>From the Solr wiki[1] : *Logical* /Collection/ : It is a collection of documents which share the same logical domain and data structure
*Physical* /Solr Node/ : It is a single instance of a Solr Server. From OS point of view it is a single Java Process ( internally it is the Solr Web App deployed in a Jetty Server) /Solr Core/ : It is a single Index ( with its own configuration) within a single Solr instance. It is the physical counterpart of a collection( or a collection shard if the collection is fragmented) /Solr Cluster /: It is a group of Solr Instances which collaborates through the supervision of Apache zookeeper instance(s) [1] https://lucene.apache.org/solr/guide/6_6/how-solrcloud-works.html ----- --------------- Alessandro Benedetti Search Consultant, R&D Software Engineer, Director Sease Ltd. - www.sease.io -- Sent from: http://lucene.472066.n3.nabble.com/Solr-User-f472068.html
