Category: Community News
Welcome to a community who believes passionately in object persistence. This is one of the most exciting times for Versant as we are launching our integrated Developer Community platform which creates a huge opportunity for developers who are interested in NoSQL's best of breed.
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Hi, my name is Carl Rosenberger.
I would like to welcome you to our newly launched integrated Developer Community website.
This is now the place to discuss issues around all the database technology produced by Versant. We are looking forward to answer your questions here, no matter if you are a complete newbie to object database technology or if you are using the most advanced features.
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Thanks to Alyona Lompar we now have an Ukrainian translation of the dRS product info:
http://webhostingrating.com/libs/Replication-Services-ua
If you're interested in providing localized documents of db4o documentation please send a message to community@db4o.com
This article from The Code Project shows you how to create a common base class in your domain and implement the required changes to support db4o's TransparentActivation. A Db4oBase class is used implementing common logic for every persistent class.
You can check it out here (source included):
http://www.codeproject.com/KB/architecture/db4objectsdomainanddal.aspx
Just check http://nutrients.ofthings.net/ and loved it! It's so fast in retrieving data from db4o that it just works for this website. Probably using Lucene?
Congrats to Sam Stainsby!!
"I use db4o on a lot of personal projects. I even have started using db4o on a few of my Android projects. But I keep looking up that Maven snippet for adding db4o."
Check out this community contributed snippet for adding db4o via a Maven POM file.
http://killertilapia.blogspot.com/2011/08/maven-and-db4o.html
Managing telemetry data and information on steering and calibrating scientific on-board instruments with an object database
An interview with Dr. Johannes Riedinger, Herschel Mission Manager, European Space Agency (ESA), and Dr Jon Brumfitt, System Architect of the Herschel Science Ground Segment, European Space Agency (ESA).
This is a very interesting project currently progressing at the European Space Agency (ESA). On May 14, 2009, the European Space Agency launched an Arianne 5 rocket carrying the largest telescope ever flown: the “Herschel” telescope, 3.5 meters in diameter. The satellite whose orbit is some 1.6 million kilometers from the Earth, will operate 48 months.
One interesting aspect of this project is that they use Versant Object Database (VOD) to manage telemetry data and information on steering and calibrating scientific on-board instruments.
Roberto Zicari from ODBMS.ORG had the pleasure to interview Dr. Johannes Riedinger, Herschel Mission Manager, and Dr. Jon Brumfitt, System Architect ...
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An interview with Pieter van Zyl creator of the OO7J benchmark.
by Roberto V. Zicari (odbms.org) and Srini Penchikala (InfoQ).
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OO7J is a Java version of the original OO7 benchmark (written in C++) from Mike Carey, David DeWitt and Jeff Naughton at the University of Wisconsin-Madison. The original benchmark tested Object Databases (ODBMS) performance.
OO7J also includes benchmarking Object Relational Mapping (ORM) tools. Currently there are implementations for Hibernate on PostgreSQL, MySQL, db4o and Versant databases.
"The work showed that you could use the OO7 benchmark still to test today’s persistence frameworks. It really brought out performance differences between ORM Tools and object databases. This work is also the first OO7 implementation that tested ORM tools and compared open source against commercial object databases" says Pieter van Zyl.
The source code is available on s ...
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I became aware of some resources available in ODBMS.ORG that might be of interest to you:
Whitepapers/Reports
Object-Oriented or Object-Relational? An Experience Report from a High-Complexity, Long-Term Case Study (by
Peter Baumann, Jacobs University Bremen). Object-Oriented or Object-Relational? We unroll this question based on our experience with the design and implementation of the
array DBMS rasdaman which offers storage and query language retrieval on large, multi-dimensional arrays such as 2-D remote sensing imagery and 4-D atmospheric simulation results. This information category is sufficiently far from both relational tuples and object-oriented pointer networks to achieve a "fair" comparison where no approach has an immediate advantage. Link: http://www.odbms.org/downloads.aspx#odbms_ap
Relational Databases, Object Databases, Key-Value Stores, Document Stores, and Extensible ...
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It's here! After weeks of hard work we're proud to officially announce db4o Production Version 8!
We're now taking db4o to the next level by:
- Making v7.12 the stable release (see the db4o v7.12 Release Notes)
- v8.0 is now our official production version which benefits from all the hard work that we've put in this special release
(see the db4o v8.0 Release Notes)
- We have a brand new v8.1 which is now our development branch with the very latest db4o features (not for the faint of heart :)
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