1 .TH lfs 1 "2009 Jan 29" Lustre "user utilities"
3 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
8 .B lfs changelog [--follow] <mdtname> [startrec [endrec]]
10 .B lfs changelog_clear <mdtname> <id> <endrec>
12 .B lfs check <mds|osts|servers>
14 .B lfs data_version [-n] \fB<filename>\fR
16 .B lfs df [-i] [-h] [--lazy] [--pool|-p <fsname>[.<pool>] [path]
18 .B lfs fid2path [--link <linkno>] <fsname|rootpath> <fid> ...
20 .B lfs find <directory|filename>
21 \fB[[!] --atime|-A [-+]N] [[!] --mtime|-M [-+]N] [[!] --ctime|-C [+-]N]
22 \fB[--maxdepth|-D N] [[!] --mdt|-m <uuid|index,...>] [--name|-n pattern]
23 \fB[[!] --ost|-O <uuid|index,...>] [--print|-p] [--print0|-P]
24 \fB[[!] --size|-s [-+]N[kMGTPE]]
25 \fB[[!] --stripe-count|-c [+-]<stripes>]
26 \fB[[!] --stripe-index|-i <index,...>]
27 \fB[[!] --stripe-size|-S [+-]N[kMG]]
28 \fB[[!] --layout|-L raid0,released]
29 \fB[--type |-t {bcdflpsD}] [[!] --gid|-g|--group|-G <gname>|<gid>]
30 \fB[[!] --uid|-u|--user|-U <uname>|<uid>] [[!] --pool <pool>]\fR
32 .B lfs getname [-h]|[path ...]
34 .B lfs getstripe [--obd|-O <uuid>] [--quiet|-q] [--verbose|-v]
35 \fB[--stripe-count|-c ] [--stripe-index|-i] [--mdt-index|-M]
36 \fB[--stripe-size|-S] [--directory|-d]
38 \fB[--pool|-p] [--recursive|-r] [--raw|-R] <dirname|filename> ...\fR
40 .B lfs migrate \fB-m <mdt_index>\fR
43 .B lfs migrate [\fB-c | --stripe-count <stripe_count>\fR]
44 [\fB-i | --stripe-index <start_ost_idx>\fR]
45 [\fB-S | --stripe-size <stripe_size>\fR]
46 [\fB-p | --pool <pool_name>\fR]
47 [\fB-o | --ost-list <ost_indices>\fR]
49 [\fB-n | --non-block\fR]
52 .B lfs mkdir [\fB-c | --count <stripe_count>\fR]
53 [\fB-i | --index <mdt_idx>\fR]
54 [\fB-h | --hash-type <hash_name>\fR]
55 [\fB-m | --mode <mode>\fR]
56 [\fB-D | --default\fR]
65 .B lfs path2fid [--parents] <path> ...
67 .B lfs pool_list <filesystem>[.<pool>] | <pathname>
69 .B lfs quota [-q] [-v] [-o obd_uuid|-I ost_idx|-i mdt_idx] [-u <uname>| -u <uid>|-g <gname>| -g <gid>] <filesystem>
71 .B lfs quota -t <-u|-g> <filesystem>
73 .B lfs quotacheck [-ug] <filesystem>
75 .B lfs quotaon [-ugf] <filesystem>
77 .B lfs quotaoff [-ug] <filesystem>
79 .B lfs setquota <-u|--user|-g|--group> <uname|uid|gname|gid>
80 \fB[--block-softlimit <block-softlimit>]
81 \fB[--block-hardlimit <block-hardlimit>]
82 \fB[--inode-softlimit <inode-softlimit>]
83 \fB[--inode-hardlimit <inode-hardlimit>]
86 .B lfs setquota <-u|--user|-g|--group> <uname|uid|gname|gid>
87 \fB[-b <block-softlimit>] [-B <block-hardlimit>]
88 \fB[-i <inode-softlimit>] [-I <inode-hardlimit>]
91 .B lfs setquota -t <-u|-g>
92 \fB[--block-grace <block-grace>]\fR
93 \fB[--inode-grace <inode-grace>]\fR
96 .B lfs setquota -t <-u|-g>
97 \fB[-b <block-grace>] [-i <inode-grace>]\fR
100 .B lfs setstripe [--stripe-size|-S stripe_size] [--stripe-count|-c stripe_count]
101 \fB[--stripe-index|-i start_ost_index] [--pool|-p <poolname>]
102 \fB[--ost-list|-o <ost_indices>] <directory|filename>\fR
104 .B lfs setstripe -d <dir>
111 can be used to create a new file with a specific striping pattern, determine
112 the default striping pattern, gather the extended attributes (object numbers
113 and location) for a specific file. It can be invoked interactively without any
114 arguments or in a non-interactive mode with one of the arguments supported.
