Free and open source distributed database written in C++ or C

Clickhouse for OLAP and ydb for OLTP are both in C++. Both are used at production scale in Yandex. Clickhouse has been around for a long time while ydb is pretty new.

Clickhouse - https://github.com/ClickHouse/ClickHouse

ydb - https://github.com/ydb-platform/ydb

Here's a query on Carnegie Mellon's "Database of Databases" that might help you find some answers:

https://dbdb.io/browse?programming=c&programming=cplusplus&s...

(note that this doesn't filter on license -- I couldn't see a way to add a negative-filter on proprietary licensing -- so you may have to inspect a few of the results to confirm)

HN would probably come up with better answers if you told us the problem you're trying to solve instead of the solution you seek.

https://www.yugabyte.com - Postgres fronted distributed OLTP database

I work there (300+ ppl). It's primarily open source. It makes money through support contracts and cloud hosting, but all core development is done in the open.

Never used it before but check out https://github.com/scylladb/scylla

I have a lot of experience with Cassandra though.

Yugabyte is an open source distributed database that has a Postgres compatible query layer as well as a Cassandra compatible one.

https://www.yugabyte.com/

What are you trying to do, and why the C++ requirement?

How about dqlite?

https://github.com/canonical/dqlite

Erlang's Mnesia has parts in C; well the underlying databases ets and dets are in C, the distributed part is in Erlang.

FoundationDB

https://www.foundationdb.org/

MySql/Postgres? What am I missing?

Does PostgreSQL not fit your needs?

MySQL Innodb Cluster? https://dev.mysql.com/doc/refman/8.0/en/mysql-innodb-cluster... targets C++17 nowadays

PostgreSQL with Patroni and Citus

What are the other aspects?

Surprised MongoDB hasn't been mentioned yet. It's C++

ydb yhttps://github.com/ydb-platform/ydb

https://github.com/scalien/scaliendb

https://apnewscorner.com/y2mate/

Check lut cmu database group on youtube, ghe feature a lor of databases

Redis?

Dont most of them match your specs?

Doesn't exist.

I have one in Java: https://github.com/tinspin/rupy

(Which is better for a server, Java does not crash and it can do atomic shared parallelism between cores with OO code something you would need to use arrays to achieve in C/C++ without VM + GC.)

Here is the 2000 lines of code of the entire database: http://root.rupy.se/code?path=/Root.java&space

Darkmode: http://edit.rupy.se/?path=/Root.java&space

And here you can try it out: http://root.rupy.se