Hey everyone, I can finally demonstrate the neo4j and gwt system that I have been blogging about over the last weeks here and here. But please find the demo under the following adress:

http://gwt.metalcon.de/GWT-Modelling

The code will be available soon! But it was hacked together pretty nasty and definatly needs some cleanup! Also I think that I still have one lack in memory while maintinging the index for my news feed. Hopefully I will be able to do this while writing my paper and do more on the evaluation. Already thanks a lot to Jonas Kunze and Dr. Thomas Gottron as well as Peter from neo technologies for the great support during this project!

The Graph that I used is extracted from the complete revision dump of the bavarian wikipedia and has the following properties:

• 8’760 entities
• ~95’000 Content items
• ==> together more than 100’000 nodes
• almost 20’000 different relationship types (more to come in bigger graphs!)
• about 100’000 edges connecting the 8’760 entities
• mainting the index was possible with (only :[ ) 177 writes / second on a slow notebook computer
  
  

I interpret the wikipedia graph in the following way as a social network:

• every article corresponds to an entity
• every link corresponds to a directed friendship (follower)
• every revision corresponds eather to a status update (content item) or a change in the friendship graph
  
  
  

I have no idea yet how many reads I can do per second. Even though I am a little disappointed about the low speed for writing on the graph I am sure that I will achieve my theoretical goals for reads per second. I also hope to increase writing spead if I introduce better transaction management. Anyway I will blog about the results of the reads / second later.