How does Ceph implement its QoS (Quality of Service) mechanisms?

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https://docs.ceph.com/en/latest/rados/configuration/mclock-config-ref/IOPS（每秒输入/输出操作数）加权优先级队列（WPQ）osd_mclock_scheduler_client_resosd_mclock_scheduler_client_wgtosd_mclock_scheduler_client_lim

docs.ceph.com/en/latest/rados/configuration/mclock-config-ref/

IOPS (input/outputoperations per second)

Weighted Priority Queue (WPQ)

osd_mclock_scheduler_client_res

osd_mclock_scheduler_client_wgt

osd_mclock_scheduler_client_lim

osd_mclock_scheduler_background_recovery_res

osd_mclock_scheduler_background_recovery_wgt

osd_mclock_scheduler_background_recovery_lim

osd_mclock_scheduler_background_best_effort_res

osd_mclock_scheduler_background_best_effort_wgt

osd_mclock_scheduler_background_best_effort_lim

cmd：

#change the client reservation IOPS ratio for a specific OSD ceph config set osd.0 osd_mclock_scheduler_client_res 0.5

#The following command can be used to switch to the custom profile: ceph config set osd osd_mclock_profile custom