I am creating 3 node cluster having 2 dc . planning configuration as dc1=2 node (1 seed and 1 node) and dc2=(1 solr node ) . As per datastax documentation for solr recommended num token value is 8 and one note is there like ensure that allocate_tokens_for_local_replication_factor option in cassandra.yaml is correctly configured for your environment can you please explain what exactly need to configure ( i will use RF dc1=2 , dc2=1 along with network strategy) . this is confusing me like do we need to use allocation algorithm while creating new cluster or this is only applicable while adding new node to existing cluster. could you please guide what should i configure to avoid future unbalence in cluster .