116 The various options supported by lfs are listed and explained below:
119 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.
122 Indicate that changelog records previous to <endrec> are no longer of
123 interest to a particular consumer <id>, potentially allowing the MDT to
124 free up disk space. An <endrec> of 0 indicates the current last record.
125 Changelog consumers must be registered on the MDT node using \fBlctl\fR.
128 Display the status of MDS or OSTs (as specified in the command) or all the servers (MDS and OSTs)
130 .B df [-i] [-h] [--lazy] [--pool|-p <fsname>[.<pool>] [path]
131 Report filesystem disk space usage or inodes usage (with \fB-i\fR) of each
132 MDT/OST, or a subset of OSTs if a pool is specified with \fB-p\fR. By default
133 print the usage of all mounted Lustre filesystems, otherwise if \fBpath\fR is
134 specified print only the usage of that filesystem. If \fB-h\fR is given, the
135 output is printed in \fIh\fRuman readable format, using SI base-2 suffixes
136 for \fBM\fRega-, \fBG\fRiga-, \fBT\fRera-, \fBP\fReta-, or \fBE\fRxabytes.
137 The \fB--lazy\fR/\fB-l\fR option skips any OST that is currently disconnected
138 from the client. This avoids blocking the \fBdf\fR output if an OST is down,
139 and only returns the space on the OSTs that can currently be accessed.
142 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--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 \fIfiles with the parameter OR MORE\fR, while \fB-\fR before a numeric value means \fIfiles with the parameter OR LESS\fR.
144 .B getname [-h]|[path ...]
145 Report all the Lustre mount points and the corresponding Lustre filesystem
146 instance. If one or more \fBpath\fR entries are provided, then only the
147 Lustre instance for these mount points is returned. If the path given is not on
148 a Lustre instance 'No such device' is reported.
152 List all the OSTs for all mounted filesystems. If a \fBpath\fR is provided
153 that is located on a lustre mounted file system then only the OSTs belonging
154 to that filesystem are displayed.
156 .B getstripe [--obd|-O <uuid>] [--quiet|-q] [--verbose|-v]
157 \fB[--count | -c ] [--index | -i | --offset | -o ]
158 \fB[--pool | -p ] [--size | -s ] [--directory | -d ]
160 \fB[--recursive | -r ] [--raw | -R ] <dirname|filename>\fR
162 List the striping information for a given filename or directory tree.
163 By default the stripe count, size, and offset will be returned. If you
164 only want specific striping information then the options of
172 can be used to return only the specific fields.
176 option is specified, the stripe information is printed without substituting the
177 filesystem's default values for unspecified fields. If the striping EA is not
178 set, 0, 0, and -1 will be printed for the stripe count, size, and offset
180 In the case where you only want details about the files' object id
183 option is used. Additional information available about striping can be
186 The default behavior when a directory is specified is to list the striping
187 information for all files within the specified directory (like
189 This can be expanded with
191 which will recurse into all subdirectories.
