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From "Mekin Maheshwari" <meki...@gmail.com>
Subject Re: Searching multiple indices (solr newbie)
Date Thu, 04 Jan 2007 14:33:48 GMT
Thanks Chris.

>         http://wiki.apache.org/solr/FederatedSearch

Thats useful & I might be getting close to that size soon.


The issue is best described with an example:
search for canon - matches multiple categories, which will have very
different schemas
http://cnet.search.com/search?chkpt=astg.cnet.fd.search.cnet&q=canon&tag=srch

While this might vary with applications.
2 options that come to my mind:

1. Have 1 index that has ALL categories of products. Possibly 1
generic index with all searchable text, and separate indices when you
know the categroy user is looking for. But with this ranking products
well becomes very difficult.


2. Have separate indices for each category of products. Query them &
merge the results from them. Merging across indices is a difficult
issue. I can draw some learning from the federated search, but this
would more likely be business logic.



Thanks,
mekin



On 1/4/07, Chris Hostetter <hossman_lucene@fucit.org> wrote:
>
> Mekin: Yonik has done some brainstorming on ways of supporting "Feterated"
> searching across multiple instances of Solr - but the main motivation
> there is to deal with homogeneous indexes which are too big to fit on a
> single host efficiently...
>
>         http://wiki.apache.org/solr/FederatedSearch
>
> ..if you've got seperate schemas for each of your indexes, then you have
> to query then in different ways, so how could you meaningfully merge the
> scores?
>
>
>
>
> -Hoss
>
>


-- 
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