That is the best engine for my Grails project.
Requirements for my books project:
- 200k+ entities
- 150k+ unique visitors per day
- meta information search only (book name, chapter name, author name...)
- 5-6 data types
- different priority of types. For example, book has higher priority then chapter, author has higher priority then translator
- suggestions
- possibility of search in specified fields
The contenders are:
- ElasticSearch
- Solr
- Sphinx
- ...
Update
Now I'm using ElasticSearch