[ceph-users] Question about erasure code

Hi, we are planning to use EC I have  3 questions about it 1 / what is the advantage of having more machines than (k + m)? We are planning to have 11 nodes and use k=8 and m=3. does it improved performance to have more node than K+M? of how many ? what ratio? 2 / what behavior should we expect if we lose 1,2 or 3 nodes: perfs / recovery. how many nodes could we loose before the cluster state change to read only 3 / what is the maximum occupancy rate on the EC? Thans for your help Zorg