Hello In scope of SOLR-16837 AffinityPlacementFactory obtained new property withCollectionSards. It allows to collocate shradN of one collection with shardN of another collection. The purpose is SOLR-16717 joining a sharded collection on both sides (will commit soon). Both should be released in 9.3. I would really appreciate it if you can check it in a snapshot and provide your feedback. Thanks!
-- Sincerely yours Mikhail Khludnev
