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+[global]
+
+ # By default, Ceph makes three replicas of RADOS objects. If you want
+ # to maintain 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'. If you want to allow Ceph to accept an I/O
+ # operation to a degraded PG, set 'osd_pool_default_min_size' to a
+ # number less than the 'osd_pool_default_size' value.
+
+ osd_pool_default_size = 3 # Write an object three times.
+ osd_pool_default_min_size = 2 # Accept an I/O operation to a PG that has two copies of an object.
+
+ # Note: by default, PG autoscaling is enabled and this value is used only
+ # in specific circumstances. It is however still recommend to set it.
+ # Ensure you have a realistic number of placement groups. We recommend
+ # approximately 100 per OSD. E.g., total number of OSDs multiplied by 100
+ # divided by the number of replicas (i.e., 'osd_pool_default_size'). So for
+ # 10 OSDs and 'osd_pool_default_size' = 4, we'd recommend approximately
+ # (100 * 10) / 4 = 250.
+ # Always use the nearest power of two.
+ osd_pool_default_pg_num = 256