.TH COSD 8
.SH NAME
cosd \- ceph object storage daemon
.SH SYNOPSIS
.B cosd
\fIdatapath\fP
[ \fB\-j\fI journal\fP ]
[ \fB\-c\fI ceph.conf\fP ]
[ \fB\-\-mkfs_for_osd\fI nodeid\fP ]
.SH DESCRIPTION
.B cosd
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.
.PP
The \fIdatapath\fP argument should be a directory on a btrfs file
system where the object data resides.  The \fIjournal\fP is optional,
and is only useful performance-wise when it resides on a different
disk than \fIdatapath\fP with low latency (ideally, an NVRAM device).
.SH OPTIONS
.TP
\fB\-D\fP
Debug mode: do not daemonize after startup (run in foreground) and send log output
to stdout.
.TP
\fB\-f\fP
do not daemonize after startup (run in foreground), but log to the usual location.
Useful when run via 
.BR crun (8).
.TP
\fB\-j\fI journal\fP
Journal updates to \fIjournal\fP.
.TP
\fB\-\-mkfs_for_osd\fI nodeid\fP
Create an empty object repository for OSD number \fInodeid\fP.  Normally
invoked by
.BR mkcephfs (8).
.TP
\fB\-c\fI ceph.conf\fR or \fB\-\-conf_file\fI ceph.conf\fP
Use \fIceph.conf\fP configuration file instead of the default \fI/etc/ceph/ceph.conf\fP
for runtime configuration options.
.SH AVAILABILITY
.B cosd
is part of the Ceph distributed file system.  Please refer to the Ceph wiki at
http://ceph.newdream.net/wiki for more information.
.SH SEE ALSO
.BR ceph (8),
.BR cmds (8),
.BR cmon (8)