[thumbnail="screenshot/gui-ceph-pools.png"]
A pool is a logical group for storing objects. It holds **P**lacement
-**G**roups (PG), a collection of objects.
+**G**roups (`PG`, `pg_num`), a collection of objects.
-When no options are given, we set a
-default of **128 PGs**, a **size of 3 replicas** and a **min_size of 2 replicas**
-for serving objects in a degraded state.
+When no options are given, we set a default of **128 PGs**, a **size of 3
+replicas** and a **min_size of 2 replicas** for serving objects in a degraded
+state.
NOTE: The default number of PGs works for 2-5 disks. Ceph throws a
-"HEALTH_WARNING" if you have too few or too many PGs in your cluster.
+'HEALTH_WARNING' if you have too few or too many PGs in your cluster.
It is advised to calculate the PG number depending on your setup, you can find
the formula and the PG calculator footnote:[PG calculator
Destroy CephFS
~~~~~~~~~~~~~~
-WARN: Destroying a CephFS will render all its data unusable, this cannot be
+WARNING: Destroying a CephFS will render all its data unusable, this cannot be
undone!
If you really want to destroy an existing CephFS you first need to stop, or
Then, you can remove (destroy) CephFS by issuing a:
----
-ceph rm fs NAME --yes-i-really-mean-it
+ceph fs rm NAME --yes-i-really-mean-it
----
on a single node hosting Ceph. After this you may want to remove the created
data and metadata pools, this can be done either over the Web GUI or the CLI