Scalar DB

A library that makes non-ACID distributed databases/storages ACID-compliant. It not only supports strongly-consistent ACID transactions, but also scales linearly and achieves high availability when it is deployed with distributed databases/storages such as Cassandra.

Docs

• Getting started
• Design document
• Slides
  • Making Cassandra more capable, faster, and more reliable at ApacheCon@Home 2020
  • Scalar DB: A library that makes non-ACID databases ACID-compliant at Database Lounge Tokyo #6 2020
  • Transaction Management on Cassandra at Next Generation Cassandra Conference / ApacheCon NA 2019
• Javadoc
• Jepsen tests
• TLA+
• Sample applications by contributors/collaborators
• Q&A application (From Indetail Engineering team)

Contributing

This library is mainly maintained by the Scalar Engineering Team, but of course we appreciate any help.

• For asking questions, finding answers and helping other users, please go to stackoverflow and use scalardb tag.
• For filing bugs, suggesting improvements, or requesting new features, help us out by opening an issue.

Here are the contributors we are especially thankful for: - Toshihiro Suzuki - created Phoenix adapter for Scalar DB - Yonezawa-T2 - reported bugs around Serializable and proposed a new Serializable strategy (now named Extra-Read)

License

Scalar DB is dual-licensed under both the Apache 2.0 License (found in the LICENSE file in the root directory) and a commercial license. You may select, at your option, one of the above-listed licenses. The commercial license includes enterprise-grade tools, such as a multi-table consistent backup/restore tool for Cassandra. Regarding the commercial license, please contact us for more information.