Hello, I've just upgraded a Pacific cluster into Quincy, and all my osd have the low value osd_mclock_max_capacity_iops_hdd : 315.000000. The manuel does not explain how to benchmark the OSD with fio or ceph bench with good options. Can someone have the good ceph bench options or fio options in order to configure osd_mclock_max_capacity_iops_hdd for each osd ? I ran this bench various times on the same OSD (class hdd) and I obtain different results. ceph tell ${osd} cache drop ceph tell ${osd} bench 12288000 4096 4194304 100 example : osd.21 (hdd): osd_mclock_max_capacity_iops_hdd = 315.000000 bench 1 : 3006.2271379745534 bench 2 : 819.503206458996 bench 3 : 946.5406320134085 How can I succeed in getting the good values for the osd_mclock_max_capacity_iops_[hdd|ssd] options ? Thank you for your help, Rafael