VoltDB

Volt Active Data
DeveloperVolt Active Data
ReleaseMay 25, 2010 (2010-05-25)
Stable release
11.3 / April 21, 2022 (2022-04-21)
Written inJava, C++
Operating systemLinux, macOS
PlatformJava
TypeRDBMS
LicenseGNU Affero General Public License v3, VoltDB Proprietary License
Websitevoltactivedata.com

Volt Active Data (formerly VoltDB) is an in-memory database designed by Michael Stonebraker, Sam Madden, and Daniel Abadi. That team had started an experimental version called H-Store while working at a set of US universities.

It is an ACID-compliant RDBMS that uses a shared-nothing architecture, and is derived from work done by Stonebraker on OLTP system performance and optimization.

It is available in both enterprise and community editions. The community edition is licensed under the GNU Affero General Public License.