Ask HN: Free and open source distributed database written in C++ or C

1. ydb

   1 11 4,106 10.0 C++

   YDB is an open source Distributed SQL Database that combines high availability and scalability with strong consistency and ACID transactions

   

2. SaaSHub

   www.saashub.com featured

   SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

   

3. yugabyte-db

   2 98 9,158 10.0 C

   YugabyteDB - the cloud native distributed SQL database for mission-critical applications.

   

   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.

4. Scylla

   3 24 13,966 10.0 C++

   NoSQL data store using the seastar framework, compatible with Apache Cassandra

   

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

   I have a lot of experience with Cassandra though.

5. dqlite

   4 33 3,936 9.4 C

   Embeddable, replicated and fault-tolerant SQL engine.

   

6. scaliendb

   5 2 85 10.0 C++

   ScalienDB is a scalable, replicated datastore.

7. ClickHouse

   6 231 38,466 10.0 C++

   ClickHouse® is a real-time analytics database management system

   

8. redpanda

   7 71 9,852 10.0 C++

   Redpanda is a streaming data platform for developers. Kafka API compatible. 10x faster. No ZooKeeper. No JVM!

   

   Went searching for https://redpanda.com/ and couldn't find it in the DB, fyi :)

   Not affiliated, just saw the Jepsen report posted here a few weeks ago.

9. rupy

   8 31 138 3.7 Java

   HTTP App. Server and JSON DB - Shared Parallel (Atomic) & Distributed

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

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

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

10. Aerospike

    9 16 1,115 8.9 C

    Aerospike Database Server – flash-optimized, in-memory, nosql database

    

    Scylla's main competitor in replacing C* with native code.

    https://github.com/aerospike/aerospike-server

11. MySQL

    10 168 11,041 9.9 C++

    MySQL Server, the world's most popular open source database, and MySQL Cluster, a real-time, open source transactional database.

    

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