OntoCluster

Cluster dbPedia (http://dbpedia.org) instances based on the type of relations defined for them.

Case study for http://aprendizajengrande.net

Getting the data

You'll need redis version 2.8.17 or later (see below).

Full dump (with values per instance): http://aprendizajengrande.net/dbpedia_full.rdb.7z (182Mb, ~16M keys) Clean dump (for use with current code): http://aprendizajengrande.net/dbpedia.rdb.7z (65Mb, ~6M keys)

To use, stop redis (service redis-server stop), uncompress the file using 7zip and put its contents with name dump.rdb in /var/lib/redis, owned by user redis, group redis. Then restart redis.

Generating the data

(You don't need these steps if you use the redis dump above.)

Get instance_types_en.nt.bz2 and mappingbased_properties_en.nt.bz2.

Set the path in scripts/dbpedia-upload-to-redis.pl

Execute

$ perl dbpedia-upload-to-redis.pl $ perl clean-redis.pl

Redis Version

You'll need version 2.8.17 or later:

deb http://http.debian.net/debian/ wheezy-backports main contrib non-free deb-src http://http.debian.net/debian/ wheezy-backports main contrib non-free

apt-get install -t wheezy-backports redis-server

Sample Output

See http://aprendizajengrande.net/clases/material/cluster_output_dbpedia_250_0.005_cosine.txt

Running the code

you need to have Mahout 1.0 installed from source in your local repo, configured for Hadoop 2.0, see below

mvn clean package assembly:single

Then run the hadoop job org.keywords4bytecodes.firstclass.Driver pointing to the tsv file training file (see below) and an output directory.

Installing Mahout from source

$ git clone https://github.com/apache/mahout.git $ cd mahout $ mvn clean package -DskipTests -Drelease -Dmahout.skip.distribution=false -Dhadoop.profile=200 -Dhadoop2.version=2.4.1 -Dhbase.version=0.98.0-hadoop2

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