Db4o Releases Version 6.0 Including .NET Support and Open Source Licensing Changes

Posted by Scott Delap on Dec 21, 2006

Sections

Operations & Infrastructure,

Architecture & Design,

Development

Topics

Java ,

.NET ,

Languages ,

Data Access ,

Programming ,

Database ,

db4o

Db4Object has released version 6.0 of their open source object database. The product allows data to be stored at the object level instead of in a relational format. Compatibility with relational databases can be achieved using the db4o replication system. Native support is provided for both Java and .NET environments. Among the enhancements in this release:

• Better performance and less memory consumption than v5.x
• Lazy queries, a new server-side cursor technology to boost client-server performance
• .NET API changes make db4o as native to .NET as it is to Java
• Documentation "2.0", WIKI-based reference documentation infrastructure
• Fast defragmentation makes it now faster to defrag your database files
• ObjectManager v6.0, a complete rewrite addressing many user requests
• db4o Replication System (dRS) v6.0 now supports delete object replication as well as better compatibility to more databases

The other major change with this release is broader open source licensing. Db40o comes in both a GPL and commerical version (similar to mySQL). Licensing has been changed for the open source version to allow compatibility with projects licensed under Apache, LGPL, BSD, EPL, and others.

1. Back to top

   DB4O Licensing and JPOX

   by Andy Jefferson

   ... and to be the first product to make use of the new DB4O licensing terms, JPOX 1.1.0-beta-1 was released providing JDO/JPA interfaces for persisting to DB4O. This is released under the Apache 2 license.

   Reply

2. Back to top

   Re: DB4O Licensing and JPOX

   by Andy Jefferson

   that should have said 1.2.0-beta-1, of course. Shame there's no Edit feature here

   Reply

3. Back to top

   Java object databases

   by David Moshal

   I wonder how it compares to the excellent ObjectDb database?

   Reply

4. Back to top

   SQL?

   by Sam Smoot

   Was the SQL query interface ever released? I thought I remembered hearing around the 4.x time-frame that the 5.0 release would include it. This so that a db4o server could be used as a source for an OLAP database.

   Reply