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https://github.com/ceph/ceph
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71 lines
2.3 KiB
Groff
71 lines
2.3 KiB
Groff
.TH COSD 8
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.SH NAME
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cosd \- ceph object storage daemon
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.SH SYNOPSIS
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.B cosd
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\fB\-i \fIosdnum\fR
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[ \fB\-\-osd\-data \fIdatapath\fR ]
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[ \fB\-\-osd\-journal \fIjournal\fR ]
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[ \fB\-\-mkfs\fR ]
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[ \fB\-\-mkjournal\fR ]
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[ \fB\-\-mkkey\fR ]
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.SH DESCRIPTION
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.B cosd
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is the object storage daemon for the Ceph distributed file system.
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It is responsible for storing objects on a local file system and
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providing access to them over the network.
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.PP
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The \fIdatapath\fP argument should be a directory on a btrfs file
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system where the object data resides. The \fIjournal\fP is optional,
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and is only useful performance-wise when it resides on a different
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disk than \fIdatapath\fP with low latency (ideally, an NVRAM device).
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.SH OPTIONS
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.TP
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\fB\-f\fP, \fB\-\-foreground\fP
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Foreground: do not daemonize after startup (run in foreground).
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Do not generate a pid file. Useful when run via crun (8).
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.TP
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\fB\-d\fP
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Debug mode: like -f, but also send all log output to stderr.
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.TP
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\fB\-\-osd\-data \fIosddata\fP
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Use object store at \fIosddata\fP.
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.TP
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\fB\-\-osd\-journal \fIjournal\fP
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Journal updates to \fIjournal\fP.
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.TP
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\fB\-\-mkfs\fP
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Create an empty object repository. Normally invoked by
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.BR mkcephfs
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(8). This also initializes the jouranl (if one is defined).
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.TP
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\fB\-\-mkkey\fP
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Generate a new secret key. This is normally used in combination with \fB\-\-mkfs\fR
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as it is more convenient than generating a key by hand with \fIcauthtool\fR.
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.TP
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\fB\-\-mkjournal\fP
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Create a new journal file to match an existing object repository. This is useful if the journal
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device or file is wiped out due to a disk or file system failure.
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.TP
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\fB\-\-flush-journal
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Flush the journal to permanent store. This runs in the foreground so you
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know when it's completed.
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This can be useful if you want to resize the journal or need to otherwise
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destroy it: this guarantees you won't lose data.
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.TP
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\fB\-c\fI ceph.conf\fR, \fB\-\-conf=\fIceph.conf\fR
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Use \fIceph.conf\fP configuration file instead of the default \fI/etc/ceph/ceph.conf\fP
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for runtime configuration options.
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.TP
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\fB\-m\fI monaddress[:port]\fR
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Connect to specified monitor (instead of looking through \fIceph.conf\fR).
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.SH AVAILABILITY
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.B cosd
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is part of the Ceph distributed file system. Please refer to the Ceph wiki at
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http://ceph.newdream.net/wiki for more information.
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.SH SEE ALSO
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.BR ceph (8),
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.BR cmds (8),
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.BR cmon (8),
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.BR cauthtool (8)
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