I'm trying to setup a system to have very low index latency (1-2 seconds) and one of the javadocs intrigued me:
"DirectUpdateHandler2 implements an UpdateHandler where documents are added directly to the main Lucene index as opposed to adding to a separate smaller index" The plain DirectUpdateHandler also had the same in its docs. Does this imply that there use to be another handler that could send docs to a small/faster index and then merge them in with a larger one or that someone could in the future? I read through a good bit of the code and didn't see how it could be handled from a searcher perspective but perhaps I'm missing some key piece. - will
