Ceph Jewel Deep Scrub IO Op Latencies - osd_op_queue = prio

Note: when CPU util and various latencies are flat, no deep scrubs are occuring. The OSD drives are Seagate Archive SMR drives (we are not seeking any advice on choice of HDDs :) ) OSD journals are on NVRAM PCI-E cards.

ceph_cpu_util.png




ceph_io_time.png




ceph_io_read_time.png




ceph_io_write_time.png

It seems SMR drives are doing interesting write things based on this calculation ending up above 1.



ceph_osd_client_read_latencies.png




ceph_osd_client_write_latencies.png




ceph_osd_journal_latencies.png




ceph_osd_commit_latencies.png




ceph_osd_apply_latencies.png