- From: Michel Dumontier <michel.dumontier@gmail.com>
- Date: Mon, 18 Aug 2014 10:06:31 -0700
- To: Ruben Verborgh <ruben.verborgh@ugent.be>
- Cc: Andy Seaborne <andy@seaborne.org>, SWIG Web <semantic-web@w3.org>
On Mon, Aug 18, 2014 at 2:16 AM, Ruben Verborgh <ruben.verborgh@ugent.be> wrote: > Hi Andy, > >> How much is HDT used for real? > > We use it to enable client-side SPARQL query execution with 99.9% availability. > Here is an online demo: http://client.linkeddatafragments.org/. > > The HDT files are used to run the server at http://data.linkeddatafragments.org/. > Details on why HDT is a good format for this are here [1]. > >> By whom? > > We (Ghent University – iMinds) use it to host high-availability queryable datasets. > The software that enables this is available as open source [2], > so anybody else can use it to do the same. > >> I couldn't find HDT files. > > For the same reason you won't find Virtuoso db files: we use it on the server. actually, you can! The Bio2RDF project makes their indexed Virtuoso dbs available. http://download.bio2rdf.org/release/3/ we also provide gzipped nquads, and we'd be interested in providing an alternative binary, indexed format. m. > As you said, Thrift and HDT have different design goals. > Thrift files are meant to be “found“, HDT files not necessarily. > > BTW you can find HDT files here: http://www.rdfhdt.org/datasets/ > And the tools to make them yourself: http://www.rdfhdt.org/download/ > > Ruben > > PS I might be interested to look at a JavaScript/Node.js implementation of Thrift. > Are there any plans (or code) in that direction already? Pointers to start? > > [1] http://linkeddatafragments.org/publications/iswc2014.pdf > [2] https://github.com/LinkedDataFragments/
Received on Monday, 18 August 2014 17:07:19 UTC