If query comes to shard X on some node and this shard X is NOT a leader, but HAS data, it will just execute the query. If it needs to query shards on other nodes, it will have the info about which shards to query and will just do that and aggregate the results. It doesn't have to ask leader for permission, for info, etc. It can just do it because it knows where things are.
Otis -- Solr & ElasticSearch Support http://sematext.com/ On Tue, Apr 16, 2013 at 5:23 PM, Furkan KAMACI <furkankam...@gmail.com> wrote: > Hi Mark; > > When I speak with proper terms I want to ask that: is there a data locality > of spatial locality ( > http://www.roguewave.com/portals/0/products/threadspotter/docs/2011.2/manual_html_linux/manual_html/ch_intro_locality.html > - I mean if you have data on your machine, use it and don't search it > anywhere else, just search for remaining parts) at querying on a leader of > SolrCloud? > > 2013/4/16 Mark Miller <markrmil...@gmail.com> > >> Leaders don't have much to do with querying - the node that you query will >> determine what other nodes it has to query to search the whole index and do >> a scatter/gather for you. (Though in some cases that request can be proxied >> to another node) >> >> - Mark >> >> On Apr 16, 2013, at 7:48 AM, Furkan KAMACI <furkankam...@gmail.com> wrote: >> >> > When a leader responses for a query, does it says that: "If I have the >> data >> > what I am looking for, I should build response with it, otherwise I >> should >> > find it anywhere. Because it may be long to search it?" >> > or >> > does it says I only index the data, I will tell it to other guys to build >> > up the response query? >> >>
