[ceph-users] Re: mclock scheduler kills clients IOs

Hi Denis, we observed the same behaviour here. The cause was that the number of iops discovered at OSD startup was way too high. In our setup the rocksdb is on flash. When I set osd_mclock_max_capacity_iops_hdd to a value that the HDDs could handle, the situation was resolved, clients got ther fair share of IO. Hope this helps, Daniel -- Daniel Schreiber Facharbeitsgruppe Systemsoftware Universitaetsrechenzentrum Technische Universität Chemnitz Straße der Nationen 62 (Raum B303) 09111 Chemnitz Germany Tel: +49 371 531 35444