DBMS > Alibaba Cloud AnalyticDB for PostgreSQL vs. searchxml vs. TerarkDB vs. VelocityDB

System Properties Comparison Alibaba Cloud AnalyticDB for PostgreSQL vs. searchxml vs. TerarkDB vs. VelocityDB

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Name	Alibaba Cloud AnalyticDB for PostgreSQL former name was HybridDB  Xexclude from comparison	searchxml  Xexclude from comparison	TerarkDB  Xexclude from comparison	VelocityDB  Xexclude from comparison
Description	An online MPP (Massively Parallel Processing) data warehousing service based on Greenplum	DBMS for structured and unstructured content wrapped with an application server	A key-value store forked from RocksDB with advanced compression algorithms. It can be used standalone or as a storage engine for MySQL and MongoDB	A .NET Object Database that can be embedded/distributed and extended to a graph data model (VelocityGraph)
Primary database model	Relational DBMS	Native XML DBMS Search engine	Key-value store	Graph DBMS Object oriented DBMS
DB-Engines Ranking measures the popularity of database management systems Trend Chart	Score 0.76 Rank #220   Overall #102   Relational DBMS	Score 0.03 Rank #390   Overall #7   Native XML DBMS #24   Search engines	Score 0.08 Rank #367   Overall #56   Key-value stores	Score 0.11 Rank #354   Overall #37   Graph DBMS #15   Object oriented DBMS
Website	www.alibabacloud.com/­product/­hybriddb-postgresql	www.searchxml.net/­category/­products	github.com/­bytedance/­terarkdb	velocitydb.com
Technical documentation	www.alibabacloud.com/­help/­en/­analyticdb-for-postgresql/­latest/­product-introduction-overview	www.searchxml.net/­support/­handouts	bytedance.larkoffice.com/­docs/­doccnZmYFqHBm06BbvYgjsHHcKc	velocitydb.com/­UserGuide
Developer	Alibaba / Pivotal Software Inc. / PostgreSQL Global Development Group	informationpartners gmbh	ByteDance, originally Terark	VelocityDB Inc
Initial release	2016	2015	2016	2011
Current release		1.0		7.x
License Commercial or Open Source	commercial	commercial	commercial restricted open source version available	commercial
Cloud-based only Only available as a cloud service	yes	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++	C#
Server operating systems	hosted	Windows		Any that supports .NET
Data scheme	yes	schema-free	schema-free	yes
Typing predefined data types such as float or date	yes	yes	no	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.	yes	yes	no	no
Secondary indexes	yes	yes	no	yes
SQL Support of SQL	yes	no	no	no
APIs and other access methods	JDBC ODBC	RESTful HTTP API WebDAV XQuery XSLT	C++ API Java API	.Net
Supported programming languages	C Java Perl Python R	C++ most other programming languages supported via APIs	C++ Java	.Net
Server-side scripts Stored procedures	yes	yes on the application server	no	no
Triggers	yes	no	no	Callbacks are triggered when data changes
Partitioning methods Methods for storing different data on different nodes	Sharding Implicit feature of the cloud service	none	none	Sharding
Replication methods Methods for redundantly storing data on multiple nodes	yes Implicit feature of the cloud service	yes sychronisation to multiple collections	none
MapReduce Offers an API for user-defined Map/Reduce methods	no	no	no	no
Consistency concepts Methods to ensure consistency in a distributed system	Immediate Consistency	Immediate Consistency		Immediate Consistency
Foreign keys Referential integrity	yes	no	no	no
Transaction concepts Support to ensure data integrity after non-atomic manipulations of data	ACID	multiple readers, single writer	no	ACID
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.	no	no	yes	yes
User concepts Access control	fine grained access rights according to SQL-standard	Domain, group and role-based access control at the document level and for application services	no	Based on Windows Authentication
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More resources
	Alibaba Cloud AnalyticDB for PostgreSQL former name was HybridDB	searchxml	TerarkDB	VelocityDB
Recent citations in the news	Alibaba Cloud upgrades AnalyticDB with vector database engine 25 July 2023, CloudTech News Two Critical Flaws Found in Alibaba Cloud's PostgreSQL Databases 20 April 2023, The Hacker News Accidental ‘write’ Permissions In Alibaba PostgreSQL Let Attackers Access Sensitive Data 22 April 2023, GBHackers Two critical vulnerabilities spotted in Alibaba Cloud's PostgreSQL databases 21 April 2023, TEISS How Data Analytics Capabilities of Alibaba Group Evolve Its Ecosystem to the Cloud 20 February 2021, DataDrivenInvestor provided by Google News		A Chinese company is making the cloud 200x faster · TechNode 3 July 2017, TechNode provided by Google News

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