Chapter 8. Advanced Solr – Grouping, the MoreLikeThis Query, and Distributed Search

In this chapter we will look at some of the advanced concepts of Solr. We will look at grouping results based on certain criteria. We will also look at finding results similar to a particular document based on some terms within the document. We will explore distributed search that can be used to horizontally scale the Solr search infrastructure. Topics that will be covered in this chapter are

• Grouping results by field

• Grouping results by query

• Running morelikethis query using PHP

• Tuning parameters of morelikethis query

• Distributed search

• Setting up distributed search

• Executing distributed search using PHP

• Setting up Solr master-slave

• Load balancing Solr queries using PHP