> > or needs to be supported by ACID - then a RDBMS is for you. > > In what way is ZODB not ACID compliant? Taken from ZODB/ZEO Programming Guide (http://www.amk.ca/zodb/guide/node12.html): (...) The ZODB provides 3 of the ACID properties. Only Consistency is not supported; the ZODB has no notion of a database schema, and therefore has no way of enforcing consistency with a schema. Luis Neves