DBMS > Apache Druid vs. EventStoreDB vs. Oracle Rdb vs. Quasardb

System Properties Comparison Apache Druid vs. EventStoreDB vs. Oracle Rdb vs. Quasardb

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Editorial information provided by DB-Engines

Name

Description

Open-source analytics data store designed for sub-second OLAP queries on high dimensionality and high cardinality data

Industrial-strength, open-source database solution built from the ground up for event sourcing.

Distributed, high-performance timeseries database

Primary database model

Relational DBMS
Time Series DBMS

Event Store

Relational DBMS

Time Series DBMS

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

Score	3.29
Rank	#95	Overall
	#49	Relational DBMS
	#7	Time Series DBMS

Score	1.14
Rank	#181	Overall
	#1	Event Stores

Score	1.08
Rank	#187	Overall
	#85	Relational DBMS

Score	0.19
Rank	#327	Overall
	#30	Time Series DBMS

Website

druid.apache.org

www.eventstore.com

www.oracle.com/database/technologies/related/rdb.html

quasar.ai

Technical documentation

druid.apache.org/docs/latest/design

developers.eventstore.com

www.oracle.com/database/technologies/related/rdb-doc.html

doc.quasar.ai/master

Developer

Apache Software Foundation and contributors

Event Store Limited

Oracle, originally developed by Digital Equipment Corporation (DEC)

quasardb

Initial release

2012

1984

2009

Current release

29.0.1, April 2024

21.2, February 2021

7.4.1.1, 2021

3.14.1, January 2024

License

Commercial or Open Source

Open Source

Apache license v2

Open Source

commercial

Free community edition, Non-profit organizations and non-commercial usage are eligible for free licenses

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

Java

C++

Server operating systems

Linux
OS X
Unix

Linux
Windows

HP Open VMS

BSD
Linux
OS X
Windows

Data scheme

yes

schema-less columns are supported

Flexible Schema (defined schema, partial schema, schema free)

schema-free

Typing

predefined data types such as float or date

yes

integer and binary

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

with tags

SQL

Support of SQL

SQL for querying

yes

SQL-like query language

APIs and other access methods

JDBC
RESTful HTTP/JSON API

HTTP API

Supported programming languages

Clojure
JavaScript
PHP
Python
R
Ruby
Scala

.Net
C
C#
C++
Go
Java
JavaScript (Node.js)
PHP
Python
R

Server-side scripts

Stored procedures

Triggers

Partitioning methods

Methods for storing different data on different nodes

Sharding

manual/auto, time-based

Sharding

consistent hashing

Replication methods

Methods for redundantly storing data on multiple nodes

yes, via HDFS, S3 or other storage engines

Source-replica replication with selectable replication factor

MapReduce

Offers an API for user-defined Map/Reduce methods

with Hadoop integration

Consistency concepts

Methods to ensure consistency in a distributed system

Immediate Consistency

Foreign keys

Referential integrity

yes

Transaction concepts

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

yes, on a single node

ACID

Concurrency

Support for concurrent manipulation of data

yes

Durability

Support for making data persistent

yes

by using LevelDB

In-memory capabilities

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

yes

Transient mode

User concepts

Access control

RBAC using LDAP or Druid internals for users and groups for read/write by datasource and system

Cryptographically strong user authentication and audit trail

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