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DBMS > Kdb+ vs. PostGIS vs. Quasardb

System Properties Comparison Kdb+ vs. PostGIS vs. Quasardb

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Editorial information provided by DB-Engines
NameKdb+  Xexclude from comparisonPostGIS  Xexclude from comparisonQuasardb  Xexclude from comparison
DescriptionHigh performance Time Series DBMSSpatial extension of PostgreSQLDistributed, high-performance timeseries database
Primary database modelTime Series DBMSSpatial DBMSTime Series DBMS
Secondary database modelsRelational DBMSRelational DBMS
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score8.10
Rank#55  Overall
#2  Time Series DBMS
Score32.44
Rank#27  Overall
#1  Spatial DBMS
Score0.15
Rank#293  Overall
#26  Time Series DBMS
Websitekx.compostgis.netquasardb.net
Technical documentationcode.kx.compostgis.net/­documentationdoc.quasardb.net
DeveloperKx Systems, a division of First Derivatives plcquasardb
Initial release2000 infokdb was released 2000, kdb+ in 200320052009
Current release3.6, May 20183.1.4, September 20213.1, January 2019
License infoCommercial or Open Sourcecommercial infofree 32-bit versionOpen Source infoGPL v2.0commercial infoFree community edition, Non-profit organizations and non-commercial usage are eligible for free licenses
Cloud-based only infoOnly available as a cloud servicenonono
DBaaS offerings (sponsored links) infoDatabase as a Service

Providers of DBaaS offerings, please contact us to be listed.
Implementation languageqCC++
Server operating systemsLinux
OS X
Solaris
Windows
BSD
Linux
OS X
Windows
Data schemeyesyesschema-free
Typing infopredefined data types such as float or dateyesyesyes infointeger and binary
XML support infoSome form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.yesyesno
Secondary indexesyes infotable attribute 'grouped'yesyes infowith tags
SQL infoSupport of SQLSQL-like query language (q)yesSQL-like query language
APIs and other access methodsHTTP API
JDBC
Jupyter
Kafka
ODBC
WebSocket
HTTP API
Supported programming languagesC
C#
C++
Go
J
Java
JavaScript
Lua
MatLab
Perl
PHP
Python
R
Scala
.Net
C
C#
C++
Go
Java
JavaScript (Node.js)
PHP
Python
R
Server-side scripts infoStored proceduresuser defined functionsuser defined functionsno
Triggersyes infowith viewsyesno
Partitioning methods infoMethods for storing different data on different nodeshorizontal partitioningyes infobased on PostgreSQLSharding infoconsistent hashing
Replication methods infoMethods for redundantly storing data on multiple nodesSource-replica replicationyes infobased on PostgreSQLSource-replica replication with selectable replication factor
MapReduce infoOffers an API for user-defined Map/Reduce methodsno infosimilar paradigm used for internal processingnowith Hadoop integration
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyImmediate ConsistencyImmediate Consistency
Foreign keys infoReferential integrityyesyesno
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of datanoACIDACID
Concurrency infoSupport for concurrent manipulation of datayesyesyes
Durability infoSupport for making data persistentyesyesyes infoby using LevelDB
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.yesnoyes infoTransient mode
User concepts infoAccess controlrights management via user accountsyes infobased on PostgreSQLCryptographically strong user authentication and audit trail
More information provided by the system vendor
Kdb+PostGISQuasardb
Specific characteristicsIntegrated columnar database & programming system for streaming, real time and historical...
» more
High-performance , high-speed, fully integrated timeseries database Seamlessly combines...
» more
Competitive advantagesprovides seamless scalability; runs on industry standard server platforms; is top-ranked...
» more
High performance in a cost-effective small package Real-time results for even large...
» more
Typical application scenariostick database streaming sensor data massive intelligence applications oil and gas...
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Tick database Predictive maintenance Pre-deal checks Large scale monitoring
» more
Key customersGoldman Sachs Morgan Stanley Merrill Lynch J.P. Morgan Deutsche Bank IEX Securities...
» more
Large EU investment banks US based hedge funds Orolia Tellmeplus
» more
Market metricskdb+ performance and reliability proven by our customers in critical infrastructure...
» more
Has been running in very demanding production environments since 2013 Rapid adoption...
» more
Licensing and pricing modelsupon request
» more
Community edition limited to 2 nodes and 16 GiB of storage per node available for...
» 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
Kdb+PostGISQuasardb
DB-Engines blog posts

Time Series DBMS are the database category with the fastest increase in popularity
4 July 2016, Matthias Gelbmann

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Spatial database management systems
6 April 2021, Matthias Gelbmann

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