DBMS > EJDB vs. HarperDB vs. Yaacomo

System Properties Comparison EJDB vs. HarperDB vs. Yaacomo

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Editorial information provided by DB-Engines

Name

Description

Embeddable document-store database library with JSON representation of queries (in MongoDB style)

A distributed database focused on speed and ease of use. It has an intuitive REST API, and supports NoSQL and SQL including joins. HarperDB leverages standard interfaces, and users can be up and running in minutes.

OpenCL based in-memory RDBMS, designed for efficiently utilizing the hardware via parallel computing

Primary database model

Document store

Relational DBMS

DB-Engines Ranking measures the popularity of database management systems
Trend Chart

Score	0.10
Rank	#314	Overall
	#41	Document stores

Score	0.52
Rank	#238	Overall
	#37	Document stores

Score	0.00
Rank	#354	Overall
	#152	Relational DBMS

Website

ejdb.org

harperdb.io

yaacomo.com

Technical documentation

github.com/Softmotions/ejdb/blob/master/README.md

harperdb.io/developers/documentation/overview

Developer

Softmotions

HarperDB

Q2WEB GmbH

Initial release

2012

2017

2009

Current release

3.1, August 2021

License

Commercial or Open Source

Open Source

GPLv2

commercial

free community edition available

commercial

Cloud-based only

Only available as a cloud service

DBaaS offerings (sponsored links)

Database as a Service

Providers of DBaaS offerings, please contact us to be listed.

Implementation language

Node.js

Server operating systems

server-less

Linux
OS X

Android
Linux
Windows

Data scheme

schema-free

dynamic schema

yes

Typing

predefined data types such as float or date

yes

string, integer, double, bool, date, object_id

yes

JSON data types

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.

Secondary indexes

yes

SQL

Support of SQL

SQL-like data manipulation statements

yes

APIs and other access methods

in-process shared library

JDBC
ODBC
React Hooks
RESTful HTTP/JSON API
WebSocket

JDBC
ODBC

Supported programming languages

Actionscript
C
C#
C++
Go
Java
JavaScript (Node.js)
Lua
Objective-C
Pike
Python
Ruby

.Net
C
C#
C++
ColdFusion
D
Dart
Delphi
Erlang
Go
Haskell
Java
JavaScript (Node.js)
Lisp
MatLab
Objective C
Perl
PHP
PowerShell
Prolog
Python
R
Ruby
Rust
Scala
Swift

Server-side scripts

Stored procedures

Custom Functions

since release 3.1

Triggers

yes

Partitioning methods

Methods for storing different data on different nodes

none

A table resides as a whole on one (or more) nodes in a cluster

horizontal partitioning

Replication methods

Methods for redundantly storing data on multiple nodes

none

yes

the nodes on which a table resides can be defined

Source-replica replication

MapReduce

Offers an API for user-defined Map/Reduce methods

Consistency concepts

Methods to ensure consistency in a distributed system

Immediate Consistency

Foreign keys

Referential integrity

typically not needed, however similar functionality with collection joins possible

yes

Transaction concepts

Support to ensure data integrity after non-atomic manipulations of data

Atomic execution of specific operations

ACID

Concurrency

Support for concurrent manipulation of data

yes

Read/Write Locking

yes

Durability

Support for making data persistent

yes

yes, using LMDB

yes

In-memory capabilities

Is there an option to define some or all structures to be held in-memory only.

yes

User concepts

Access control

Access rights for users and roles

fine grained access rights according to SQL-standard

More information provided by the system vendor

Specific characteristics

HarperDB is the first distributed database with hybrid SQL & NoSQL functionality...
» more

Competitive advantages

By combining the functionality of the best SQL, NoSQL, and NewSQL products on the...
» more

Typical application scenarios

Use cases where HarperDB is a better fit than other solutions include: Rapid app...
» more

Key customers

A few highlighted customers include: US Army, US Airforce, Chelan PUD, TATA, & Lumen....
» more

Market metrics

Over 26K total HarperDB users : 12,700+ npm downloads 10,000+ on Docker Hub 3,400+...
» more

Licensing and pricing models

HarperDB follows a freemium/premium model . A data base is only as powerful as it...
» more

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and for displaying vendor-provided information such as key customers, competitive advantages and market metrics.

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More resources

Recent citations in the news

Jaxon Repp on HarperDB Distributed Database Platform
23 March 2022, InfoQ.com

HarperDB Releases HarperDB Cloud
22 April 2020, PR Newswire

Database Management Software Market Size, Trends and Forecast to 2029 | RingLead, MongoDB, Redis Enterprise, SingleStore.com, Teradata Vantage, SAP HANA, HarperDB, Couchbase Server, Worksheet Systems, Confluent Platform. – SMU Daily Musta
14 May 2022, SMU Daily Mustang

Build a Hacker News Clone using React and HarperDB
18 October 2021, SitePoint

HarperDB: An underdog SQL / NoSQL database
7 February 2018, ZDNet

provided by Google News

Job opportunities

Sales & Customer Success Engineer
HarperDB, Denver, CO

VP Engineering
HarperDB, Denver, CO

Cloud Platform Software Engineer
HarperDB, Denver, CO

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