.PP
.SS Device Operations
.TP
-.BI conf_param " <device> <parameter>"
+.BI list_param " [-F|-R] <param_path ...>"
+List the Lustre or LNet parameter name
+.br
+.B -F
+Add '/', '@' or '=' for dirs, symlinks and writeable files, respectively.
+.br
+.B -R
+Recursively list all parameters under the specified path. If
+.I param_path
+is unspecified, all the parameters will be shown.
+.br
+.B Examples:
+.br
+.B
+# lctl list_param ost.*
+.br
+ ost.OSS
+.br
+ ost.num_refs
+.br
+.B
+# lctl list_param -F ost.* debug
+.br
+ ost.OSS/
+.br
+ ost.num_refs
+.br
+ debug=
+.br
+.B
+# lctl list_param -R mdt
+.br
+ mdt
+.br
+ mdt.lustre-MDT0000
+.br
+ mdt.lustre-MDT0000.capa
+.br
+ mdt.lustre-MDT0000.capa_count
+.br
+ mdt.lustre-MDT0000.capa_key_timeout
+.br
+ mdt.lustre-MDT0000.capa_timeout
+.br
+ mdt.lustre-MDT0000.commit_on_sharing
+.br
+ mdt.lustre-MDT0000.evict_client
+.br
+ ...
+.TP
+.BI get_param " [-n|-N|-F] <param_path ...>"
+Get the value of Lustre or LNET parameter from the specified path.
+.br
+.B -n
+Print only the value and not parameter name.
+.br
+.B -N
+Print only matched parameter names and not the values. (Especially useful when using patterns.)
+.br
+.B -F
+When -N specified, add '/', '@' or '=' for directories, symlinks and writeable files, respectively.
+.br
+.B Examples:
+.br
+.B
+# lctl get_param ost.*
+.br
+ ost.OSS
+.br
+ ost.num_refs
+.br
+.B
+# lctl get_param -n debug timeout
+.br
+ super warning dlmtrace error emerg ha rpctrace vfstrace config console
+.br
+ 20
+.br
+.B
+# lctl get_param -N ost.* debug
+.br
+ ost.OSS
+.br
+ ost.num_refs
+.br
+ debug
+.br
+lctl "get_param -NF" is equivalent to "list_param -F".
+.TP
+.BI set_param " [-n] <param_path=value ...>"
+Set the value of Lustre or LNET parameter from the specified path.
+.br
+.B -n
+Disable printing of the key name when printing values.
+.br
+.B Examples:
+.br
+.B
+# lctl set_param fail_loc=0 timeout=20
+.br
+ fail_loc=0
+.br
+ timeout=20
+.br
+.B
+# lctl set_param -n fail_loc=0 timeout=20
+.br
+ 0
+.br
+ 20
+.TP
+.BI conf_param " [-d] <device|fsname>.<parameter>=<value>"
Set a permanent configuration parameter for any device via the MGS. This
-command must be run on the MGS node.
+command must be run on the MGS node.
+.br
+.B -d <device|fsname>.<parameter>
+Delete a parameter setting (use the default value at the next restart). A null value for <value> also deletes the parameter setting.
+.br
+.B Parameters:
+.br
+All of the writable parameters under
+.B lctl list_param
+(e.g.
+.I lctl list_param -F osc.*.* | grep =
+) can be permanently set using
+.B lctl conf_param
+, but the format is slightly different. For conf_param, the device is specified first, then the obdtype. (See examples below.) Wildcards are not supported.
+.br
+Additionally, failover nodes may be added (or removed), and some system-wide parameters may be set as well (sys.at_max, sys.at_min, sys.at_extra, sys.at_early_margin, sys.at_history, sys.timeout, sys.ldlm_timeout.) <device> is ignored for system wide parameters.
+.br
+.B Examples:
+.br
+# lctl conf_param testfs.sys.at_max=1200
+.br
+# lctl conf_param testfs.llite.max_read_ahead_mb=16
+.br
+# lctl conf_param testfs-MDT0000.lov.stripesize=2M
+.br
+# lctl conf_param lustre-OST0001.osc.active=0
+.br
+# lctl conf_param testfs-OST0000.osc.max_dirty_mb=29.15
+.br
+# lctl conf_param testfs-OST0000.ost.client_cache_seconds=15
+.br
+# lctl conf_param testfs-OST0000.failover.node=1.2.3.4@tcp1
.TP
.BI activate
-Reactivate an import after deactivating, below.
+Reactivate an import after deactivating, below. This setting is only effective until the next restart (see
+.B conf_param
+).
.TP
.BI deactivate
Deactivate an import, in particular meaning do not assign new file stripes
.BI blockdev_info " <device node>"
Acquire which lustre file was attached to the device node.
.PP
+.SS Changelogs
+.TP
+.BI changelog_register
+Register a new changelog user for a particular device. Changelog entries
+will not be purged beyond any registered users' set point. (See lfs changelog_clear.)
+.TP
+.BI changelog_deregister " <id>"
+Unregister an existing changelog user. If the user's "clear" record number
+is the minimum for the device, changelog records will be purged until the
+next minimum.
+.PP
.SS Debug
.TP
.BI debug_daemon
.TP
.B --ignore_errors | ignore_errors
Ignore errors during script processing
-.TP
+
.SH EXAMPLES
# lctl
.br
Debug log: 87 lines, 87 kept, 0 dropped.
.br
lctl > quit
-.PP
-# lctl conf_param testfs-MDT0000 sys.timeout=40
.SH BUGS
-Please report all bugs to ClusterFileSystems, support@clusterfs.com
+Please report all bugs to Sun Microsystems, Inc. http://bugzilla.lustre.org/
.SH AVAILABILITY
.B lctl
is part of the
.BR Lustre (7)
-filesystem package and is available from CFS
+filesystem package and is available from Sun Microsystems, Inc.
.br
-http://clusterfs.com
+http://www.sun.com/software/products/lustre/index.xml
.SH SEE ALSO
.BR Lustre (7),
.BR mkfs.lustre (8),
git://git.whamcloud.com / fs / lustre-release.git / blobdiff