Hello, Have you ever wondered if Solr will ever support saving searches and efficiently surfacing them given a matching document?
I can't answer that question with certainty but still wanted to share a bit of work that has been done over the last year to that end. The (proposed) saved-search module attempts to provide a request-response API which takes a document and fetches matching queries, something similar to Elastic's Percolator. Solr's streaming expressions API should work with this as well if you need to fetch a very large number of queries. The documentation is here (still a WiP) https://github.com/kotman12/solr/tree/solr-monitor-doc/solr/modules/saved-search#overview If you want to try it out yourself you can run with the patch attached to the latest update on the JIRA: https://issues.apache.org/jira/browse/SOLR-4587 This might be of special interest to you if you already use lucene-monitor for this functionality. The proposed module uses all the clever lucene-monitor optimizations for document <-> query translations. On top of that, it comes with a few of its own optimizations around caching which result in potentially lower memory utilization as well as freeing queries from getting blocked by updates, which is something you may have encountered running lucene-monitor on your own. It also scales by default (thanks, Solr) and lets you seamlessly reuse your Solr schema + analyzers for saved-search. I would greatly appreciate feedback or involvement from anyone on this list who might be interested. Looking forward to hearing from you here or on the PR .. or the JIRA. Thanks, Luke
