-.TH lfs 1 "2009 Jan 29" Lustre "user utilities"
+.TH lfs 1 "2017 Jan 12" Lustre "user utilities"
.SH NAME
-lfs \- Lustre utility to create a file with specific striping pattern, find the striping pattern of exiting files
+lfs \- Lustre utility to create a file with specific striping pattern, find the striping pattern of existing files, do certain quota operations, and manage distributed namespace options for directories
.SH SYNOPSIS
.br
.B lfs
.br
.B lfs check <mds|osts|servers>
.br
-.B lfs df [-i] [-h] [--pool|-p <fsname>[.<pool>] [path]
+.B lfs data_version [-n] \fB<filename>\fR
.br
-.B lfs find [[!] --atime|-A [-+]N] [[!] --mtime|-M [-+]N]
- \fB[[!] --ctime|-C [-+]N] [--maxdepth|-D N] [--name|-n pattern]
- \fB[--print|-p] \fB[--print0|-P] [--obd|-O <uuid[s]>]
- \fB[[!] --size|-S [-+]N[kMGTPE]] [--type |-t {bcdflpsD}]
- \fB[[!] --gid|-g|--group|-G <gname>|<gid>]
- \fB[[!] --uid|-u|--user|-U <uname>|<uid>]
- \fB<dirname|filename>\fR
+.B lfs df [-ihlv] [--pool|-p <fsname>[.<pool>]] [path]
.br
-.B lfs osts
+.B lfs fid2path [--link <linkno>] <fsname|rootpath> <fid> ...
.br
-.B lfs getstripe [--obd|-O <uuid>] [--quiet|-q] [--verbose|-v]
- \fB[--recursive|-r] <dirname|filename>\fR
+.B lfs find <directory|filename>
+ \fB[[!] --atime|-A [-+]N] [[!] --mtime|-M [-+]N] [[!] --ctime|-C [+-]N]
+ \fB[--maxdepth|-D N] [[!] --mdt|-m <uuid|index,...>] [--name|-n pattern]
+ \fB[[!] --ost|-O <uuid|index,...>] [--print|-p] [--print0|-P]
+ \fB[[!] --size|-s [-+]N[kMGTPE]]
+ \fB[[!] --stripe-count|-c [+-]<stripes>]
+ \fB[[!] --stripe-index|-i <index,...>]
+ \fB[[!] --stripe-size|-S [+-]N[kMG]]
+ \fB[[!] --layout|-L raid0,released]
+ \fB[[!] --component-count [+-]comp_cnt]
+ \fB[[!] --component-start [+-]N[kMGTPE]]
+ \fB[[!] --component-end|-E [+-]N[kMGTPE]]
+ \fB[[!] --component-flags <comp_flags>]
+ \fB[--type |-t {bcdflpsD}] [[!] --gid|-g|--group|-G <gname>|<gid>]
+ \fB[[!] --uid|-u|--user|-U|--projid <uname>|<uid>|<projid>] [[!] --pool <pool>]\fR
.br
-.B lfs setstripe [--size|-s stripe-size] [--count|-c stripe-cnt]
- \fB[--offset|-o start-ost] [--pool|-p <pool>]
- \fB<dir|filename>\fR
+.B lfs getname [-h]|[path ...]
.br
-.B lfs setstripe -d <dir>
+.B lfs getstripe [\fB--obd\fR|\fB-O\fR <\fIuuid\fR>] [\fB--quiet\fR|\fB-q\fR]
+ [\fB--verbose\fR|\fB-v\fR] [\fB--stripe-count\fR|\fB-c\fR]
+ [\fB--stripe-index\fR|\fB-i\fR] [\fB--mdt-index\fR|\fB-M\fR]
+ [\fB--fid\fR|\fB-F\fR] [\fB--stripe-size\fR|\fB-S\fR]
+ [\fB--directory\fR|\fB-d\fR] [\fB--layout\fR|\fB-L\fR]
+ [\fB--generation\fR|\fB-g\fR]
+ [\fB--component-id\fR[=\fIcomp_id\fR]|\fB-I\fR[\fIcomp_id\fR]]
+ [\fB--component-flags\fR[=\fIcomp_flags\fR]] [\fB--component-count\fR]
+ [\fB--component-start\fR[=[+-]\fIN\fR[kMGTPE]]]
+ [\fB--component-end\fR[=[+-]\fIN\fR[kMGTPE]]|\fB-E\fR[[+-]\fIN\fR[kMGTPE]]]
+ [\fB--pool\fR|\fB-p\fR] [\fB--recursive\fR|\fB-r\fR] [\fB--raw\fR|\fB-R\fR]
+ <\fIdirname\fR|\fIfilename\fR> ...
