Query multiple collections with different fields in solr

Question

Given the following (single core) query\'s:

http://localhost/solr/a/select?indent=true&q=*:*&rows=100&start=0&wt=json
http://localhost/solr/b         


        

Answer 1

Shards should be used in Solr

When an index becomes too large to fit on a single system, or when a single query takes too long to execute

so the number and names of the columns should always be the same. This is specified in this document (where the previous quote also come from): http://wiki.apache.org/solr/DistributedSearch

If you leave your query as it is and make the two shards with the same fields this shoudl just work as expected.

If you want more info about how the shards work in SolrCould have a look at this docuemtn also: http://wiki.apache.org/solr/SolrCloud