osd laggy algorithm

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hello.
ceph transfers osd node in the down status by default , after receiving 3 reports about disabled nodes. Reports are sent per   "osd heartbeat grace" seconds, but the settings of "mon_osd_adjust_heartbeat_gratse = true, mon_osd_adjust_down_out_interval = true" timeout to transfer nodes in down status may vary. Tell me please: what algorithm enables changes timeout for the transfer nodes occur in down/out status and which parameters are affected?
thanks.

--
Artem
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