Hi, I'm investigating using SolrCloud for querying documents of different but similar/related types, and have read through docs. on the wiki and done many searches in these archives, but still have some questions. Thanks in advance for your help.
Setup: * Say that I have N distinct types of documents and I want to do queries that return the best matches regardless document type. I.e., something akin to a Google search where I'd like to get the best matches from the web, news, images, and maps. * Our main use case is supporting simple user-entered searches, which would just contain terms / phrases and wouldn't specify fields. * The document types will not all have the same fields, though there may be some overlap in the fields. * We plan to use a separate collection for each document type, and to use the eDisMax query parser. Each collection would have a document-specific schema configuration with appropriate defaults for query fields and boosts, etc. Questions: * Would the above setup qualify as "multiple compatible collections", such that we could search all N collections with a single SolrCloud query, as in the example query " http://localhost:8983/solr/collection1/select?q=apple%20pie&collection=c1,c2,...,cN";? Again, we're not querying against specific fields. * How does SolrCloud combine the query results from multiple collections? Does it re-sort the combined result set, or does it just return the concatenation of the (unmerged) results from each of the collections? * Does SolrCloud impose any restrictions on querying multiple, sharded collections? I know it supports querying say all 3 shards of a single collection, so want to make sure it would also support say all Nx3 shards of N collections. * When SolrCloud queries multiple shards/collections, it queries them concurrently vs. serially, correct? thanks much, Chris
