Scaling Lucene and Solr | Lucid Imagination
While many Lucene/Solr applications will never outgrow a single,
well-configured machine, the fact is, more and more applications are
pushing beyond the single machine limit due to either index size or
query volume. In discussing Lucene and Solr best practices for
performance and scaling, Mark Miller explains how to get the most out
of a single machine, as well as how to harness multiple machines to
handle large indexes, large query volume, or both.