.br
-.B lfs poollist <filesystem>[.<pool>] | <pathname>
+.B lfs migrate \fB-m <mdt_index>\fR
+.IR directory
.br
-.B lfs quota [-v] [-o obd_uuid|-I ost_idx|-i mdt_idx] [-u <uname>| -u <uid>|-g <gname>| -g <gid>] <filesystem>
+.B lfs migrate [\fB-c | --stripe-count <stripe_count>\fR]
+ [\fB-i | --stripe-index <start_ost_idx>\fR]
+ [\fB-S | --stripe-size <stripe_size>\fR]
+ [\fB-p | --pool <pool_name>\fR]
+ [\fB-o | --ost-list <ost_indices>\fR]
+ [\fB-b | --block\fR]
+ [\fB-n | --non-block\fR]
+.IR file|directory
.br
-.B lfs quota -t <-u|-g> <filesystem>
+.B lfs migrate <\fB-E | --component-end comp_end1\fR> [\fBSTRIPE_OPTIONS\fR]
+ <\fB-E | --component-end comp_end2\fR> [\fBSTRIPE_OPTIONS\fR]
+ \fB...\fR
+.IR filename
.br
-.B lfs quotacheck [-ug] <filesystem>
+.B lfs mkdir [\fB-c | --count <stripe_count>\fR]
+ [\fB-i | --index <mdt_idx>\fR]
+ [\fB-h | --hash-type <hash_name>\fR]
+ [\fB-m | --mode <mode>\fR]
+ [\fB-D | --default\fR]
+.IR directory
+.br
+.B lfs osts
+.RB [ path ]
+.br
+.B lfs mdts
+.RB [ path ]
+.br
+.B lfs path2fid [--parents] <path> ...
+.br
+.B lfs pool_list <filesystem>[.<pool>] | <pathname>
.br
-.B lfs quotachown [-i] <filesystem>
+.B lfs quota [-q] [-v] [-o obd_uuid|-I ost_idx|-i mdt_idx] [-u <uname>| -u <uid>|-g <gname>| -g <gid>] [-p <projid>] <filesystem>
+.br
+.B lfs quota -t <-u|-g|-p> <filesystem>
+.br
+.B lfs quotacheck [-ug] <filesystem>
.br
.B lfs quotaon [-ugf] <filesystem>
.br
.B lfs quotaoff [-ug] <filesystem>
.br
-.B lfs quotainv [-ug] [-f] <filesystem>
-.br
-.B lfs setquota <-u|--user|-g|--group> <uname|uid|gname|gid>
+.B lfs setquota <-u|--user|-g|--group|-p|--projid> <uname|uid|gname|gid|projid>
\fB[--block-softlimit <block-softlimit>]
\fB[--block-hardlimit <block-hardlimit>]
\fB[--inode-softlimit <inode-softlimit>]
\fB[--inode-hardlimit <inode-hardlimit>]
\fB<filesystem>\fR
.br
-.B lfs setquota <-u|--user|-g|--group> <uname|uid|gname|gid>
+.B lfs setquota <-u|--user|-g|--group|-p|--projid> <uname|uid|gname|gid|projid>
\fB[-b <block-softlimit>] [-B <block-hardlimit>]
\fB[-i <inode-softlimit>] [-I <inode-hardlimit>]
\fB<filesystem>\fR
.br
-.B lfs setquota -t <-u|-g>
- \fB[--block-grace <block-grace>]
- \fB[--inode-grace <inode-grace>]
+.B lfs setquota -t <-u|-g|-p>
+ \fB[--block-grace <block-grace>]\fR
+ \fB[--inode-grace <inode-grace>]\fR
\fB<filesystem>\fR
.br
-.B lfs setquota -t <-u|-g>
- \fB[-b <block-grace>] [-i <inode-grace>]
+.B lfs setquota -t <-u|-g|-p>
+ \fB[-b <block-grace>] [-i <inode-grace>]\fR
\fB<filesystem>\fR
.br
+.B lfs setstripe [--stripe-size|-S stripe_size] [--stripe-count|-c stripe_count]
+ \fB[--stripe-index|-i start_ost_index] [--pool|-p <poolname>]
+ \fB[--ost-list|-o <ost_indices>] <directory|filename>\fR
+.br
+.B lfs setstripe -d <dir>
+.br
+.B lfs setstripe <--component-end|-E end1> [STRIPE_OPTIONS]
+ \fB<--component-end|-E end2> [STRIPE_OPTIONS] ... <filename>\fR
+.br
+.B lfs setstripe --component-add <--component-end|-E end1> [STRIPE_OPTIONS]
+ \fB<--component-end|-E end2> [STRIPE_OPTIONS] ... <filename>\fR
+.br
+.B lfs setstripe --component-del <--component-id|-I id | --component-flags flags> <filename>
+.br
+.B lfs --version
+.br
+.B lfs --list-commands
+.br
.B lfs help
.SH DESCRIPTION
.B lfs
-can be used to create a new file with a specific striping pattern, determine the default striping pattern, gather the extended attributes (object numbers and location) for a specific file. It can be invoked interactively without any arguments or in a non-interactive mode with one of the arguements supported.
