tdbloader3 ---------- This is an experimental (pure Java) version of tdbloader2 (which uses UNIX sort instead). See also: https://issues.apache.org/jira/browse/JENA-117 If you want to try it, here is how you can checkout and compile it: cd /tmp svn co https://svn.apache.org/repos/asf/incubator/jena/Scratch/PC/tdbloader3/trunk/ tdbloader3 cd /tmp/tdbloader3 mvn package This is how you can run it: java -cp target/jena-tdbloader3-0.1-incubating-SNAPSHOT-jar-with-dependencies.jar -server -d64 -Xmx6144M cmd.tdbloader3 --no-stats --compression --spill-size 1500000 --loc /tmp/tdb /opt/datasets/raw/openlibrary-2011-06-02.nt.gz For a list of the options: java -cp target/jena-tdbloader3-0.1-incubating-SNAPSHOT-jar-with-dependencies.jar cmd.tdbloader3 -h cmd.tdbloader3 --loc=DIR FILE ... General -v --verbose Verbose -q --quiet Run with minimal output --debug Output information for debugging --help --version Version information --loc Location --compression Use compression for intermediate files --buffer-size The size of buffers for IO in bytes --gzip-outside GZIP...(Buffered...()) --spill-size The size of spillable segments in tuples|records --no-stats Do not generate the stats file --no-buffer Do not use Buffered{Input|Output}Stream --max-merge-files Specify the maximum number of files to merge at the same time (default: 100)