In case I used the wrong words, what I mean is marking a particular search index as "cached", and only updating cached search indexes on demand (instead of on open or periodically).

The reasoning is this: In everything search you can manually choose to rescan a particular folder, which allowed me to include network folders, and rely on a cached scan. So I could search through my NAS without having to frequently do time expensive scans.

I've been poking around in the codebase trying to get an idea of how to do this, but wanted to know what your thoughts were on how (or if) this should be done.

I absolutely need the ability to search through network folders like I did in everything search (trying to leave windows behind), so I'm going to be doing something. But if there's another way I could do this that is more useful for the project, I could try that way instead.