Comdb2
Original author(s)Combdb2 Team
Developer(s)Comdb2 team, and other open source component developers
Initial release1 January 2016 (2016-01-01)[1]
Stable release
7.0
Written inC
Operating systemLinux, Solaris, AIX
Available inEnglish
TypeRDBMS
LicenseApache v2, BSD License, MIT License, Sleepycat License[2]
Websitebloomberg.github.io/comdb2/

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]

See also

References

  1. ↑ "Comdb2". Comdb2 Website. Retrieved 2020-11-18.
  2. ↑ "Comdb2 Licenses". Comdb2 Licenses.
  3. ↑ "SQL language | Comdb2 Documentation". bloomberg.github.io. Retrieved 2020-11-18.
  4. ↑ http://www.vldb.org/pvldb/vol9/p1377-scotti.pdf
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