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DBMS > Cachelot.io vs. DolphinDB vs. HarperDB vs. PostGIS

System Properties Comparison Cachelot.io vs. DolphinDB vs. HarperDB vs. PostGIS

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Editorial information provided by DB-Engines
NameCachelot.io  Xexclude from comparisonDolphinDB  Xexclude from comparisonHarperDB  Xexclude from comparisonPostGIS  Xexclude from comparison
DescriptionIn-memory caching systemDolphinDB 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.Ultra-low latency distributed database with an intuitive REST API supporting NoSQL and SQL (including joins). Deployment of functions and databases simultaneously with a consolidated node-level architecture.Spatial extension of PostgreSQL
Primary database modelKey-value storeTime Series DBMSDocument storeSpatial DBMS
Secondary database modelsRelational DBMSRelational DBMS
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score0.00
Rank#383  Overall
#60  Key-value stores
Score4.13
Rank#80  Overall
#6  Time Series DBMS
Score0.55
Rank#248  Overall
#38  Document stores
Score22.69
Rank#29  Overall
#1  Spatial DBMS
Websitecachelot.iowww.dolphindb.comwww.harperdb.iopostgis.net
Technical documentationdocs.dolphindb.cn/­en/­help200/­index.htmldocs.harperdb.io/­docspostgis.net/­documentation
DeveloperDolphinDB, IncHarperDB
Initial release2015201820172005
Current releasev2.00.4, January 20223.1, August 20213.4.2, February 2024
License infoCommercial or Open SourceOpen Source infoSimplified BSD Licensecommercial infofree community version availablecommercial infofree community edition availableOpen Source infoGPL v2.0
Cloud-based only infoOnly available as a cloud servicenononono
DBaaS offerings (sponsored links) infoDatabase as a Service

Providers of DBaaS offerings, please contact us to be listed.
Implementation languageC++C++Node.jsC
Server operating systemsFreeBSD
Linux
OS X
Linux
Windows
Linux
OS X
Data schemeschema-freeyesdynamic schemayes
Typing infopredefined data types such as float or datenoyesyes infoJSON data typesyes
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.nononoyes
Secondary indexesnoyesyesyes
SQL infoSupport of SQLnoSQL-like query languageSQL-like data manipulation statementsyes
APIs and other access methodsMemcached protocolJDBC
JSON over HTTP
Kafka
MQTT (Message Queue Telemetry Transport)
ODBC
OPC DA
OPC UA
RabbitMQ
WebSocket
JDBC
ODBC
React Hooks
RESTful HTTP/JSON API
WebSocket
Supported programming languages.Net
C
C++
ColdFusion
Erlang
Java
Lisp
Lua
OCaml
OCaml
Perl
PHP
Python
Ruby
C#
C++
Go
Java
JavaScript
MatLab
Python
R
Rust
.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 infoStored proceduresnoyesCustom Functions infosince release 3.1user defined functions
Triggersnononoyes
Partitioning methods infoMethods for storing different data on different nodesnonehorizontal partitioningA table resides as a whole on one (or more) nodes in a clusteryes infobased on PostgreSQL
Replication methods infoMethods for redundantly storing data on multiple nodesnoneyesyes infothe nodes on which a table resides can be definedyes infobased on PostgreSQL
MapReduce infoOffers an API for user-defined Map/Reduce methodsnoyesnono
Consistency concepts infoMethods to ensure consistency in a distributed systemnoneImmediate ConsistencyImmediate ConsistencyImmediate Consistency
Foreign keys infoReferential integritynononoyes
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of datanoyesAtomic execution of specific operationsACID
Concurrency infoSupport for concurrent manipulation of datayesyesyesyes
Durability infoSupport for making data persistentnoyesyes, using LMDByes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.noyesyesno
User concepts infoAccess controlnoAdministrators, Users, GroupsAccess rights for users and rolesyes infobased on PostgreSQL

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More resources
Cachelot.ioDolphinDBHarperDBPostGIS
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