+can be used to create a new file with a specific striping pattern, determine
+the default striping pattern, gather the extended attributes (object numbers
+and location) for a specific file. It can be invoked interactively without any
+arguments or in a non-interactive mode with one of the arguments supported.
.SH OPTIONS
-The various options supported by lctl are listed and explained below:
+The various options supported by lfs are listed and explained below:
.TP
.B changelog
Show the metadata changes on an MDT. Start and end points are optional. The --follow option will block on new changes; this option is only valid when run direclty on the MDT node.
free up disk space. An <endrec> of 0 indicates the current last record.
Changelog consumers must be registered on the MDT node using \fBlctl\fR.
.TP
-.B check
+.B check
Display the status of MDS or OSTs (as specified in the command) or all the servers (MDS and OSTs)
.TP
.B df
-Report filesystem disk space usage or inodes usage of each MDT/OST. Can limit
-the scope to a specific OST pool
-.TP
-.B find
-To search the directory tree rooted at the given dir/file name for the files that match the given parameters: \fB--atime\fR (file was last accessed N*24 hours ago), \fB--ctime\fR (file's status was last changed N*24 hours ago), \fB--mtime\fR (file's data was last modified N*24 hours ago), \fB--obd\fR (file has an object on a specific OST or OSTs), \fB--size\fR (file has size in bytes, or \fBk\fRilo-, \fBM\fRega-, \fBG\fRiga-, \fBT\fRera-, \fBP\fReta-, or \fBE\fRxabytes if a suffix is given), \fB--type\fR (file has the type: \fBb\fRlock, \fBc\fRharacter, \fBd\fRirectory, \fBp\fRipe, \fBf\fRile, sym\fBl\fRink, \fBs\fRocket, or \fBD\fRoor (Solaris)), \fB--uid\fR (file has specific numeric user ID), \fB--user\fR (file owned by specific user, numeric user ID allowed), \fB--gid\fR (file has specific group ID), \fB--group\fR (file belongs to specific group, numeric group ID allowed). The option \fB--maxdepth\fR limits find to decend at most N levels of directory tree. The options \fB--print\fR and \fB--print0\fR print full file name, followed by a newline or NUL character correspondingly. Using \fB!\fR before an option negates its meaning (\fIfiles NOT matching the parameter\fR). Using \fB+\fR before a numeric value means \fIfiles with the parameter OR MORE\fR, while \fB-\fR before a numeric value means \fIfiles with the parameter OR LESS\fR.
-.TP
-.B osts
-List all the OSTs for the filesystem
-.TP
-.B getstripe
-To list the striping info for a given filename or files in a directory, optionally recursively, for all files in a directory tree: \fB--quiet\fR (don't print object IDs), \fB--verbose\fR (print striping parameters), \fB--recursive\fR (recurse into subdirectories).
