: A more interesting solr related question is where a very heavy process like : SVD would operate. You'd want to run the 'training' half of it separate from a : indexing or querying. It'd almost be like an optimize. Is there any hook right : now to give Solr a "command" like <updateModels/> and map it to the class in : the solrconfig? The classify half of the SVD can happen at query or index : time, very quickly, I imagine that could even be a custom field type.
The EventListener plugin type let's you register arbitrary java code to be run after a commit or an optimize (before a new searcher is opened) ... this is the same hook mechanism that is used to trigger snapshots on masters and do explicit warming on slaves. there was talk about creating a request handler that could be used to trigger aritrary "events" and xecute all of hte EventListeners (so you could create a new "updateModels" even type, independent of commit and optimize) but no one has ever submitted a patch... http://issues.apache.org/jira/browse/SOLR-371 -Hoss
