initial code repo

[stor4nfv.git] / src / ceph / doc / rados / configuration / pool-pg.conf

diff --git a/src/ceph/doc/rados/configuration/pool-pg.conf b/src/ceph/doc/rados/configuration/pool-pg.conf
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+[global]
+
+       # By default, Ceph makes 3 replicas of objects. 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'.
+       # 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.
+
+       osd pool default size = 4  # Write an object 4 times.
+       osd pool default min size = 1 # Allow writing one copy in a degraded state.
+
+       # 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.
+
+       osd pool default pg num = 250
+       osd pool default pgp num = 250