On Thu, 2015-08-27 at 13:16 +0300, Esther Goldbraich wrote: > Yes, 64 collections / 1 shard is compared to 1 collection / 64 shards > (with router.name=compositeId) on Solr 5. > Quering with "_route_" should not eliminate distributed search overhead?
Caveat: I am guessing a bit here. When you specify a _route_, the request goes to one or more shards (as you can specify more than one _route_): https://cwiki.apache.org/confluence/display/solr/Advanced+Distributed +Request+Options#AdvancedDistributedRequestOptions-RoutingParameters When a distributed facet request is issued, over-provisioning of the result set is used (FacetComponene#modifyRequestForFieldFacets). I do not know if Solr is smart enough to recognize a shards-list of length 1 as a non-distributed call. You should be able to verify this in your Solr-log: Look for facet.limit and see if it matches the limit you requested or if it is higher (default formula is limit * 1.5 + 10). The rest of your questions are too far outside of my knowledge for me to try and answer. - Toke Eskildsen, State and University Library, Denmark
