We are in the process of upgrading a single instance Solr 3 implementation to Solr 4. The instance contains multiple cores that share the same schema (in fact they share the same instanceDir but with distinct dataDirs). We also need the ability to perform cross-index queries. In Solr3 we have been using the shards parameter to do this in a manner similar to the following:
http://solr-box/core1/select?shards=http://solr-box/core2,http://solr-box/core3&q=. .. The above approach was taken from this blog article: http://blog.shutupandcode.net/?p=1136 Now, having setup a single instance solr4 server, we are trying the following: http://solr-box/core1/select?collection=core2,core3&q=... The query runs w/o error but only returns results from core1. The documentation seems to imply that the collection parameter will only work if we are using "SolrCloud" aka, solr w/zookeeper, etc. Since we only need one solr instance this seems overkill. Are we missing something? Is there way to just use a basic Solr4 setup and still query across collections? Thanks in advance for any help. If I left out needed details I will be happy to answer questions. --Ken
