It depends (tm). How much data are we talking about here?I dislike having to
have two data sources for a running app
just because it's more complicated, so my first try would
be to store all the data in the index and try it. A several
Gigabyte index is not a problem at all (depending upon
how you u
store a field only if you want to retrieve the corresponding values i.e you
want them to be part of the search result, if you just want to use them to
search and you are not bothered about pulling the matched data out of the
index, there is no need to putting extra burden by storing them as well, i
