thanks a lot for your feedback and the clarification! After one month, I finally managed to correct the actual text – sorry for the delay.

Best,
Chris

that is a very generic error message – honestly, I think the server crashes on start. That could be because of a newer version of db4o dlls (the code is now half a year old and makes quite a bit of assumptions), or because some security issue like inaccessible file, user not authorized to open sockets, etc. Have you checked whether the config file is ok for you, i.e. whether paths are ok?

This server is rudimentary – there is practically no error checking or logging going on, which is a very bad idea when it comes to debugging or even production use. The idea was mainly to show how to get a windows service up and running.
You might want to add some larger `try{ }` blocks and write Exceptions to the log – that might help in finding the error.

Sorry this isn’t too helpful, but there are too many potential errors.

Chris

I try your solution, but when I start the server service, windows send me this error:
“the db4oServer service on Local Computer started and then stopped. Some services stop automatically if they have no work to do, for example, the Performance Logs and Alerts service”.
Do you have any ideia of this ???

thank´s

PS: I came from Brazil. Excusime my english.

very nice writeup!

But one sentence is not quite correct. You wrote:
“MongoDB is considered a NoSQL solution, while db4o is not.”
And the “is not” references to my website http://nosql-database.org
(#2 in Google right after the Wikipedia).

But as you can see db4o is clearly listed under this website.
I put db4o in the category “soft” nosql (which is nosql).
The rational to put Systems like db4o or XML Databases to the
“soft” nosql and not the “core” nosql is explained in my onaswer on
this blog: http://www.kellblog.com/2010/04/11/yes-virginia-marklogic-is-a-nosql-system/

I have been a part of the db4o team since 2003/04 and I would have a lot
of reasons to support db4o (e.g. The Definitive Guide book by Apress).
But the categories under the nosql websites and the listing for db4o and for all is quite fair I assume.

Best Regards
Stefan Edlich

My bad – in English it’s “Gulf” region. Since the German words for “Gulf” and “Golf” are both “Golf”, it’s a good example in German but obviously not in English Well, another thing facebook would know, right? I removed the region, but now the example isn’t too convincing. Any suggestions for ambiguous words? Wikipedia suggests “Mercury” as a particularly ambiguous word.

As to the discussion of relational vs. structured (and the terminology issue of whether object databases are a subset of ‘NoSQL’ or not), I believe we see some strange trench warfare at the moment.

There is no silver bullet, and I doubt people really believe that. However, adding some fuel to the fire can be fun