-.TP
-.B setstripe [--size stripe-size] [--count stripe-cnt]
- \fB[--offset start-ost] [--pool <pool>]\fR
-.br
-To create a new file, or set the directory default, with the specified striping parameters. The
-.I stripe-count
-is the number of OSTs to stripe a file over. A
-.I stripe-count
-of 0 means to use the filesystem-wide default stripe count (default 1), and a
-.I stripe-count
-of -1 means to stripe over all available OSTs. The
-.I stripe-size
-is the number of bytes to store on each OST before moving to the next OST. A
-.I stripe-size
-of 0 means to use the filesystem-wide default stripe size (default 1MB). The
-.I start-ost
-is the OST index (base 10, starting at 0) on which to start striping for this file. A
-.I start-ost
-of -1 allows the MDS to choose the starting index and it is strongly recommended, as this allows space and load balancing to be done by the MDS as needed. The
-.I pool
-is the name of a predefined pool of OSTs (see
-.I lctl
-) that will be used for striping. The
-.I stripe-count, stripe-size, start-ost
-will be used as well; the
-.I start-ost
-must be part of the pool or an error will be returned.
-.TP
-.B setstripe -d
-Delete the default striping on the specified directory.
-.TP
-.B poollist <filesystem>[.<pool>] | <pathname>
-List the pools in \fBfilesystem\fR or \fBpathname\fR, or the OSTs in \fBfilesystem.pool\fR
-.TP
-.B quota [-v] [-o obd_uuid|-i mdt_idx|-I ost_idx] [-u|-g <uname>|<uid>|<gname>|<gid>] <filesystem>
-To display disk usage and limits, either for the full filesystem, or for objects on a specific obd. A user or group name or an ID can be specified. If both user and group are omitted quotas for current uid/gid are shown. -v provides more verbose (with per-obd statistics) output.
-.TP
-.B quota -t <-u|-g> <filesystem>
-To display block and inode grace times for user (-u) or group (-g) quotas
-.TP
-.B quotachown
-To change files' owner and group on OSTs of the specified filesystem
-.TP
-.B quotacheck [-ugf] <filesystem>
-To scan the specified filesystem for disk usage, and create or update quota files. Options specify quota for users (-u) groups (-g) and force (-f)
-.TP
-.B quotaon [-ugf] <filesystem>
-To turn filesystem quotas on. Options specify quota for users (-u) groups (-g) and force (-f)
-.TP
-.B quotaoff [-ugf] <filesystem>
-To turn filesystem quotas off. Options specify quota for users (-u) groups (-g) and force (-f)
-.TP
-.B quotainv [-ug] [-f] <filesystem>
-Clear quota files (administrative quota files if used without -f, operational quota files otherwise), all of their quota entries, for (-u) users or (-g) groups; after quotainv one must use quotacheck before using quotas. DO NOT USE THIS COMMAND UNLESS YOU REALLY KNOW WHAT IT DOES. IT IS MAINLY FOR INTERNAL PURPOSES.
-.TP
-.B setquota <-u|-g> <uname>|<uid>|<gname>|<gid> [--block-softlimit <block-softlimit>] [--block-hardlimit <block-hardlimit>] [--inode-softlimit <inode-softlimit>] [--inode-hardlimit <inode-hardlimit>] <filesystem>
-To set filesystem quotas for users or groups. Limits can be specified with -b, -k, -m, -g, -t, -p suffixes which specify units of 1, 2^10, 2^20, 2^30, 2^40 and 2^50 accordingly. Block limits unit is kilobyte (1024) by default and block limits are always kilobyte-grained (even if specified in bytes), see EXAMPLES
-.TP
-.B setquota -t [-u|-g] [--block-grace <block-grace>] [--inode-grace <inode-grace>] <filesystem>
-To set filesystem quota grace times for users or groups. Grace time is specified in "XXwXXdXXhXXmXXs" format or as an integer seconds value, see EXAMPLES
-.TP
-.B help
+See
+.BR lfs-df (1)
+for details of
+.B lfs df
+usage.
