适用于PolarDB的阿里云ApsaraDB和AllegroGraph之间的区别

1.适用于PolarDB的阿里云ApsaraDB：
它是与MySQL，PostgreSQL和Oracle兼容的云原生关系数据库。 ApsaraDB体系结构在单个群集中支持5000台物理机。它是为需要快速性能，高并发性和自动伸缩的关键业务数据库应用程序而设计的。

2. AllegroGraph：
它是一种高性能的持久性RDF存储，具有对Graph DBMS的附加支持。它用作文档存储，旨在以JSON-LD格式存储，检索和管理面向文档的信息。 AllegroGraph的第一个版本于2004年发布。适用于PolarDB的阿里云ApsaraDB和AllegroGraph之间的区别：

S.NO.	Alibaba Cloud ApsaraDB for PolarDB	ALLEGROGRAPH
1.	It was developed by Alibaba in August 2013.	It was developed by Franz Inc. in 2004.
2.	It is a cloud-native relational database compatible with MySQL, PostgreSQL, and Oracle.	It is a high performance, persistent RDF store with additional support for Graph DBMS.
3.	In Alibaba Cloud ApsaraDB for PolarDB there are hosted server operating systems.	Server operating systems for AllegroGraph are Linux, OS X and Windows.
4.	The license of Alibaba Cloud ApsaraDB for PolarDB is commercial.	The license of AllegroGraph is also commercial.
5.	It supports XML Format.	It does not support XML Format.
6.	It supports the Server-side scripting	It support the Server-side scripting with JavaScript or Common Lisp.
7.	There is only one partitioning method – Sharding.	The partitioning can be done with Federation.
8.	It supports SQL query language.	It uses SPARQL as query language.
9.	It supports replication methods.	It support two replication methods : Master-Slave Replication and Multi-Master Replication.
10.	ApsaraDB for PolarDB provides the concept of Referential Integrity. Hence, there are Foreign Keys.	AllegroGraph does not provide the concept of Referential Integrity. Hence, no Foreign Keys.
11.	It supports in-memory capabilities.	It does not support in-memory capabilities.
12.	It does not offer any API for user-defined Map/Reduce methods.	It also does not offer any API for user-defined Map/Reduce methods.
13.	It is available as a cloud service.	It is not available as a cloud service.
14.	Programming languages supported are Java and Python.	Programming languages supported are C#, Clojure, Java, Lisp, Perl, Python, Ruby and Scala.