[context: at some point Google Site Search is probably going to be prohibitively expensive. is this a good alternative?]
Lucene is an underlying search technology, from Apache, in Java. Same as Solr.
big diff from Solr is that it’s clusterable? is that something that matters for us? I’ve no idea.
also, I have no goddamn idea what they’re talking about now.
“if you just want to search all your nodes, use Solr” ok then. (esp better integration with Search API?) so there’s that, I guess that’s the super-short answer to my question. not that there’s not super-neato stuff in Elasticsearch, and who knows, maybe by the time we price out of Google Site Search (does _that_ work with Search API) it’ll be ready for prime time.