Not with certainty as solr may be working far behind another set of tools that make queries (and nothing licensing prevents it). If you get a software that has maybe Solr inside, I think the credits section should include a mention of some sort. However, there may be hints if a website uses solr, and that would be by following http queries (e.g. with the web-inspector) and finding commonalities with the standard solr params (see here http://wiki.apache.org/solr/CommonQueryParameters).
paul > Hi All, > Is there a way to know if a website use Solr? Thanks. > Regards > Olivier
