db4o Developer Community

Hi everybody.  I'm sorry that I was not able to attend the meeting on Dec 12. I hope that someone can post some information on it. I think it is great that these topics are being discussed, but I also have some significant disagrements with points being made here. My biggest issue is that I don't agree with the premise of the OMG RFI ...

I work for a company that is evaluating DB4o, but we have come across some performance issues.  I understand that the .NET version of DB4o includes all the optimization functionality.  I am using .NET 3.0 and DB4o 6.105, and the queries that I am executing aren't being optimized, even when ...

As my my first db4o project, I am trying to organize all my digital photographs. I have Media class, with Photo class derived from it.  In the Photo class I have a datetime field and a  .NET List of Person class. One of my  eventual desires is to know a count of the people in photos as a total and for some time period.  Is ...

I am using a NL query in Java to do a search with an enum field as a criterion. The field is indexed. It seems that it only works if I compare the ordinal values of the enum. When I say it ''works'' I mean that I get the correct number of objects back. Without the ordinal methods the enum field seems to be treated as unconstrained. Is this ...

Hi, I am evaluating db4o for use at work. We store a single table of fairly simple data (no joins, just one class with 13 or so string/long fields), but it needs to be able to handle millions of records. Currently we are using a normal SQL database, but some of the queries are a bit slow: 10-20 seconds is too much. I am having trouble getting ...