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+
+======================================================
+ ceph-bluestore-tool -- bluestore administrative tool
+======================================================
+
+.. program:: ceph-bluestore-tool
+
+Synopsis
+========
+
+| **ceph-bluestore-tool** *command*
+  [ --dev *device* ... ]
+  [ --path *osd path* ]
+  [ --out-dir *dir* ]
+  [ --log-file | -l *filename* ]
+  [ --deep ]
+| **ceph-bluestore-tool** fsck|repair --path *osd path* [ --deep ]
+| **ceph-bluestore-tool** show-label --dev *device* ...
+| **ceph-bluestore-tool** prime-osd-dir --dev *device* --path *osd path*
+| **ceph-bluestore-tool** bluefs-export --path *osd path* --out-dir *dir*
+| **ceph-bluestore-tool** bluefs-export --path *osd path* --out-dir *dir*
+
+
+Description
+===========
+
+**ceph-bluestore-tool** is a utility to perform low-level administrative
+operations on a BlueStore instance.
+
+Commands
+========
+
+.. option:: help
+
+   show help
+
+.. option:: fsck
+
+   run consistency check on BlueStore metadata.  If *--deep* is specified, also read all object data and verify checksums.
+
+.. option:: repair
+
+   Run a consistency check *and* repair any errors we can.
+
+.. option:: bluefs-export
+
+   Export the contents of BlueFS (i.e., rocksdb files) to an output directory.
+
+.. option:: bluefs-bdev-sizes --path *osd path*
+
+   Print the device sizes, as understood by BlueFS, to stdout.
+
+.. option:: bluefs-bdev-expand --path *osd path*
+
+   Instruct BlueFS to check the size of its block devices and, if they have expanded, make use of the additional space.
+
+.. option:: show-label --dev *device* [...]
+
+   Show device label(s).	   
+
+Options
+=======
+
+.. option:: --dev *device*
+
+   Add *device* to the list of devices to consider
+
+.. option:: --path *osd path*
+
+   Specify an osd path.  In most cases, the device list is inferred from the symlinks present in *osd path*.  This is usually simpler than explicitly specifying the device(s) with --dev.
+
+.. option:: --out-dir *dir*
+
+   Output directory for bluefs-export
+
+.. option:: -l, --log-file *log file*
+
+   file to log to
+
+.. option:: --log-level *num*
+
+   debug log level.  Default is 30 (extremely verbose), 20 is very
+   verbose, 10 is verbose, and 1 is not very verbose.
+
+.. option:: --deep
+
+   deep scrub/repair (read and validate object data, not just metadata)
+
+Device labels
+=============
+
+Every BlueStore block device has a single block label at the beginning of the
+device.  You can dump the contents of the label with::
+
+  ceph-bluestore-tool show-label --dev *device*
+
+The main device will have a lot of metadata, including information
+that used to be stored in small files in the OSD data directory.  The
+auxilliary devices (db and wal) will only have the minimum required
+fields (OSD UUID, size, device type, birth time).
+
+OSD directory priming
+=====================
+
+You can generate the content for an OSD data directory that can start up a
+BlueStore OSD with the *prime-osd-dir* command::
+
+  ceph-bluestore-tool prime-osd-dir --dev *main device* --path /var/lib/ceph/osd/ceph-*id*
+
+
+Availability
+============
+
+**ceph-bluestore-tool** 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-osd <ceph-osd>`\(8)