From a list of nids for a remote node, show which interface communication
will take place on.
.TP
+.BI replace_nids " <devicename> <nid1>[,nid2,nid3 ...]"
+Replace the LNET Network Identifiers for a given device,
+as when the server's IP address has changed.
+This command must be run on the MGS node.
+Only MGS server should be started (command execution returns error
+in another cases). To start the MGS service only:
+mount -t lustre <MDT partition> -o nosvc <mount point>
+Note the replace_nids command skips any invalidated records in the configuration log.
+The previous log is backed up with the suffix '.bak'.
+.TP
.BI ping " <nid> "
Check LNET connectivity via an LNET ping. This will use the fabric
appropriate to the specified NID.
.PP
.SS Device Operations
.TP
+.BI list_param " [-F|-R] <param_search ...>"
+List the Lustre or LNet parameter name
+.B -F
+Add '/', '@' or '=' for dirs, symlinks and writeable files, respectively.
+.br
+.B -R
+Recursively list all parameters under the specified parameter search string. If
+.I param_search
+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] <parameter ...>"
+Get the value of Lustre or LNET parameter.
+.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] [-P] [-d] <parameter=value ...>"
+Set the value of Lustre or LNET parameter.
+.br
+.B -n
+Disable printing of the key name when printing values.
+.br
+.B -P
+Set the parameter permanently, filesystem-wide.
+This parameters are only visible to 2.5.0 and later clients, older clients will not see these parameters.
+.br
+.B -d
+Remove the permanent setting (only with -P option)
+.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
+.br
+.B
+# lctl set_param -P osc.*.max_dirty_mb=32
+.br
+.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.
is the minimum for the device, changelog records will be purged until the
next minimum.
.PP
+.SS LFSCK
+An on-line Lustre consistency check and repair tool.
+.TP
+.B lfsck_start \fR<-M | --device MDT_device>
+ \fR[-e | --error <error_handle>]
+ \fR[-h | --help]
+ \fR[-n | --dryrun <switch>]
+ \fR[-r | --reset]
+ \fR[-s | --speed <speed_limit>]
+ \fR[-t | --type <lfsck_type[,lfsck_type...]>]
+.br
+Start LFSCK on the specified MDT device with specified parameters.
+.TP
+ -M, --device <MDT_device>
+The MDT device to check.
+.TP
+ -e, --error <error_handle>
+With error_handle as 'abort' LFSCK will stop if a repair is impossible. If no
+value is specified, the saved value will be used if resuming from a checkpoint.
+Otherwise the default behavior is to 'continue' if a rapair is impossible.
+.TP
+ -h, --help
+Show this help.
+.TP
+ -n, --dryrun <on|off>
+Perform a trial run with no changes made.
+.TP
+ -r, --reset
+Set the current position of LFSCK progress to the beginning of the specified
+MDT.
+.TP
+ -s, --speed <speed_limit>
+Set the upper limit of LFSCK processing in objects per second. If no value is
+specified the saved value is used (if resuming from a check point). Otherwise
+the default value of 0 is used. 0 means run as fast as possible.
+.TP
+ -t, --type <lfsck_type[,lfsck_type...]>
+Specify the type of LFSCK to execute. By default, OI Scrub is executed.
+Alternative types include FID-in-dirent and linkEA (namespace).
+.TP
+.B lfsck_stop \fR<-M | --device MDT_device> [-h | --help]
+Stop LFSCK on the specified MDT device.
+.TP
+ -M, --device <MDT_device>
+The MDT device.
+.TP
+ -h, --help
+Show this help.
.SS Debug
.TP
.BI debug_daemon
.br
lctl > quit
-.SH BUGS
-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 Sun Microsystems, Inc.
-.br
-http://www.sun.com/software/products/lustre/index.xml
+filesystem package.
.SH SEE ALSO
.BR Lustre (7),
.BR mkfs.lustre (8),