CEPH-OSD(8) Ceph CEPH-OSD(8)NAME
ceph-osd - ceph object storage daemon
SYNOPSIS
ceph-osd -i osdnum [ --osd-data datapath ] [ --osd-journal
journal ] [ --mkfs ] [ --mkjournal ] [ --mkkey ]
DESCRIPTION
ceph-osd 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.
The datapath argument should be a directory on a btrfs file system
where the object data resides. The journal is optional, and is only
useful performance-wise when it resides on a different disk than data‐
path with low latency (ideally, an NVRAM device).
OPTIONS-f, --foreground
Foreground: do not daemonize after startup (run in foreground).
Do not generate a pid file. Useful when run via ceph-run(8).
-d Debug mode: like -f, but also send all log output to stderr.
--osd-data osddata
Use object store at osddata.
--osd-journal journal
Journal updates to journal.
--mkfs Create an empty object repository. Normally invoked by
mkcephfs(8). This also initializes the journal (if one is
defined).
--mkkey
Generate a new secret key. This is normally used in combination
with --mkfs as it is more convenient than generating a key by
hand with ceph-authtool(8).
--mkjournal
Create a new journal file to match an existing object reposi‐
tory. This is useful if the journal device or file is wiped out
due to a disk or file system failure.
--flush-journal
Flush the journal to permanent store. This runs in the fore‐
ground so you know when it's completed. This can be useful if
you want to resize the journal or need to otherwise destroy it:
this guarantees you won't lose data.
-c ceph.conf, --conf=ceph.conf
Use ceph.conf configuration file instead of the default
/etc/ceph/ceph.conf for runtime configuration options.
-m monaddress[:port]
Connect to specified monitor (instead of looking through
ceph.conf).
AVAILABILITY
ceph-osd is part of the Ceph distributed file system. Please refer to
the Ceph wiki at http://ceph.newdream.net/wiki for more information.
SEE ALSOceph(8), ceph-mds(8), ceph-mon(8), ceph-authtool(8)COPYRIGHT
2011, New Dream Network
dev September 22, 2011 CEPH-OSD(8)