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Re: Announcing RDFdb

From: Guha <guha@guha.com>
Date: Fri, 18 Aug 2000 10:22:01 -0700
Message-ID: <399D70B8.13F8F2B0@guha.com>
To: Sergey Melnik <melnik@DB.Stanford.EDU>
CC: www-rdf-interest@w3.org
Hi Sergey,

 Did you have to make any chage to the code to get it running
on Solaris?

 I have plans of supporting reification. Just haven't done it yet.

 The indexes are currently built on b-trees provided by Sleepycat.
 I am working on a "nested hash" structure which is more appropriate
for graphs. The "join algorithm" is fairly straightforward and
only uses conjunct ordering for optimization. I plan to implement
a lot of the optimizations used in cyc, lore, etc.

 Thanks! Do you have any suggestions, advice, etc? We should talk
about this sometime.

 Guha




Sergey Melnik wrote:

> Guha,
>
> I got RDFdb running on Solaris, good job. Could you clarify the following
> issues:
>
> 1. Query processing: what join algorithms and index structures are you
> using? These determine to a high degree the scalability of your
> implementation. Did you evaluate the store say against Dmoz data?
>
> 2. Afa I can see, reification is not supported. Why not?
>
> More comments when I'm back to office...
>
> Sergey
>
> On Tue, 25 Jul 2000, Guha wrote:
>
> > Hi,
> >
> >  I'd like to announce the first release of RDFdb
> > (http://www.guha.com/rdfdb/).
> >
> >  RDFdb is an open source (under the MPL) scalable triple database server
> > with a
> > SQL-like front end. Its written in C with a perl client.
> >
> >  You can download a linux binary or the source from the above url.
> >
> >   I'd appreciate any comments, feedback, bug reports, bug fixes, ...
> >
> >  thanks,
> >
> >  Guha
> >
> >
Received on Friday, 18 August 2000 13:22:48 GMT

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