Appendix G. Ceph Monitor and OSD configuration options
When modifying heartbeat settings, include them in the [global] section of the Ceph configuration file.
- mon_osd_min_up_ratio
- Description
-
The minimum ratio of
upCeph OSD Daemons before Ceph will mark Ceph OSD Daemonsdown. - Type
- Double
- Default
-
.3
- mon_osd_min_in_ratio
- Description
-
The minimum ratio of
inCeph OSD Daemons before Ceph will mark Ceph OSD Daemonsout. - Type
- Double
- Default
-
0.75
- mon_osd_laggy_halflife
- Description
-
The number of seconds
laggyestimates will decay. - Type
- Integer
- Default
-
60*60
- mon_osd_laggy_weight
- Description
-
The weight for new samples in
laggyestimation decay. - Type
- Double
- Default
-
0.3
- mon_osd_laggy_max_interval
- Description
-
Maximum value of
laggy_intervalin laggy estimations (in seconds). The monitor uses an adaptive approach to evaluate thelaggy_intervalof a certain OSD. This value will be used to calculate the grace time for that OSD. - Type
- Integer
- Default
-
300
- mon_osd_adjust_heartbeat_grace
- Description
-
If set to
true, Ceph will scale based onlaggyestimations. - Type
- Boolean
- Default
-
true
- mon_osd_adjust_down_out_interval
- Description
-
If set to
true, Ceph will scaled based onlaggyestimations. - Type
- Boolean
- Default
-
true
- mon_osd_auto_mark_in
- Description
-
Ceph will mark any booting Ceph OSD Daemons as
inthe Ceph Storage Cluster. - Type
- Boolean
- Default
-
false
- mon_osd_auto_mark_auto_out_in
- Description
-
Ceph will mark booting Ceph OSD Daemons auto marked
outof the Ceph Storage Cluster asinthe cluster. - Type
- Boolean
- Default
-
true
- mon_osd_auto_mark_new_in
- Description
-
Ceph will mark booting new Ceph OSD Daemons as
inthe Ceph Storage Cluster. - Type
- Boolean
- Default
-
true
- mon_osd_down_out_interval
- Description
-
The number of seconds Ceph waits before marking a Ceph OSD Daemon
downandoutif it does not respond. - Type
- 32-bit Integer
- Default
-
600
- mon_osd_downout_subtree_limit
- Description
-
The largest CRUSH unit type that Ceph will automatically mark
out. - Type
- String
- Default
-
rack
- mon_osd_reporter_subtree_level
- Description
-
This setting defines the parent CRUSH unit type for the reporting OSDs. The OSDs send failure reports to the monitor if they find an unresponsive peer. The monitor may mark the reported OSD
downand thenoutafter a grace period. - Type
- String
- Default
-
host
- mon_osd_report_timeout
- Description
-
The grace period in seconds before declaring unresponsive Ceph OSD Daemons
down. - Type
- 32-bit Integer
- Default
-
900
- mon_osd_min_down_reporters
- Description
-
The minimum number of Ceph OSD Daemons required to report a
downCeph OSD Daemon. - Type
- 32-bit Integer
- Default
-
2
- osd_heartbeat_address
- Description
- An Ceph OSD Daemon’s network address for heartbeats.
- Type
- Address
- Default
- The host address.
- osd_heartbeat_interval
- Description
- How often an Ceph OSD Daemon pings its peers (in seconds).
- Type
- 32-bit Integer
- Default
-
6
- osd_heartbeat_grace
- Description
-
The elapsed time when a Ceph OSD Daemon has not shown a heartbeat that the Ceph Storage Cluster considers it
down. - Type
- 32-bit Integer
- Default
-
20
- osd_mon_heartbeat_interval
- Description
- How often the Ceph OSD Daemon pings a Ceph Monitor if it has no Ceph OSD Daemon peers.
- Type
- 32-bit Integer
- Default
-
30
- osd_mon_report_interval_max
- Description
- The maximum time in seconds that a Ceph OSD Daemon can wait before it must report to a Ceph Monitor.
- Type
- 32-bit Integer
- Default
-
120
- osd_mon_report_interval_min
- Description
- The minimum number of seconds a Ceph OSD Daemon may wait from startup or another reportable event before reporting to a Ceph Monitor.
- Type
- 32-bit Integer
- Default
-
5 - Valid Range
-
Should be less than
osd mon report interval max
- osd_mon_ack_timeout
- Description
- The number of seconds to wait for a Ceph Monitor to acknowledge a request for statistics.
- Type
- 32-bit Integer
- Default
-
30