+.TP
+.B find
+To search the directory tree rooted at the given dir/file name for the files that match the given parameters: \fB--atime\fR (file was last accessed N*24 hours ago), \fB--ctime\fR (file's status was last changed N*24 hours ago), \fB--mtime\fR (file's data was last modified N*24 hours ago), \fB--obd\fR (file has an object on a specific OST or OSTs), \fB--size\fR (file has size in bytes, or \fBk\fRilo-, \fBM\fRega-, \fBG\fRiga-, \fBT\fRera-, \fBP\fReta-, or \fBE\fRxabytes if a suffix is given), \fB--type\fR (file has the type: \fBb\fRlock, \fBc\fRharacter, \fBd\fRirectory, \fBp\fRipe, \fBf\fRile, sym\fBl\fRink, \fBs\fRocket, or \fBD\fRoor (Solaris)), \fB--uid\fR (file has specific numeric user ID), \fB--user\fR (file owned by specific user, numeric user ID allowed), \fB--gid\fR (file has specific group ID), \fB--group\fR (file belongs to specific group, numeric group ID allowed),\fB--projid\fR (file has specific numeric project ID), \fB--layout\fR (file has a raid0 layout or is released). The option \fB--maxdepth\fR limits find to decend at most N levels of directory tree. The options \fB--print\fR and \fB--print0\fR print full file name, followed by a newline or NUL character correspondingly. Using \fB!\fR before an option negates its meaning (\fIfiles NOT matching the parameter\fR). Using \fB+\fR before a numeric value means 'more than n', while \fB-\fR before a numeric value means 'less than n'.
+.TP
+.B getname [-h]|[path ...]
+Report all the Lustre mount points and the corresponding Lustre filesystem
+instance. If one or more \fBpath\fR entries are provided, then only the
+Lustre instance for these mount points is returned. If the path given is not on
+a Lustre instance 'No such device' is reported.
+.TP
+.B osts
+.RB [ path ]
+List all the OSTs for all mounted filesystems. If a \fBpath\fR is provided
+that is located on a lustre mounted file system then only the OSTs belonging
+to that filesystem are displayed.
+.TP
+.B getstripe [\fB--obd\fR|\fB-O\fR <\fIuuid\fR>] [\fB--quiet\fR|\fB-q\fR]
+ [\fB--verbose\fR|\fB-v\fR] [\fB--stripe-count\fR|\fB-c\fR]
+ [\fB--stripe-index\fR|\fB-i\fR] [\fB--mdt-index\fR|\fB-M\fR]
+ [\fB--fid\fR|\fB-F\fR] [\fB--stripe-size\fR|\fB-S\fR]
+ [\fB--directory\fR|\fB-d\fR] [\fB--layout\fR|\fB-L\fR]
+ [\fB--generation\fR|\fB-g\fR]
+ [\fB--component-id\fR[=\fIcomp_id\fR]|\fB-I\fR[\fIcomp_id\fR]]
+ [\fB--component-flags\fR[=\fIcomp_flags\fR]] [\fB--component-count\fR]
+ [\fB--component-start\fR[=[+-]\fIN\fR[kMGTPE]]]
+ [\fB--component-end\fR[=[+-]\fIN\fR[kMGTPE]]|\fB-E\fR[[+-]\fIN\fR[kMGTPE]]]
+ [\fB--pool\fR|\fB-p\fR] [\fB--recursive\fR|\fB-r\fR] [\fB--raw\fR|\fB-R\fR]
+ <\fIdirname\fR|\fIfilename\fR> ...
+.br
+List the striping information for a given filename or directory tree.
+By default the stripe count, size, and offset will be returned. If you
+only want specific striping information then the options of
+.BR --count ,
+.BR --size ,
+.BR --index ,
+.BR --offset ,
+.BR --layout ,
+.BR --fid ,
+.BR --generation ,
+.BR --component-id ,
+.BR --component-flags ,
+.BR --component-count ,
+.BR --component-start ,
+.BR --component-end ,
+or
+.B --pool
+can be used to return only the specific fields.
+.br
+If the
+.B --raw
+option is specified, the stripe information is printed without substituting the
+filesystem's default values for unspecified fields. If the striping EA is not
+set, 0, 0, and -1 will be printed for the stripe count, size, and offset
+respectively.
+In the case where you only want details about the files' object id
+information then the
+.B --quiet
+option is used. Additional information available about striping can be
+displayed with
+.BR --verbose .
+The default behavior when a directory is specified is to list the striping
+information for all files within the specified directory (like
+.RB ' "ls -l" ') .
+This can be expanded with
+.B --recursive
+which will recurse into all subdirectories.
+If you wish to get striping information for only the specified directory, then
+.B --directory
+can be used to limit the information, like
+.RB ' "ls -d" ').
+You can limit the returned files to those with objects on a specific OST with
+.BR --obd .
+To show only the FID use
+.BR --fid .
+The layout generation can be printed with the
+.B --generation
+option.
+You can limit the displayed content by specifing argument for
+.B --component-id|-I
+.B --component-flags
+.B --component-start
+.B --component-end|-E
+options. For example, "--component-id=2" or "-I2" will only display the layout
+attributes for the component with id equal to 2.
