Hi,
We have a quincy 17.2.5 based cluster, and we have some question
regarding the mclock iops scheduler.
Looking into the documentation, the default profile is the HIGH_CLIENT_OPS
that mean that 50% of IOPS for an OSD are reserved for clients operations.
But looking into OSD configuration settings, it seems that this is not
the case or probably there is something I don't understand.
ceph config get osd.0 osd_mclock_profile
high_client_ops
ceph config show osd.0 | grep mclock
osd_mclock_max_capacity_iops_hdd 22889.222997 mon
osd_mclock_scheduler_background_best_effort_lim 999999 default
osd_mclock_scheduler_background_best_effort_res 1144
default
osd_mclock_scheduler_background_best_effort_wgt 2 default
osd_mclock_scheduler_background_recovery_lim 4578
default
osd_mclock_scheduler_background_recovery_res 1144
default
osd_mclock_scheduler_background_recovery_wgt 1 default
osd_mclock_scheduler_client_lim 999999
default
osd_mclock_scheduler_client_res 2289
default
osd_mclock_scheduler_client_wgt 2 default
So i have osd_mclock_max_capacity_iops_hdd = 22889.222997 why
osd_mclock_scheduler_client_res is not 11444 ?
this value seem strange to me.
Kr
Philippe
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