bionic (8) ceph-osd.8.gz

Provided by: ceph-osd_12.2.13-0ubuntu0.18.04.11_amd64 bug

NAME
       ceph-osd - ceph object storage daemon


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
       -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-wants-journal
              Check whether a journal is desired.

       --check-allows-journal
              Check whether a journal is allowed.

       --check-needs-journal
              Check whether a journal is required.

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

       --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 ceph-authtool(8).

       --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.

       --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.

       --get-cluster-fsid
              Print the cluster fsid (uuid) and exit.

       --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.

       --get-journal-fsid
              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.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
       ceph(8), ceph-mds(8), ceph-mon(8), ceph-authtool(8)


       2010-2023,  Inktank  Storage,  Inc.  and  contributors. Licensed under Creative Commons Attribution Share
       Alike 3.0 (CC-BY-SA-3.0)