HiRDB is a distributed relational DBMS built by Hitachi.
The HiRDB name stands for "Highly-scalable Relational Database". The project started in the 1990s based on Hitachi's previous mainframe DBMSs.
Disk-oriented
Shared-Nothing
Relational Document / XML
https://www.hitachi.com/products/it/software/prod/hirdb/
https://www.hitachi.com/products/it/software/prod/hirdb/doc.html
Hitachi
JP
1994
Commercial
Proprietary