Graph Database

René Pickhardt on September 2nd, 2013

Archived; click post to view. Excerpt: It is almost 2 years over since I published my first ideas and works on graphity which is nowadays a collection of algorithms to support efficient storage and retrieval of more than 10k social activity streams per second. You know the typical application of twitter, facebook and co. Retrieve the [...]

Continue reading about Graphity Server for social activity streams released (GPLv3)

Archived; click post to view. Excerpt: Sorry to start with a conclusion first… To me Titan graph seems to be the egg-laying wool-milk-sow that people would dream of when working with graph data. Especially if one needs graph data in a web context and in real time. I will certainly try to free some time to check [...]

Continue reading about Aurelius Titan graph enables realtime querying with 2400 concurrent users on a distributed graph database!

René Pickhardt on June 25th, 2013

I was visiting FOSDEM 2013 with Heinrich Hartmann and talking about the video of this talk is finally online and of course I would like to share this with the community: The slides can be found here.

Continue reading about Video of FOSDEM talk finally online

Archived; click post to view. Excerpt: Finally we have all the basics that are needed for building an Autocomplete service and now comes the juicy part. From now on we are looking at how to make it fast and robust. In the current approach we open a new Data base connection for every HTTP request. [...]

Continue reading about GWT + database connection in Servlet ContextListener – Auto Complete Video Tutorial Part 5

Archived; click post to view. Excerpt: As we know neo4j has a master slave replication with eventual consistency so there is not the typical ACID requirements. The way is ether wring the master which pushes to the slaves. But it is also possible to write to the slaves directly which is super save but much [...]

Continue reading about Michael Hunger talks about High Availability of Neo4j built on Paxos in the GraphDevroom @ FOSDEM

Archived; click post to view. Excerpt: As I said yesterday I have been busy over the last months producing content so here you go. For related work we are most likely to use neo4j as core data base. This makes sense since we are basically building some kind of a social network. Most queries that [...]

Continue reading about Get the full neo4j power by using the Core Java API for traversing your Graph data base instead of Cypher Query Language

Archived; click post to view. Excerpt: Two days ago I arrived in Erfurt in order to visit the federal competition young scientists (Jugend Forscht). I reported about the project typology by Till Speicher and Paul Wagner which I supervised over the last half year and which already won many awards. Saturday night they have already [...]

Continue reading about Typology using neo4j wins 2 awards at the German federal competition young scientists.

Archived; click post to view. Excerpt: The reading club was quite inactive due to traveling and also a not optimal process for the choice of literature. That is why a new format for the reading club has been discussed and agreed upon.  The new Format means that we have 4 new rules we will only [...]

Continue reading about Reading Club on distributed graph db returns with a new Format on April 4th 2012

René Pickhardt on March 27th, 2012

Archived; click post to view. Excerpt: Over the last week we had our off campus meeting with a lot of communication training (very good and fruitful) as well as a special treatment for some PhD students called “massage your diss”. I was one of the lucky students who were able to discuss our research ideas [...]

Continue reading about PhD proposal on distributed graph data bases

Archived; click post to view. Excerpt: 6 months of hard coding and supervising by me are over and end with a huge success! After analyzing 80 GB of Google ngrams data Paul and Till put them to a neo4j graph data base in order to make predictions for fast scentence completion. Today was the award [...]

Continue reading about Paul Wagner and Till Speicher won State Competition “Jugend Forscht Hessen” and best Project award using neo4j


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