Hi Alejandro,
So your example is better called as "metasearch". Here a quotation from a book.
"Instead of retrieving information from a single information source using one
search engine, one can utilize multiple search engines or a single search
engine retrieving documents from a plethora of document collections. A scenario
where multiple engines are used is known as metasearch, while the scenario
where a single engine retrieves from multiple collections is known as
federation. In both these scenarios, the final result of the retrieval effort
needs to be a single, unified ranking of documents, based on several ranked
lists."
Ahmet
On Thursday, October 2, 2014 7:29 PM, Alejandro Calbazana
<acalbaz...@gmail.com> wrote:
Ahmet,Jeff,
Thanks. Some terms are a bit overloaded. By "federated", I do mean the
ability to query multiple, disparate, repositories. So, no. All of my
data would not necessarily be in Solr. Solr would be one of several -
databases, filesystems, document stores, etc... that I would like to
"plug-in". The content in each repository would be of different types (the
shape/schema of the content would differ significantly).
Thanks,
Alejandro
On Wed, Oct 1, 2014 at 9:47 AM, Jack Krupansky <j...@basetechnology.com>
wrote:
> Alejandro, you'll have to clarify how you are using the term "federated
> search". I mean, technically Ahmet is correct in that Solr queries can be
> fanned out to shards and the results from each shard aggregated
> ("federated") into a single result list, but... more traditionally,
> "federated" refers to "disparate" databases or search engines.
>
> See:
> http://en.wikipedia.org/wiki/Federated_search
>
> So, please tell us a little more about what you are really trying to do.
>
> I mean, is all of your data in Solr, in multiple collections, or on
> multiple Solr servers, or... is only some of your data in Solr and some is
> in other search engines?
>
> Another approach taken with Solr is that indeed all of your source data
> may be in "disparate databases", but you perform an ETL (Extract,
> Transform, and Load) process to ingest all of that data into Solr and then
> simply directly search the data within Solr.
>
> -- Jack Krupansky
>
> -----Original Message----- From: Ahmet Arslan
> Sent: Wednesday, October 1, 2014 9:35 AM
> To: solr-user@lucene.apache.org
> Subject: Re: Solr + Federated Search Question
>
> Hi,
>
> Federation is possible. Solr has distributed search support with shards
> parameter.
>
> Ahmet
>
>
>
> On Wednesday, October 1, 2014 4:29 PM, Alejandro Calbazana <
> acalbaz...@gmail.com> wrote:
> Hello,
>
> I have a general question about Solr in a federated search context. I
> understand that Solr does not do federated search and that different tools
> are often used to incorporate Solr indexes into a federated/enterprise
> search solution. Does anyone have recommendations on any products (open
> source or otherwise) that addresses this space?
>
> Thanks,
>
> Alejandro
>
