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@Alwin: Thanks for your help. We did our pool 4/3 size, but it still doesn't worked like we expected. This is our test: We have one pool with 8 osds - size 4, min_size 3. We disable ens2f1 (cluster interface 10G) and put the command on other node: rados bench -p SATA 60 write --no-cleanup...

When we changed the number of mi_size from 2 to 3, doesn't change the performance of write/read speed when 1 node goes down.

Hello, we have the same problem. We have 4 node cluster with ceph and HA for VMs. When 4 nodes are up, performance is good: Object prefix: benchmark_data_vm-host5_509634 sec Cur ops started finished avg MB/s cur MB/s last lat(s) avg lat(s) 0 0 0 0 0...