Hello,
At the moment i am doing some performance checks on tdb. The first i
checked was the import of the tdbloader2 and i got some weird results.
Maybe someone can help me out. Here are my testbase and the results.
The first test was to store 12 GB of triples into an empty store (i used
the german dbpedia).
Load time: 16 minutes
average loading: ca 81.000 triple / second
index time: 40 minutes
store size: 9,3GB
The second test was to store the same data into an allready filled store
As i started the import i created a store with 348.398.593 Triples from
DNB and HBZ (which are german libraries, store size: 33 GB).
Then i started to load the german dbpedia in.
Load time: 3 hours and 4 minutes
average loading: ca 7200 / second
index time: 38 minutes
store size: 19 GB!!!!!
Why does the loading time increases that immense? My expectation was,
that the index time increases. But it does not. There where no other big
proccesses running nearby. And why does the store size shrink to 19GB? I
am totally confused about that point.
With friendly regards
Stefan
--
Stefan Scheffler
Avantgarde Labs GbR
Löbauer Straße 19, 01099 Dresden
Telefon: + 49 (0) 351 21590834
Email: [email protected]
