Situations to prefer Apache Lucene over Solr?

Question

There are several advantages to use Solr 1.4 (out-of-the-box facetting search, grouping, replication, http administration vs. luke, ...).

Even if I embed a search-functi

Answer 1

Use Solr if you are more concerned about scalability than performance and use Lucene if you are more concerned about performance than scalability.