I am considering enabling a true "Federated Search", or meta-search, using the following basic configuration (this configuration is only for development and evaluation):
Three Solr cores: - One to search data I have indexed locally - One with a custom SearchHandler that is a facade, e.g. it performs a meta-search (aka Federated Search) - One that queries and merges the above cores as "shards" Lest I seem completely like Sauron, I read http://2011.berlinbuzzwords.de/sites/2011.berlinbuzzwords.de/files/AndrzejBialecki-Buzzwords-2011_0.pdf and am familiar with evaluating "precision at 10", etc. although I am no doubt less familiar with IR than many. I think that it is much, much better for performance and relevancy to index it all on a level playing field. But my employer cannot do that, because we do not have a license to all the data we may wish to search in the future. My questions are simple - has anybody implemented such a SearchHandler that is a facade for another search engine? How would I get started with that? I have made a similar post on the blacklight developers google group.