Issue a HEALTH_ERR in cluster log if the number of PGs stay Number of seconds after which PGs can be considered as Number of seconds between PG creation in the same The maximum number of placement groups per pool. osd pool default pg num = 250 osd pool default pgp num = 250 So for # 10 OSDs and osd pool default size = 4, we'd recommend approximately # (100 * 10) / 4 = 250. E.g., total number of OSDs multiplied by 100 # divided by the number of replicas (i.e., osd pool default size). We recommend # approximately 100 per OSD. # Ensure you have a realistic number of placement groups. osd pool default min size = 2 # Allow writing two copies in a degraded state. osd pool default size = 3 # Write an object 3 times. # If you want to allow Ceph to write a lesser number of copies in a degraded # state, set 'osd pool default min size' to a number less than the # 'osd pool default size' value. If you want to make four # copies of an object the default value-a primary copy and three replica # copies-reset the default values as shown in 'osd pool default size'. # By default, Ceph makes 3 replicas of objects.
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