[ckan-dev] solr

Thu May 19 09:19:00 UTC 2011

Thanks!

I was wondering, because supporting *both* postgres FTS *and* solr is
a bit tricky (in fact, we're effectively not supporting both, as the
faceting stuff has only been implemented for installations with solr)

We're in a funny half-way place right now as the Solr stuff needs more
hand-holding and documentation to allow people to easily run with it,
but with postgres you don't get our full functionality.

Seb

On 19 May 2011 09:27, Friedrich Lindenberg
<friedrich.lindenberg at okfn.org> wrote:
> Hi Seb,
>
> On Wed, May 18, 2011 at 7:10 PM, Seb Bacon <seb.bacon at okfn.org> wrote:
>> Friedrich, would love to hear more detail, as those reasons also
>> pertain to postgres, no?!
>
> This is a good question, there were a few reasons for integrating with Solr:
>
> * It runs in a seperate server and (if we decide to drop the
> psql-specific backend) keeps a lot of the complexity out of our
> system.
> * It supports advanced query/pipeline processing: we can customize
> tokenization, synonyms, stopwords.
> * Full query language with boolean ops etc.
> * Facets, more-like-this, etc. All built in.
>
> I will stop quoting Solr feature sheets now, point is: it does a lot
> of nice things. Postgres FTS doesn't, especially field queries were
> unebelievably ugly when I started working on this and they still are.
>
> Other options we discussed at the time were using the Haystack
> framework or Xapian directly; Solr just seemed the best bet.
>
> - Friedrich
>
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