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+:orphan:
+
+========================================
+ ceph-osd -- ceph object storage daemon
+========================================
+
+.. program:: ceph-osd
+
+Synopsis
+========
+
+| **ceph-osd** -i *osdnum* [ --osd-data *datapath* ] [ --osd-journal
+  *journal* ] [ --mkfs ] [ --mkjournal ] [--flush-journal] [--check-allows-journal] [--check-wants-journal] [--check-needs-journal] [ --mkkey ]
+
+
+Description
+===========
+
+**ceph-osd** is the object storage daemon for the Ceph distributed file
+system. It is responsible for storing objects on a local file system
+and providing access to them over the network.
+
+The datapath argument should be a directory on a xfs file system
+where the object data resides. The journal is optional, and is only
+useful performance-wise when it resides on a different disk than
+datapath with low latency (ideally, an NVRAM device).
+
+
+Options
+=======
+
+.. option:: -f, --foreground
+
+   Foreground: do not daemonize after startup (run in foreground). Do
+   not generate a pid file. Useful when run via :doc:`ceph-run <ceph-run>`\(8).
+
+.. option:: -d
+
+   Debug mode: like ``-f``, but also send all log output to stderr.
+
+.. option:: --setuser userorgid
+
+   Set uid after starting.  If a username is specified, the user
+   record is looked up to get a uid and a gid, and the gid is also set
+   as well, unless --setgroup is also specified.
+
+.. option:: --setgroup grouporgid
+
+   Set gid after starting.  If a group name is specified the group
+   record is looked up to get a gid.
+
+.. option:: --osd-data osddata
+
+   Use object store at *osddata*.
+
+.. option:: --osd-journal journal
+
+   Journal updates to *journal*.
+
+.. option:: --check-wants-journal
+
+   Check whether a journal is desired.
+
+.. option:: --check-allows-journal
+
+   Check whether a journal is allowed.
+
+.. option:: --check-needs-journal
+
+   Check whether a journal is required.
+
+.. option:: --mkfs
+
+   Create an empty object repository. This also initializes the journal
+   (if one is defined).
+
+.. option:: --mkkey
+
+   Generate a new secret key. This is normally used in combination
+   with ``--mkfs`` as it is more convenient than generating a key by
+   hand with :doc:`ceph-authtool <ceph-authtool>`\(8).
+
+.. option:: --mkjournal
+
+   Create a new journal file to match an existing object repository.
+   This is useful if the journal device or file is wiped out due to a
+   disk or file system failure.
+
+.. option:: --flush-journal
+
+   Flush the journal to permanent store. This runs in the foreground
+   so you know when it's completed. This can be useful if you want to
+   resize the journal or need to otherwise destroy it: this guarantees
+   you won't lose data.
+
+.. option:: --get-cluster-fsid
+
+   Print the cluster fsid (uuid) and exit.
+
+.. option:: --get-osd-fsid
+
+   Print the OSD's fsid and exit.  The OSD's uuid is generated at
+   --mkfs time and is thus unique to a particular instantiation of
+   this OSD.
+
+.. option:: --get-journal-fsid
+
+   Print the journal's uuid.  The journal fsid is set to match the OSD
+   fsid at --mkfs time.
+
+.. option:: -c ceph.conf, --conf=ceph.conf
+
+   Use *ceph.conf* configuration file instead of the default
+   ``/etc/ceph/ceph.conf`` for runtime configuration options.
+
+.. option:: -m monaddress[:port]
+
+   Connect to specified monitor (instead of looking through
+   ``ceph.conf``).
+
+
+Availability
+============
+
+**ceph-osd** is part of Ceph, a massively scalable, open-source, distributed storage system. Please refer to
+the Ceph documentation at http://ceph.com/docs for more information.
+
+See also
+========
+
+:doc:`ceph <ceph>`\(8),
+:doc:`ceph-mds <ceph-mds>`\(8),
+:doc:`ceph-mon <ceph-mon>`\(8),
+:doc:`ceph-authtool <ceph-authtool>`\(8)