Hi, I have a SolrCloud 6.0 setup and created my collection with a replication factor of 1. Now I want to increase the replication factor but would like the replicas for the same shard to be on different nodes, so that my collection does not fail when one node fails. I tried two approaches so far:
1) When I use the collections API with the MODIFYCOLLECTION action [1] I can set the replication factor but that did not result in the creation of additional replicas. The Solr Admin UI showed that my replication factor changed but otherwise nothing happened. A reload of the collection did also result in no change. 2) Using the ADDREPLICA action [2] from the collections API I have to add the replicas to the shard individually, which is a bit more complicated but otherwise worked. During testing this did however at least once result in the replica being created on the same node. My collection was split in 4 shards and for 2 of them all replicas ended up on the same node. So is the only option to create the replicas manually and also pick the nodes manually or is the perceived behavior wrong? regards, Hendrik [1] https://cwiki.apache.org/confluence/display/solr/Collections+API#CollectionsAPI-modifycoll [2] https://cwiki.apache.org/confluence/display/solr/Collections+API#CollectionsAPI-api_addreplica
