Yes, I am using SolrCloud. So lets say I have a 2 host cluster with 2 collections and 1 shard 1 replica for each collection.
Host-1(10.0.0.111) -solr/ -collectionAAA_shard1_replica1/ -collectionBBB_shard1_replica1/ Host-2:(10.0.0.222) -solr/ -collectionAAA_shard1_replica2/ -collectionBBB_shard1_replica2/ So, if my understanding of term "core" is correct, then I have 4 cores in total. That means while indexing 8 IndexWriter can be opened at one time per core. That means 16 IndexWriter per host. Please let me know if I got this correct. Thanks, Saumitra -- View this message in context: http://lucene.472066.n3.nabble.com/Solr-maxIndexingThreads-tp4109604p4109670.html Sent from the Solr - User mailing list archive at Nabble.com.