NAME

       mount.ceph - mount a ceph file system

SYNOPSIS

       mount.ceph monaddr1[,monaddr2,...]:/[subdir] dir [
       -o options ]

DESCRIPTION

       mount.ceph  is  a  simple  helper for mounting the Ceph file system on a Linux host. It serves to resolve
       monitor hostname(s) into IP addresses and read authentication keys from disk;  the  Linux  kernel  client
       component  does  most  of  the  real work. In fact, it is possible to mount a non-authenticated Ceph file
       system without mount.ceph by specifying monitor address(es) by IP:

          mount -t ceph 1.2.3.4:/ mountpoint

       Each monitor address monaddr takes the form host[:port]. If the port is not specified, the  Ceph  default
       of 6789 is assumed.

       Multiple  monitor  addresses  can  be  separated  by  commas.  Only  one responsible monitor is needed to
       successfully mount; the client will learn about all monitors from any responsive monitor. However, it  is
       a good idea to specify more than one in case one happens to be down at the time of mount.

       A subdirectory subdir may be specified if a subset of the file system is to be mounted.

       Mount  helper  application  conventions  dictate  that the first two options are device to be mounted and
       destination path. Options must be passed only after these fixed arguments.

OPTIONS

       wsize  int (bytes), max write size. Default: none (writeback uses smaller of wsize and stripe unit)

       rsize  int (bytes), max read size. Default: none

       rasize int (bytes), max readahead, multiple of 1024, Default: 8388608 (8192*1024)

       osdtimeout
              int (seconds), Default: 60

       osdkeepalive
              int, Default: 5

       mount_timeout
              int (seconds), Default: 60

       osd_idle_ttl
              int (seconds), Default: 60

       caps_wanted_delay_min
              int, cap release delay, Default: 5

       caps_wanted_delay_max
              int, cap release delay, Default: 60

       cap_release_safety
              int, Default: calculated

       readdir_max_entries
              int, Default: 1024

       readdir_max_bytes
              int, Default: 524288 (512*1024)

       write_congestion_kb
              int (kb), max writeback in flight. scale with available memory. Default: calculated from available
              memory

       snapdirname
              string, set the name of the hidden snapdir. Default: .snap

       name   RADOS user to authenticate as when using cephx. Default: guest

       secret secret key for use with cephx. This option is insecure  because  it  exposes  the  secret  on  the
              command line. To avoid this, use the secretfile option.

       secretfile
              path to file containing the secret key to use with cephx

       ip     my ip

       noshare
              create  a  new  client  instance, instead of sharing an existing instance of a client mounting the
              same cluster

       dirstat
              funky cat dirname for stats, Default: off

       nodirstat
              no funky cat dirname for stats

       rbytes Report the recursive size of the directory contents for st_size on directories.  Default: on

       norbytes
              Do not report the recursive size of the directory contents for st_size on directories.

       nocrc  no data crc on writes

       noasyncreaddir
              no dcache readdir

EXAMPLES

       Mount the full file system:

          mount.ceph monhost:/ /mnt/foo

       If there are multiple monitors:

          mount.ceph monhost1,monhost2,monhost3:/ /mnt/foo

       If ceph-mon(8) is running on a non-standard port:

          mount.ceph monhost1:7000,monhost2:7000,monhost3:7000:/ /mnt/foo

       To mount only part of the namespace:

          mount.ceph monhost1:/some/small/thing /mnt/thing

       Assuming mount.ceph(8) is installed properly, it should be automatically invoked by mount(8) like so:

          mount -t ceph monhost:/ /mnt/foo

AVAILABILITY

       mount.ceph 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-fuse(8), ceph(8)

COPYRIGHT

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

dev                                               Apr 19, 2023                                     MOUNT.CEPH(8)