2011/11/15 Enrico Daga <enricod...@gmail.com> > Hi Reto, > sorry for this late reaction (and sorry to the clerezza-dev list!) but > I missed this e-mail... > The reason for implementing this adapter was that we use Virtuoso Open > Source as quad store for http://data.cnr.it and I am working on the > integration of some Stanbol components (in particular Reasoners and > Ontonet) with it. So, my aim was simply to have Stanbol/Clerezza > read/write on virtuoso. I preferred to write a light jdbc-based > adapter instead of using the sesame based library shipped with > virtuoso (and having yet another intermediate layer...). For this I > have learned a lot from the implementation of the weighted provider > for Sesame (I have totally cloned the multithread tests, for > instance...;) ). > I didn't do a comparison with Jena TDB in terms of performances and > scalability, but data.cnr.it started with virtuoso and we like it (it > hosts more then 2.700.000 triples and is very fast on a 2G virtual > machine...). > Now I am working on long term operations for stanbol reasoners, after > that I will start working on stanbol+data.cnr.it via clerezza-virtuoso > and have a *real* test for that component. > > If the Clerezza community likes it, I would be very happy to > contribute that code to the project. >
in my opinion this would be a very valuable contribution as I have seen Virtuoso being used with huge storage scenarios as well. Also from a community development point of view it could ease the Clerezza adoption for Virtuoso users. BUT I think that's not possible at the moment due to licensing issues wich GPL2, see [1][2]. Am I wrong? Tommaso [1] : http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/VOSLicense [2] : http://www.apache.org/legal/resolved.html > > (Last but not least, code reviews or any hint on the implementation is > welcome!) > > Bests, > Enrico > > On 10 November 2011 23:48, Reto Bachmann-Gmür <r...@apache.org> wrote: > > Enrico wrote: > >> > >> progress: > >> - implemented clerezza-virtuoso storage adapter (stanbol - > >> data.cnr.it integration) > >> > >> > >> > >> > >> > https://github.com/enridaga/clerezza-virtuoso/tree/master/clerezza-virtuoso > > > > Hi Enrico, > > > > This looks very cool! > > > > What are your expiriences, what are the benefits and trade-offs compared > > with tdb storage? > > > > Cheers, > > Reto > > > > > > > > > > > > -- > Enrico Daga > > -- > http://www.enridaga.net > skype: enri-pan >
