mirror of
https://github.com/ceph/ceph
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154 lines
3.6 KiB
ReStructuredText
154 lines
3.6 KiB
ReStructuredText
========================================
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mount.ceph -- mount a ceph file system
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========================================
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.. program:: mount.ceph
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Synopsis
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========
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| **mount.ceph** *monaddr1*\ [,\ *monaddr2*\ ,...]:/[*subdir*] *dir* [
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-o *options* ]
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Description
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===========
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**mount.ceph** is a simple helper for mounting the Ceph file system on
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a Linux host. The only real purpose it serves is to resolve monitor
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hostname(s) into IP addresses; the Linux kernel client component does
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most of the real work. In fact, it is possible to mount a Ceph file
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system without mount.ceph by specifying monitor address(es) by IP::
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mount -t ceph 1.2.3.4:/ mountpoint
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Each monitor address monaddr takes the form host[:port]. If the port
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is not specified, the Ceph default of 6789 is assumed.
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Multiple monitor addresses can be separated by commas. Only one
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responsible monitor is needed to successfully mount; the client will
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learn about all monitors from any responsive monitor. However, it is a
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good idea to specify more than one in case one happens to be down at
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the time of mount.
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A subdirectory subdir may be specified if a subset of the file system
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is to be mounted.
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Options
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=======
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:command:`wsize`
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int, max write size. Default: none (writeback uses smaller of wsize
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and stripe unit)
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:command:`rsize`
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int (bytes), max readahead, multiple of 1024, Default: 524288
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(512*1024)
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:command:`osdtimeout`
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int (seconds), Default: 60
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:command:`osdkeepalivetimeout`
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int, Default: 5
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:command:`mount_timeout`
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int (seconds), Default: 60
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:command:`osd_idle_ttl`
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int (seconds), Default: 60
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:command:`caps_wanted_delay_min`
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int, cap release delay, Default: 5
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:command:`caps_wanted_delay_max`
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int, cap release delay, Default: 60
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:command:`cap_release_safety`
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int, Default: calculated
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:command:`readdir_max_entries`
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int, Default: 1024
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:command:`readdir_max_bytes`
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int, Default: 524288 (512*1024)
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:command:`write_congestion_kb`
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int (kb), max writeback in flight. scale with available
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memory. Default: calculated from available memory
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:command:`snapdirname`
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string, set the name of the hidden snapdir. Default: .snap
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:command:`name`
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string, used with authx, Default: guest
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:command:`secret`
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string, used with authx
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:command:`ip`
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my ip
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:command:`noshare`
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create a new client instance, instead of sharing an existing
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instance of a client mounting the same cluster
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:command:`dirstat`
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funky `cat dirname` for stats, Default: off
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:command:`nodirstat`
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no funky `cat dirname` for stats
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:command:`rbytes`
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Report the recursive size of the directory contents for st_size on
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directories. Default: on
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:command:`norbytes`
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Do not report the recursive size of the directory contents for
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st_size on directories.
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:command:`nocrc`
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no data crc on writes
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:command:`noasyncreaddir`
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no dcache readdir
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Examples
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========
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Mount the full file system::
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mount.ceph monhost:/ /mnt/foo
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If there are multiple monitors::
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mount.ceph monhost1,monhost2,monhost3:/ /mnt/foo
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If cmon(8) is running on a non-standard port::
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mount.ceph monhost1:7000,monhost2:7000,monhost3:7000:/ /mnt/foo
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To mount only part of the namespace::
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mount.ceph monhost1:/some/small/thing /mnt/thing
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Assuming mount.ceph(8) is installed properly, it should be
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automatically invoked by mount(8) like so::
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mount -t ceph monhost:/ /mnt/foo
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Availability
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============
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**mount.ceph** is part of the Ceph distributed file system. Please
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refer to the Ceph wiki at http://ceph.newdream.net/wiki for more
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information.
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See also
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========
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:doc:`ceph-fuse <ceph-fuse>`\(8),
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:doc:`ceph <ceph>`\(8)
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