Search Engine - Lucene or Solr

Question

We need to integrate a search engine in our Product Catalog management software. the catalog is expected to have more than 4-5 mn. records with relational data spread over s

Answer 1

Let me shift your focus a bit: are you prepared to changes in architecture of you product? Both Lucene and Solr are implemented in Java. So you will end up running yet another web-container for hosting it (and hence will lose platform purity so to say). While Lucene was ported to .NET (Lucene.NET project), Solr was not as far as I know. If you happen to use SQL Server (which is likely, considering you platform), you might consider SQL Server Full-Text Search instead - it has almost the same features (not so feature-rich as Lucene/Solr, but anyway) and usually (in most cases) is much easier to incorporate into existing application. Besides that you benefit from simplified maintenance (it comes together with you database) and staying within single platform as well.