1. Trafodion：
它是一个事务性的基于Hadoop的SQL DBMS。这是一个Webscale-SQL-on-Hadoop解决方案，支持Apache Hadoop上的事务或操作工作负载。 “ Trafodion”这个名字的发音是“ Tra-vod-eee-on”。它是一个在Apache Hadoop上运行的关系数据库管理系统，该系统使用并行感知的查询优化器为大数据环境中的事务或操作工作负载以及大数据集提供支持。
2. VoltDB：
它是符合ACID的RDBMS和使用无共享体系结构的分布式内存中NewSQL RDBMS。由Michael Stonebraker，Sam Madden和Daniel Abadi设计的数据库。最初，VoltDB数据库包括群集吞吐量和延迟以及CPU和内存使用情况的图表。它基于H-Store，并随着多核服务器上每CPU核心数的增加而扩展。
Trafodion和VoltDB之间的区别：
| S.NO. | Trafodion | VoltDB |
|---|---|---|
| 1 | Developed by Apache Software Foundation, originally developed by HP and initially released on 2014. | Developed by VoltDB Inc. and initially released on 2010. |
| 2 | Current release on February 2019. | Current release on April 2019. |
| 3 | Linux is server, operating systems of Trafodion . | Linux, OS X are server operating systems of VoltDB. |
| 4 | Primary database model is Relational DBMS. | Primary database model is Relational DBMS. |
| 5 | All languages supporting JDBC/ODBC/ADO.Net are programming languages. | C#, C++, Erlang, Go, Java, JavaScript, PHP, Python are supporting programming languages. |
| 6 | ADO.NET, JDBC, ODBC are the APIs and other access methods of Trafodion. | Java API, JDBC, RESTful HTTP/JSON API are APIs and other access methods. |
| 7 | Trafodion has Data Schema. | It also has Data Schema. |
| 8 | It has Implementation language Java and C++ . | Implementation language of VoltDB is Java, C++. |
| 9 | Trafodion has ACID Transaction concepts. | ACID (Atomicity, Consistency, Isolation, and Durability) is Transaction concepts. |
| 10 | Via HBase is replication methods of Trafodion. | Replication methods of VoltDB is Master-master replication and Master-slave replication. |
| 11 | Trafodion holds Immediate Consistency concept. | It does not holds Consistency concept. |
| 12 | It has concept of Foreign keys. | It also has concept of Foreign keys. |