mirror of https://github.com/ceph/ceph
170 lines
4.4 KiB
Groff
170 lines
4.4 KiB
Groff
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.TH "CEPH-OSD" "8" "January 12, 2014" "dev" "Ceph"
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.SH NAME
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ceph-osd \- ceph object storage daemon
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.SH SYNOPSIS
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.nf
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\fBceph\-osd\fP \-i \fIosdnum\fP [ \-\-osd\-data \fIdatapath\fP ] [ \-\-osd\-journal
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\fIjournal\fP ] [ \-\-mkfs ] [ \-\-mkjournal ] [ \-\-mkkey ]
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.fi
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.sp
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.SH DESCRIPTION
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.sp
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\fBceph\-osd\fP is the object storage daemon for the Ceph distributed file
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system. It is responsible for storing objects on a local file system
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and providing access to them over the network.
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.sp
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The datapath argument should be a directory on a btrfs file system
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where the object data resides. The journal is optional, and is only
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useful performance\-wise when it resides on a different disk than
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datapath with low latency (ideally, an NVRAM device).
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.SH OPTIONS
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.INDENT 0.0
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.TP
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.B \-f, \-\-foreground
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Foreground: do not daemonize after startup (run in foreground). Do
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not generate a pid file. Useful when run via \fBceph\-run\fP(8).
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-d
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Debug mode: like \fB\-f\fP, but also send all log output to stderr.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-osd\-data osddata
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Use object store at \fIosddata\fP\&.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-osd\-journal journal
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Journal updates to \fIjournal\fP\&.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-mkfs
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Create an empty object repository. This also initializes the journal
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(if one is defined).
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-mkkey
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Generate a new secret key. This is normally used in combination
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with \fB\-\-mkfs\fP as it is more convenient than generating a key by
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hand with \fBceph\-authtool\fP(8).
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-mkjournal
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Create a new journal file to match an existing object repository.
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This is useful if the journal device or file is wiped out due to a
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disk or file system failure.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-flush\-journal
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Flush the journal to permanent store. This runs in the foreground
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so you know when it\(aqs completed. This can be useful if you want to
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resize the journal or need to otherwise destroy it: this guarantees
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you won\(aqt lose data.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-get\-cluster\-fsid
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Print the cluster fsid (uuid) and exit.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-get\-osd\-fsid
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Print the OSD\(aqs fsid and exit. The OSD\(aqs uuid is generated at
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\-\-mkfs time and is thus unique to a particular instantiation of
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this OSD.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-get\-journal\-fsid
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Print the journal\(aqs uuid. The journal fsid is set to match the OSD
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fsid at \-\-mkfs time.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-c ceph.conf, \-\-conf=ceph.conf
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Use \fIceph.conf\fP configuration file instead of the default
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\fB/etc/ceph/ceph.conf\fP for runtime configuration options.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-m monaddress[:port]
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Connect to specified monitor (instead of looking through
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\fBceph.conf\fP).
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.UNINDENT
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.SH AVAILABILITY
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.sp
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\fBceph\-osd\fP is part of the Ceph distributed storage system. Please refer to
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the Ceph documentation at \fI\%http://ceph.com/docs\fP for more information.
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.SH SEE ALSO
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.sp
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\fBceph\fP(8),
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\fBceph\-mds\fP(8),
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\fBceph\-mon\fP(8),
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\fBceph\-authtool\fP(8)
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.SH COPYRIGHT
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2010-2014, Inktank Storage, Inc. and contributors. Licensed under Creative Commons BY-SA
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.\" Generated by docutils manpage writer.
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