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Ceph Cookbook - Second Edition by Karan Singh, Michael Hackett, Vikhyat Umrao

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Tuning Monitor

The monitor tuning parameters should be defined under the [mon] section of your Ceph cluster configuration file as follows:

  • mon_osd_down_out_interval: This is the number of seconds Ceph waits before marking a Ceph OSD daemon as down and out if it doesn't respond. This option comes in handy when your OSD nodes crash and reboot by themselves or after some short glitch in the network. You don't want your cluster to start rebalancing as soon as the problem comes, rather, for it to wait for a few minutes and see if the problem gets fixed (default 300):
        mon_osd_down_out_interval = 600
  • mon_allow_pool_delete: To avoid the accidental deletion of the Ceph pool, set this parameter as false. This can be useful if you have many administrators ...

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