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CEPH-OSD(8)			     Ceph			   CEPH-OSD(8)

       ceph-osd	- ceph object storage daemon

       ceph-osd	-i osdnum [ --osd-data datapath	] [ --osd-journal
       journal ] [ --mkfs ] [ --mkjournal ] [--flush-journal] [--check-allows-journal] [--check-wants-journal] [--check-needs-journal] [ --mkkey ]

       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).

       -f, --foreground
	      Foreground: do not daemonize after startup (run in  foreground).
	      Do not generate a	pid file. Useful when run via ceph-run(8).

       -d     Debug mode: like -f, but also send all log output	to stderr.

       --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.

       --setgroup grouporgid
	      Set  gid after starting.	If a group name	is specified the group
	      record is	looked up to get a gid.

       --osd-data osddata
	      Use object store at osddata.

       --osd-journal journal
	      Journal updates to journal.

	      Check whether a journal is desired.

	      Check whether a journal is allowed.

	      Check whether a journal is required.

       --mkfs Create an	empty object repository.  This	also  initializes  the
	      journal (if one is defined).

	      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	ceph-authtool(8).

	      Create  a	 new  journal file to match an existing	object reposi-
	      tory.  This is useful if the journal device or file is wiped out
	      due to a disk or file system failure.

	      Flush  the  journal  to  permanent store.	This runs in the fore-
	      ground 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.

	      Print the	cluster	fsid (uuid) and	exit.

	      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.

	      Print the	journal's uuid.	 The journal fsid is set to match  the
	      OSD fsid at --mkfs time.

       -c ceph.conf, --conf=ceph.conf
	      Use   ceph.conf	configuration  file  instead  of  the  default
	      /etc/ceph/ceph.conf for runtime configuration options.

       -m monaddress[:port]
	      Connect  to  specified  monitor  (instead	 of  looking   through

       ceph-osd	 is  part of Ceph, a massively scalable, open-source, distrib-
       uted  storage  system.  Please  refer  to  the  Ceph  documentation  at for	more information.

       ceph(8),	ceph-mds(8), ceph-mon(8), ceph-authtool(8)

       2010-2014,  Inktank Storage, Inc. and contributors. Licensed under Cre-
       ative Commons Attribution Share Alike 3.0 (CC-BY-SA-3.0)

dev				 Aug 28, 2020			   CEPH-OSD(8)


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