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

       osdkeepalivetimeout
              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

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