported programming languages	C# C++ Go Java JavaScript MatLab Python R Rust	JavaScript
Server-side scripts Stored procedures	yes	View functions in JavaScript
Triggers	no	yes
Partitioning methods Methods for storing different data on different nodes	horizontal partitioning	none
Replication methods Methods for redundantly storing data on multiple nodes	yes	none
MapReduce Offers an API for user-defined Map/Reduce methods	yes	yes
Consistency concepts Methods to ensure consistency in a distributed system	Immediate Consistency	none
Foreign keys Referential integrity	no	no
Transaction concepts Support to ensure data integrity after non-atomic manipulations of data	yes	no atomic operations within a single collection possible
Concurrency Support for concurrent manipulation of data	yes
Durability Support for making data persistent	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	yes
User concepts Access control	Administrators, Users, Groups	no
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