Hi Lance and Tirthankar, We are currently using Solr 3.6. I tried a search across our current 12 shards grouping by book id (record_no in our schema) and it seems to work fine (the query with the actual urls for the shards changed is appended below.)
I then searched for the record_no of the second group in the results to confirm that the number of records being folded is correct. In both cases the numFound is 505 so it seems as though the record counts for the group are correct. Then I tried the same search but changed the shards parameter to limit the search to 1/2 of the shards and got numFound = 325. This shows that the items in the group are distributed between different shards. What am I missing here? What is it that you are saying does not work? Tom Field Collapse query ( IP address changed, and newlines added and shard urls simplified for readability) http://solr-myhost.edu/serve-9/select?indent=on&version=2.2 &shards=shard1,shard2,shard3, shard4,shard5, shard,6,...shard12 &q=title:nature&fq=&start=0&rows=10&fl=id,author,title,volume_enumcron,score &group=true&group.field=record_no&group.limit=2