+.TP
+.B fid2path [--link <linkno>] <fsname|rootpath> <fid> ...
+Print out the pathname(s) for the specified \fIfid\fR(s) from the filesystem
+mounted at \fBrootpath\fR or named \fBfsname\fR. If a file has multiple
+hard links, then all of the pathnames for that file are printed, unless
+\fB--link\fR limits the printing to only the specified link number (starting
+at 0, in no particular order). If multiple fids are specified, but only a
+single pathname is needed for each file, use \fB--link 0\fR.
+.TP
+.B path2fid [--parents] <path> ...
+Print out the FIDs for the specified \fBpath(s)\fR. If multiple pathnames
+are given, then they will be printed one per line with the path as prefix.
+The \fB--parents\fR switch makes it output the parent FID and name(s) of the
+given entries. If an entry has multiple links, these are displayed on a single
+line, tab-separated.
+.TP
+.B pool_list
+.RI { filesystem }[ .poolname "] | {" pathname }
+List the pools in
+.I filesystem
+or
+.IR pathname ,
+or the OSTs in
+.IR filesystem.pool .
+.TP
+.B quota [-q] [-v] [-o obd_uuid|-i mdt_idx|-I ost_idx] [-u|-g|-p <uname>|<uid>|<gname>|<gid>|<projid>] <filesystem>
+To display disk usage and limits, either for the full filesystem, or for objects on a specific obd. A user or group name or an ID can be specified. If user group and project are omitted quotas for current uid/gid/projid are shown. -v provides more verbose (with per-obd statistics) output. -q disables printing of additional descriptions (including column titles).
+.TP
+.B quota -t <-u|-g|-p> <filesystem>
+To display block and inode grace times for user (-u) or group (-g) or project (-p) quotas
+.TP
+.B quotacheck [-ugf] <filesystem> (deprecated as of 2.4.0)
+To scan the specified filesystem for disk usage, and create or update quota files. Options specify quota for users (-u) groups (-g) and force (-f). Not useful anymore with servers >= 2.4.0 since space accounting is always turned on.
+.TP
+.B quotaon [-ugf] <filesystem> (deprecated as of 2.4.0)
+To turn filesystem quotas on. Options specify quota for users (-u) groups (-g) and force (-f). Not used anymore in lustre 2.4.0 where quota enforcement must be enabled via conf_param (e.g. lctl conf_param ${FSNAME}.quota.<ost|mdt>=<u|g|ug>)
+.TP
+.B quotaoff [-ugf] <filesystem> (deprecated as of 2.4.0)
+To turn filesystem quotas off. Options specify quota for users (-u) groups (-g) and force (-f). Not used anymore in lustre 2.4.0 where quota enforcement can be turned off (for inode or block) by running the following command on the MGS: lctl conf_param ${FSNAME}.quota.<ost|mdt>=""
+.TP
+.B setquota <-u|-g|-p> <uname>|<uid>|<gname>|<gid>|<projid> [--block-softlimit <block-softlimit>] [--block-hardlimit <block-hardlimit>] [--inode-softlimit <inode-softlimit>] [--inode-hardlimit <inode-hardlimit>] <filesystem>
+To set filesystem quotas for users, groups or project. Limits can be specified with -b, -k, -m, -g, -t, -p suffixes which specify units of 1, 2^10, 2^20, 2^30, 2^40 and 2^50 accordingly. Block limits unit is kilobyte (1024) by default and block limits are always kilobyte-grained (even if specified in bytes), see EXAMPLES
+.TP
+.B setquota -t [-u|-g|-p] [--block-grace <block-grace>] [--inode-grace <inode-grace>] <filesystem>
+To set filesystem quota grace times for users,groups or project. Grace time is specified in "XXwXXdXXhXXmXXs" format or as an integer seconds value, see EXAMPLES
+.TP
+.B swap_layouts <filename1> <filename2>
+Swap the data (layout and OST objects) of two regular files. The
+two files have to be in the same filesystem, owned by the same user,
+reside on the same MDT and writable by the user.
+
+Swapping the layout of two directories is not permitted.
+.TP
+.B data_version [-n] <filename>
+Display current version of file data. If -n is specified, data version is read
+without taking lock. As a consequence, data version could be outdated if there
+is dirty caches on filesystem clients, but this will not force data flushes and
+has less impact on filesystem.
