Features

NEO implements ZODB's Storage interface, and supports  the following standard extensions:

• revisions (optional in BaseStorage) with MVCC support
• undo (optional in BaseStorage)
• pack (both pruning old object revisions and orphan objects)
• conflict resolution
• iterator (allows exporting storage data)

Note: There is no plan to support "version" extension in NEO, because of its pending-deprecation state.

NEO adds the following features:

• No central lock: no more storage-cluster-wide commit lock
• Increased scalability: load  balancing over multiple machines
• Fault tolerance: data replication over multiple machines

Documentation

• Introductory thread on zope-dev mailing list
• A short NEO overview (as pdf)
• Presentation at DZUG 2010 in Dresden (as pdf)
• Présentation à Solutions Linux 2012 à Paris (en pdf)

Scientific Publications

• O. Bertrand, A. Calonne, C. Choppy, S. Hong, K. Klai, F. Kordon, Y. Okuji, E. Paviot- Adet, L. Petrucci, and J.-P. Smets. Verification of large-scale distributed database systems in the NEOPPOD project. In Workshop on Petri Nets and Software Engineering (PNSE’09, associated with Petri Nets 2009) - poster paper, pages 315–316, 2009