SequoiaDB is a distributed relational database with a storage layer and a computing layer.
The storage layer is a database storage engine that uses the Raft algorithm to achieve data consistency across a distributed environment.
The computing layer is either a relational database instance such as a MySQL instance, a semi-structured data access instance such as via JSON APIs, or an unstructured data storage model instance such as with AWS S3.
Key features of SequoiaDB include
https://github.com/SequoiaDB/SequoiaDB
http://doc.sequoiadb.com/cn/sequoiadb
SequoiaDB Corporation
2011