Committers have reached the Guru Level OrientDB certification. They coordinates updates, patches, new tasks and answer actively to the Google Group. They talk in a private Mailing List to take decision all together.

**Description** Luca is the original author of OrientDB product and the main committer. In order to handle indexes in efficient way Luca has created the new MVRB-Tree algorithm (it was called RB+Tree but another different algorithm already exists with this name) as mix of Red-Black Tree and B+Tree. MVRB stands for Multi Value Red Black because stores multiple values in each tree node instead of just one as RB-Tree does. MVRB-Tree consumes less than half memory of the RB-Tree implementation mantaining the original speed while it balances the tree on insertion/update. Furthermore the MVRB-Tree allows fast retrieving and storing of nodes in persistent way. He is member of the Sun Microsystems [JDO 1.0 Expert Group (JSR#12)](http://www.jcp.org/en/jsr/detail?id=12) and JDO 2.0 Expert Group (JSR#243) for the writing of JDO standard.
**Company** [NuvolaBase Ltd](http://www.nuvolabase.com)
**Links** [Twitter](http://twitter.com/lgarulli) - [Google+](https://plus.google.com/u/0/111607061083712272202/posts) - [VisualizeMe](http://vizualize.me/luca.garulli) - [LinkedIn](http://www.linkedin.com/in/garulli) - [Blog](http://zion-city.blogspot.it) - [Ohloh](http://www.ohloh.net/accounts/lvca)
**Year** 2009 **Description** Contributor since 2010 and committer since 2012 Luca is author of various Http commands and the network protocol multipart management; author of the v1.0 ObjectDatabase implementation; author of the centralized Fetching strategy; author of the FIND REFERENCES SQL command; author of the ttl bash orient console; worked on SQL commands, Storage creation\deleting and more.
**Company** [Asset Data](http://www.assetdata.it)
**Links** [Twitter](http://twitter.com/MaDaPHaKa) [GitHub](http://github.com/MaDaPHaKa)
**Year**2012 **Description** Committer since 2012 and contributor since 2011. He started diving into indexes, composite indexes and many other was introduced.
He have deep knowledge about the MVRB-Tree algorithm, the optimization of the indexes on queries, Transactions and Binary storage.
**Links** [Twitter](https://twitter.com/#!/Andrey_Lomakin) [LinkedIn](http://ua.linkedin.com/in/andreylomakin)
**Year** 2012 **Description** Committer since 2012 and contributor since 2011. He started diving into indexes, composite indexes and many other was introduced.
He have deep knowledge about the MVRB-Tree algorithm, the optimization of the indexes on queries, Transactions and Binary storage.
**Links** [Twitter](https://twitter.com/#!/Dr_EniSh) [LinkedIn](http://ua.linkedin.com/in/artemorobets)
**Year** 2012

# Contributors

Contributors are all the people that contribute in any way to the OrientDB development as code, tests, documentation or other. They talk in a private Mailing List with all the other committers and contributors and are updated on changes in internal stuff like binary protocol. One time patch doesn't make you a contributor, but if you're developing a driver or you sent more patches then you are a candidate to figure in this list.

Description Artem took part in MMAP file improvement
Since 2011

**Description** Web developer since 2001, PHP developer since 2002. Developer and maintainer of OrientDB-PHP driver for binary protocol (https://github.com/AntonTerekhov/OrientDB-PHP), bug hunter, binary protocol tester :-) . Speaker on two Russian IT-conferences. Founder, CEO and Lead Developer of own company. Now specialized at high load, distributed web systems.
**Company** [NetMonsters](http://netmonsters.ru)
**Links** [Facebook](http://www.facebook.com/anton.terekhov)
**Since** 2011 **Description** Gabriel has been started the node.js OrientDB driver that implements the binary protocol. This helped discovering some problems in the binary protocol. Also helped a little with the corresponding documentation pages.
**Links** [Twitter](http://twitter.com/gabipetrovay) [LinkedIn](http://ch.linkedin.com/in/gabrielpetrovay)
**Since** 2012 **Description** Federico references to himself in the third person and develops the node.js driver, which powers its baby creature, http://presentz.org
**Links** [GitHub](https://github.com/ffissore) [Twitter](https://twitter.com/fridrik) [LinkedIn](https://www.linkedin.com/in/fissore) [Google+](https://plus.google.com/114091868176609494289)
**Since**

Description Java Developer specialized in Geographic Information Systems (GIS). Core developer on Geotoolkit project (http://www.geotoolkit.org) and related projects : GeoAPI, Mapfaces, Constellation, MDWeb, Puzzle-GIS. Member at the Open Geospatial Consortium (OGC) for elaboration of geographic specifications. Contributions on OrientDB are related to modularisation and performances.
Company Geomatys
Links Web Site Ohloh
Since 2012

**Description** Contributed C++ binding (https://github.com/Sfinx/orientpp)
**Company** [SfinxSoft](http://sfinxsoft.com/)
**Links** [LinkedIn](http://ua.linkedin.com/in/sfinx)
**Since** 2012

Description Tomas is developing and maintaining C# binary protocol driver for OrientDB.
Company ONXPO
Links Home Page GitHub Twitter LinkedId
Since 2012