Use Lucene for full text search

[nathan-osman]

Currently we are using PostgreSQL to search for content within articles. This has two problems:

• It is deathly slow.
• It searches raw markdown, so if your query is "image" it will match [image:24].

Lucene would solve both problems since we would feed it the rendered markdown with HTML stripped.

[jrgifford]

Lucene vs elasticsearch?

[nathan-osman]

I don't know much about either, except elasticsearch looks a lot more complicated.