state of the placement group. However, completion of the peering process does
**NOT** mean that each replica has the latest contents.
-.. topic:: Authoratative History
+.. topic:: Authoritative History
Ceph will **NOT** acknowledge a write operation to a client, until
all OSDs of the acting set persist the write operation. This practice
``osd_max_backfills`` sets the maximum number of concurrent backfills to or from
an OSD to 10. The ``backfill full ratio`` enables an OSD to refuse a
backfill request if the OSD is approaching its full ratio (90%, by default) and
-change with ``ceph osd set-backfillfull-ratio`` comand.
+change with ``ceph osd set-backfillfull-ratio`` command.
If an OSD refuses a backfill request, the ``osd backfill retry interval``
enables an OSD to retry the request (after 10 seconds, by default). OSDs can
also set ``osd backfill scan min`` and ``osd backfill scan max`` to manage scan