[redland-dev] Dydra's use of libraptor2

Dave Beckett dave at dajobe.org
Thu Sep 8 22:57:10 CEST 2011

On Thu, 8 Sep 2011, Arto Bendiken wrote:

> Hello Dave,
> As an addition to <http://librdf.org/using.html>, please feel free to
> mention Dydra's use of Raptor.
> Following our platform upgrade yesterday [1], we are now using
> libraptor2 to perform all parsing of data import operations (in any
> serialization format supported by Raptor) for our users, as well as
> the serving of downloadable export dumps (in the usual RDF formats) of
> users' repositories.
> Internally, our data flows are based mostly on N-Triples/N-Quads, for
> which we have rolled our own custom C library that churns through
> triples a little faster than libraptor2. (Some 40+% faster, due to an
> uber-optimized, hand-rolled parser, plus no dynamic memory
> allocation.)
> Externally at the interfaces, however, it's now all libraptor2 --
> wholly replacing the earlier Ruby-based parsing/serialization
> pipelines that simply proved too slow for the demands of our
> customers. Particularly praiseworthy are Raptor's capabilities for
> autodetecting input serialization formats, which have considerably
> simplified the implementation of our data imports.
> Our GitHub fork of libraptor2 is located at
> <https://github.com/datagraph/raptor>. Time permitting, and provided
> it'd be welcome, we'd like to eventually contribute back our N-Quads
> parser implementation, as that would enable us to simply rely on
> libraptor2 throughout the stack.

Thanks for all the feedback, I'm glad it's working out for you and I will 
take a look at the fork.


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