Thread:Extension talk:Lucene-search/Restricted search and wiki size

1. I will have several parts to my wiki. I would like my users to be able to restrict their search to certain sections while still retaining the availability of a global site search. I infer from what I have read here that this is possible but I have not seen where how to do it is explained.
 * My advice would be to put those articles inside of a namespace then allow your user to pick their space to search it -- 22:37, 26 January 2011 (UTC)

2. The main text warns that this extension is for "large" wikis and suggests Sphinx for "small" wikis, but what is "small" and what is "large"?

Thank you.