ARQtick
A blog related to my work activities - SPARQL, RDF, ARQ, TDB, Jena, Fuseki.
19 May 2011
Importing SourceForge code into Apache for Jena
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The Jena project now has the legal paperwork done for the vast majority of the codebase. It's now time to move the code from SourceFor...
02 March 2011
Updating RDF Lists with SPARQL
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Something the SPARQL Working Group has been thinking about recently is updates to RDF lists. RDF lists are hard to deal with because the...
1 comment:
09 December 2010
Performance benchmarks for the TDB loader (version 2)
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CAVEAT There are " Lies, damned lies, and statistics " but worse are probably performance measurements done by someone else. The...
TDB bulk loader - version 2
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This article could be subtitled called "Good I/O and Bad I/O". By arranging to use good I/O, the new TDB loader achieves faster ...
2 comments:
03 December 2010
Repacking B+Trees
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TDB uses B+trees for it's triple and quad indexing. The indexes hold 3 or 4 NodeIds, where a NodeId is a fixed length 64 bit uniq...
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