+
+Even without -n, race conditions are possible and data version should be
+checked before and after an operation to be confident the data did not change
+during it.
+.TP
+.B mkdir
+lfs mkdir is documented in the man page: lfs-mkdir(1). NOTE:
+.B lfs setdirstripe
+is an alias of the command
+.B lfs mkdir
+.TP
+.B mv
+lfs mv is deprecated, use lfs
+.B migrate
+instead.
+.TP
+.B migrate
+See lfs-migrate(1).
+.TP
+.B setstripe
+See lfs-setstripe(1).
+.TP
+.B --version
+Output the build version of the lfs utility. Use "lctl lustre_build_version" to get the version of the Lustre kernel modules
+.TP
+.B --list-commands
+Output a list of the commands supported by the lfs utility
+.TP
+.B help
Provides brief help on the various arguments
.TP
-.B exit/quit
+.B exit/quit
Quit the interactive lfs session
.SH EXAMPLES
.TP
-.B $ lfs setstripe -s 128k -c 2 /mnt/lustre/file1
-This creates a file striped on two OSTs with 128kB on each stripe.
-.TP
-.B $ lfs setstripe -d /mnt/lustre/dir
-This deletes a default stripe pattern on dir. New files will use the default striping pattern created therein.
-.TP
.B $ lfs getstripe -v /mnt/lustre/file1
Lists the detailed object allocation of a given file
.TP
+.B $ lfs getstripe -v -I2 /mnt/lustre/file1
+Lists the detailed information of the component 2 in a given file
+.TP
+.B $ lfs getstripe --component-flags=^init -I /mnt/lustre/file1
+Print only the component IDs for all the uninstantiated components
+.TP
+.B $ lfs getstripe -E-64M /mnt/lustre/file1
+Lists the information of the components in a file which has less than 64M extent end
+.TP
+.B $ lfs getstripe -I3 --component-start /mnt/lustre/file1
+Print only the component start for the component with ID of 3
+.TP
.B $ lfs find /mnt/lustre
Efficiently lists all files in a given directory and its subdirectories
.TP
.TP
.B $ lfs find --obd OST2-UUID /mnt/lustre/
Recursively list all files in a given directory that have objects on OST2-UUID.
-.tP
-.B $ lfs check servers
+.TP
+.B $ lfs find --component-count +3 /mnt/lustre
+Recursively list all files that have more than 3 components.
+.TP
+.B $ lfs check servers
Check the status of all servers (MDT, OST)
.TP
.B $ lfs osts
List all the OSTs
.TP
-.B $ lfs df -h
-Lists space usage per OST and MDT in human readable format.
-.TP
-.B $ lfs df -i
-Lists inode usage per OST and MDT
-.TP
-.B lfs df --pool <filesystem>[.<pool>] | <pathname>
-List space or inode usage for a specific OST pool
+.B $ lfs mdts
+List all the MDTs
.TP
.B $ lfs quota -u bob /mnt/lustre
List quotas of user `bob'
.TP
.B $ lfs setquota -t -u --block-grace 1000 --inode-grace 1w4d /mnt/lustre
Set grace times for user quotas: 1000 seconds for block quotas, 1 week and 4 days for inode quotas
+.SH NOTES
+The usage of \fBlfs hsm_*\fR, \fBlfs setstripe\fR, \fBlfs migrate\fR, \fBlfs setdirstripe\fR,
+\fBlfs getdirstripe\fR, \fBlfs mkdir\fR and \fBlfs project\fR are explained in separate
+man pages.
.SH BUGS
The \fBlfs find\fR command isn't as comprehensive as \fBfind\fR(1).
-Report bugs using http://bugzilla.lustre.org.
.SH AUTHOR
-The lfs command is part of the Lustre filesystem. Contact http://www.lustre.org/
+The lfs command is part of the Lustre filesystem.
.SH SEE ALSO
.BR lctl (8),
+.BR lfs-df (1),
+.BR lfs-getdirstripe (1),
+.BR lfs-hsm (1),
+.BR lfs-mkdir (1),
+.BR lfs-migrate (1),
+.BR lfs-project (1),
+.BR lfs-setdirstripe (1),
+.BR lfs-setquota (1),
+.BR lfs-setstripe (1),
.BR lustre (7)
git://git.whamcloud.com / fs / lustre-release.git / blobdiff