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

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OSD recovery settings

These settings should be used when you want performance over-recovery or vice versa. If your Ceph cluster is unhealthy and is under recovery, you might not get its usual performance, as the OSDs will be busy with recovery. If you still prefer performance over recovery, you can reduce the recovery priority to keep OSDs less occupied with recovery. You can also set these values if you want a quick recovery for your cluster, helping the OSDs to perform recovery faster:

  • osd_recovery_max_active: The number of active recovery requests per OSD at a given moment:
        osd_recovery_max_active = 1
  • osd_recovery_max_single_start: This is used in conjunction with osd_recovery_max_active. To understand this, let's assume osd_recovery_max_single_start ...

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