.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.
+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.
+.B lfsck_start \fR<-M | --device [MDT,OST]_device>
+ \fR[-A | --all] [-c | --create_ostobj [on | off]]
+ \fR[-e | --error <continue | abort>] [-h | --help]
+ \fR[-n | --dryrun [on | off]] [-o | --orphan]
+ \fR[-r | --reset] [-s | --speed speed_limit]
+ \fR[-t | --type lfsck_type[,lfsck_type...]]
+ \fR[-w | --window_size size]
+.br
+Start LFSCK on the specified MDT or OST device with specified parameters.
+.TP
+ -M, --device <MDT,OST_device>
+The MDT or OST device to start LFSCK/scrub on.
+.TP
+ -A, --all
+Start LFSCK on all available MDT devices.
.TP
- -M, --device <MDT_device>
-The MDT device to check.
+ -c, --create_ostobj [on | off]
+Create the lost OST-object for dangling LOV EA: 'off' (default) or 'on'. Under
+default mode, when the LFSCK find some MDT-object with dangling reference, it
+will report the inconsistency but will not repair it. If 'on' is given, then
+LFSCK will re-create the missed OST-object.
.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.
+With error_handle as 'abort' then if a repair is impossible LFSCK will save
+the current position stop with an error. Otherwise the default behavior is
+to 'continue' if a repair is impossible.
.TP
-h, --help
-Show this help.
+Show the usage message.
+.TP
+ -n, --dryrun [on | off]
+Perform a trial run with no changes made, if 'on' or no argument is given.
+Default is 'off', meaning that any inconsistencies found will be repaired.
.TP
- -n, --dryrun <on|off>
-Perform a trial run with no changes made.
+ -o, --orphan
+Handle orphan objects, such as orphan OST-objects for layout LFSCK by
+linking them under the .../.lustre/lost+found directory.
.TP
-r, --reset
-Set the current position of LFSCK progress to the beginning of the specified
-MDT.
+Set the current position of object iteration to the beginning of the specified
+device. The non-specified parameters will also be reset to the default. By
+default the iterator will resume the scanning from the last saved checkpoint
+position, and other unspecified parameters will be the same as the prior
+incomplete run.
.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.
+Set the upper limit of LFSCK processing in objects per second to reduce load
+on the servers and storage. If no value is specified the saved value is used
+(if resuming from a checkpoint). Otherwise the default value of 0 is used,
+which means check the filesystem as quickly 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).
+The type of LFSCK checking/repair to execute. If no type is given and the
+previous run was incomplete or internal consistency checks detected an error,
+then the same types are used for the next run. Otherwise, the default is to
+check all types of consistency. Any time LFSCK is triggered on an ldiskfs
+MDT or OST then OI Scrub is run. Valid types are a comma-separated list of one or more of
+.B scrub
+to run only the local OI Scrub on ldiskfs targets,
+.B namespace
+for FID-in-dirent and linkEA checking on the MDT(s),
+.B layout
+for MDT-OST cross-reference consistency, and
+.B all
+to run all of the available check types.
+.TP
+ -w, --window_size <size>
+Specifies the maximum number of in-flight request being processed at
+one time. This controls the load placed on remote OSTs when running
+.B layout
+checks. By default there are at most 1024 outstanding requests.
.TP
-.B lfsck_stop \fR<-M | --device MDT_device> [-h | --help]
-Stop LFSCK on the specified MDT device.
+.B lfsck_stop \fR<-M | --device [MDT,OST]_device> [-A | --all] [-h | --help]
+Stop LFSCK on the specified MDT or OST device.
.TP
- -M, --device <MDT_device>
-The MDT device.
+ -M, --device <[MDT,OST]_device>
+The MDT or OST device to stop LFSCK/scrub on.
+.TP
+ -A, --all
+Stop LFSCK on all devices.
.TP
-h, --help
Show this help.
.TP
.B --ignore_errors | ignore_errors
Ignore errors during script processing
+.TP
+.B lustre_build_version
+Output the build version of the Lustre kernel modules
+.TP
+.B --version
+Output the build version of the lctl utility
+.TP
+.B help
+Provides brief help on the various arguments
+.TP
+.B exit/quit
+Quit the interactive lctl session
.SH EXAMPLES
# lctl
git://git.whamcloud.com / fs / lustre-release.git / blobdiff