.TH "MOUNT.CEPH" "8" "September 22, 2011" "dev" "Ceph"
.SH NAME
mount.ceph \- mount a ceph file system
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.SH SYNOPSIS
.nf
\fBmount.ceph\fP \fImonaddr1\fP[,\fImonaddr2\fP,...]:/[\fIsubdir\fP] \fIdir\fP [
\-o \fIoptions\fP ]
.fi
.sp
.SH DESCRIPTION
.sp
\fBmount.ceph\fP is a simple helper for mounting the Ceph file system on
a Linux host. The only real purpose it serves is to resolve monitor
hostname(s) into IP addresses; the Linux kernel client component does
most of the real work. In fact, it is possible to mount a Ceph file
system without mount.ceph by specifying monitor address(es) by IP:
.sp
.nf
.ft C
mount \-t ceph 1.2.3.4:/ mountpoint
.ft P
.fi
.sp
Each monitor address monaddr takes the form host[:port]. If the port
is not specified, the Ceph default of 6789 is assumed.
.sp
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.
.sp
A subdirectory subdir may be specified if a subset of the file system
is to be mounted.
.SH OPTIONS
.INDENT 0.0
.TP
.B \fBwsize\fP
int, max write size. Default: none (writeback uses smaller of wsize
and stripe unit)
.TP
.B \fBrsize\fP
int (bytes), max readahead, multiple of 1024, Default: 524288
(512*1024)
.TP
.B \fBosdtimeout\fP
int (seconds), Default: 60
.TP
.B \fBosdkeepalivetimeout\fP
int, Default: 5
.TP
.B \fBmount_timeout\fP
int (seconds), Default: 60
.TP
.B \fBosd_idle_ttl\fP
int (seconds), Default: 60
.TP
.B \fBcaps_wanted_delay_min\fP
int, cap release delay, Default: 5
.TP
.B \fBcaps_wanted_delay_max\fP
int, cap release delay, Default: 60
.TP
.B \fBcap_release_safety\fP
int, Default: calculated
.TP
.B \fBreaddir_max_entries\fP
int, Default: 1024
.TP
.B \fBreaddir_max_bytes\fP
int, Default: 524288 (512*1024)
.TP
.B \fBwrite_congestion_kb\fP
int (kb), max writeback in flight. scale with available
memory. Default: calculated from available memory
.TP
.B \fBsnapdirname\fP
string, set the name of the hidden snapdir. Default: .snap
.TP
.B \fBname\fP
string, used with authx, Default: guest
.TP
.B \fBsecret\fP
string, used with authx
.TP
.B \fBip\fP
my ip
.TP
.B \fBnoshare\fP
create a new client instance, instead of sharing an existing
instance of a client mounting the same cluster
.TP
.B \fBdirstat\fP
funky \fIcat dirname\fP for stats, Default: off
.TP
.B \fBnodirstat\fP
no funky \fIcat dirname\fP for stats
.TP
.B \fBrbytes\fP
Report the recursive size of the directory contents for st_size on
directories.  Default: on
.TP
.B \fBnorbytes\fP
Do not report the recursive size of the directory contents for
st_size on directories.
.TP
.B \fBnocrc\fP
no data crc on writes
.TP
.B \fBnoasyncreaddir\fP
no dcache readdir
.UNINDENT
.SH EXAMPLES
.sp
Mount the full file system:
.sp
.nf
.ft C
mount.ceph monhost:/ /mnt/foo
.ft P
.fi
.sp
If there are multiple monitors:
.sp
.nf
.ft C
mount.ceph monhost1,monhost2,monhost3:/ /mnt/foo
.ft P
.fi
.sp
If \fBceph\-mon\fP(8) is running on a non\-standard
port:
.sp
.nf
.ft C
mount.ceph monhost1:7000,monhost2:7000,monhost3:7000:/ /mnt/foo
.ft P
.fi
.sp
To mount only part of the namespace:
.sp
.nf
.ft C
mount.ceph monhost1:/some/small/thing /mnt/thing
.ft P
.fi
.sp
Assuming mount.ceph(8) is installed properly, it should be
automatically invoked by mount(8) like so:
.sp
.nf
.ft C
mount \-t ceph monhost:/ /mnt/foo
.ft P
.fi
.SH AVAILABILITY
.sp
\fBmount.ceph\fP is part of the Ceph distributed file system. Please
refer to the Ceph wiki at \fI\%http://ceph.newdream.net/wiki\fP for more
information.
.SH SEE ALSO
.sp
\fBceph\-fuse\fP(8),
\fBceph\fP(8)
.SH COPYRIGHT
2011, New Dream Network
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