| Comdb2 | |
| Comdb2 | |
| Author: | Combdb2 Team |
| Developer: | Comdb2 team, and other open source component developers |
| Released: | [1] |
| Latest Release Version: | 7.0 |
| Programming Language: | C |
| Operating System: | Linux, Solaris, AIX |
| Language: | English |
| Genre: | RDBMS |
| License: | Apache v2, BSD License, MIT License, Sleepycat License[2] |
Comdb2 is an open source, highly available clustered RDBMS developed by Bloomberg LP, built on optimistic concurrency control techniques. It provides multiple isolation levels, including Snapshot and Serializable Isolation. Read/Write transactions run on any node, with the client library transparently negotiating connections to lowest cost (latency) node which is available. Comdb2 implements queues for publisher-to-subscriber message delivery. Queues can be combined with table triggers for time-consistent log distribution.
Comdb2 supports the SQLite dialect of SQL with some modifications,[3] and embeds the Lua scripting language. Comdb2 maintains a fork of Berkeley DB to provide the key–value database backend to SQLite.
Comdb2 architecture was described in detail in this 2016 technical paper.[4]