DBMS > DolphinDB vs. Postgres-XL vs. SAP Advantage Database Server vs. SiteWhere

System Properties Comparison DolphinDB vs. Postgres-XL vs. SAP Advantage Database Server vs. SiteWhere

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Editorial information provided by DB-Engines
Name	DolphinDB  Xexclude from comparison	Postgres-XL  Xexclude from comparison	SAP Advantage Database Server former name: Sybase ADS  Xexclude from comparison	SiteWhere  Xexclude from comparison
			SAP Advantage Database Server seems to be discontinued. Therefore it is excluded from the DB-Engines Ranking.
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.	Based on PostgreSQL enhanced with MPP and write-scale-out cluster features	Low-cost RDBMS with access to ISAM and FoxPro data structures	M2M integration platform for persisting/querying time series data
Primary database model	Time Series DBMS	Relational DBMS	Relational DBMS	Time Series DBMS
Secondary database models	Relational DBMS	Document store Spatial DBMS
DB-Engines Ranking measures the popularity of database management systems Trend Chart	Score 4.03 Rank #78   Overall #6   Time Series DBMS	Score 0.53 Rank #254   Overall #117   Relational DBMS		Score 0.06 Rank #383   Overall #43   Time Series DBMS
Website	www.dolphindb.com	www.postgres-xl.org	www.sap.com/products/advantage-database-server.html	github.com/­sitewhere/­sitewhere
Technical documentation	docs.dolphindb.cn/­en/­help200/­index.html	www.postgres-xl.org/­documentation		sitewhere1.sitewhere.io/­index.html
Developer	DolphinDB, Inc		Sybase, SAP	SiteWhere
Initial release	2018	2014 since 2012, originally named StormDB	1993	2010
Current release	v2.00.4, January 2022	10 R1, October 2018
License Commercial or Open Source	commercial free community version available	Open Source Mozilla public license	commercial	Open Source Common Public Attribution License Version 1.0
Cloud-based only Only available as a cloud service	no	no	no	no
DBaaS offerings (sponsored links) Database as a Service Providers of DBaaS offerings, please contact us to be listed.
Implementation language	C++	C		Java
Server operating systems	Linux Windows	Linux macOS	Linux Windows	Linux OS X Windows
Data scheme	yes	yes	yes	predefined scheme
Typing predefined data types such as float or date	yes	yes	yes	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.	no	yes XML type, but no XML query functionality	no	no
Secondary indexes	yes	yes	yes	no
SQL Support of SQL	SQL-like query language	yes distributed, parallel query execution	yes	no
APIs and other access methods	JDBC JSON over HTTP Kafka MQTT (Message Queue Telemetry Transport) ODBC OPC DA OPC UA RabbitMQ WebSocket	ADO.NET JDBC native C library ODBC streaming API for large objects	.NET Client API ADO.NET JDBC ODBC OLE DB	HTTP REST
Supported programming languages	C# C++ Go Java JavaScript MatLab Python R Rust	.Net C C++ Delphi Erlang Java JavaScript (Node.js) Perl PHP Python Tcl	Delphi Perl PHP
Server-side scripts Stored procedures	yes	user defined functions	yes
Triggers	no	yes	yes
Partitioning methods Methods for storing different data on different nodes	horizontal partitioning	horizontal partitioning	none	Sharding based on HBase
Replication methods Methods for redundantly storing data on multiple nodes	yes		Multi-source replication CONFLICT Trigger to resolve replication conflicts Source-replica replication	selectable replication factor based on HBase
MapReduce Offers an API for user-defined Map/Reduce methods	yes	no	no	no
Consistency concepts Methods to ensure consistency in a distributed system	Immediate Consistency	Immediate Consistency	Immediate Consistency	Immediate Consistency
Foreign keys Referential integrity	no	yes	yes	no
Transaction concepts Support to ensure data integrity after non-atomic manipulations of data	yes	ACID MVCC	ACID	no
Concurrency Support for concurrent manipulation of data	yes	yes	yes	yes
Durability Support for making data persistent	yes	yes	yes	yes
In-memory capabilities Is there an option to define some or all structures to be held in-memory only.	yes	no	no caching of (temporary) tables can be configured	no
User concepts Access control	Administrators, Users, Groups	fine grained access rights according to SQL-standard	fine grained access rights according to SQL-standard	Users with fine-grained authorization concept
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More resources
	DolphinDB	Postgres-XL	SAP Advantage Database Server former name: Sybase ADS	SiteWhere
Recent citations in the news			SAP Announces Q3 2023 Results: Asia Pacific and Japan View 19 October 2023, SAP News provided by Google News	SiteWhere: An open platform for connected devices 11 July 2017, Open Source For You Ten Popular IoT Platforms You Should be Aware of 27 March 2023, Open Source For You 11 Best Open source IoT Platforms To Develop Smart Projects 9 March 2023, H2S Media provided by Google News

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