192 If you wish to get striping information for only the specified directory, then
194 can be used to limit the information, like
196 You can limit the returned files to those with objects on a specific OST with
199 .B setstripe [--stripe-count|-c stripe_count] [--stripe-size|-S stripe_size]
200 \fB[--stripe-index|-i start_ost_index] [--pool <poolname>]
201 \fB[--ost-index|-o <ost_indices>] <dirname|filename>\fR
203 To create a new file, or set the directory default, with the specified striping
206 is the number of OSTs to stripe a file over. A
208 of 0 means to use the filesystem-wide default stripe count (default 1), and a
210 of -1 means to stripe over all available OSTs. The
212 is the number of bytes to store on each OST before moving to the next OST. A
214 of 0 means to use the filesystem-wide default stripe_size (default 1MB). The
216 is the OST index (starting at 0) on which to start striping for this file. A
218 of -1 allows the MDS to choose the starting index and it is strongly
219 recommended, as this allows space and load balancing to be done by the MDS as
222 option is used to specify the exact stripe layout on the file system.
224 is a list of OSTs referenced by their indices, which are specified in decimal
225 or hex form and can be obtained using the
227 command. The list format consists of individual OST indices and index ranges
228 separated by commas, e.g. 1,2-4,7. The
230 option may be specified multiple times to stripe across the union of all listed
233 option is combined with
237 must agree with the number of OSTs in
241 option is combined with
245 must be in the OST list, and it will be used as the index on which to start
246 striping the file. Otherwise the striping will occur in the order specified in
250 is the name of a predefined pool of OSTs (see
252 that will be used for striping. The
257 will be used as well; the
259 must be part of the pool or an error will be returned.
262 Delete the default striping on the specified directory.
264 .B fid2path [--link <linkno>] <fsname|rootpath> <fid> ...
265 Print out the pathname(s) for the specified \fIfid\fR(s) from the filesystem
266 mounted at \fBrootpath\fR or named \fBfsname\fR. If a file has multiple
267 hard links, then all of the pathnames for that file are printed, unless
268 \fB--link\fR limits the printing to only the specified link number (starting
269 at 0, in no particular order). If multiple fids are specified, but only a
270 single pathname is needed for each file, use \fB--link 0\fR.
272 .B path2fid [--parents] <path> ...
273 Print out the FIDs for the specified \fBpath(s)\fR. If multiple pathnames
274 are given, then they will be printed one per line with the path as prefix.
275 The \fB--parents\fR switch makes it output the parent FID and name(s) of the
276 given entries. If an entry has multiple links, these are displayed on a single
280 .RI { filesystem }[ .poolname "] | {" pathname }
286 .IR filesystem.pool .
288 .B quota [-q] [-v] [-o obd_uuid|-i mdt_idx|-I ost_idx] [-u|-g <uname>|<uid>|<gname>|<gid>] <filesystem>
289 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. -q disables printing of additional descriptions (including column titles).
291 .B quota -t <-u|-g> <filesystem>
292 To display block and inode grace times for user (-u) or group (-g) quotas
294 .B quotacheck [-ugf] <filesystem> (deprecated as of 2.4.0)
295 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.
297 .B quotaon [-ugf] <filesystem> (deprecated as of 2.4.0)
298 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>)
300 .B quotaoff [-ugf] <filesystem> (deprecated as of 2.4.0)
301 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>=""
303 .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>
304 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
306 .B setquota -t [-u|-g] [--block-grace <block-grace>] [--inode-grace <inode-grace>] <filesystem>
307 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
309 .B swap_layouts <filename1> <filename2>
310 Swap the data (layout and OST objects) of two regular files. The
311 two files have to be in the same filesystem, owned by the same user,
312 reside on the same MDT and writable by the user.
314 Swapping the layout of two directories is not permitted.
316 .B data_version [-n] <filename>
317 Display current version of file data. If -n is specified, data version is read
318 without taking lock. As a consequence, data version could be outdated if there
319 is dirty caches on filesystem clients, but this will not force data flushes and
320 has less impact on filesystem.
322 Even without -n, race conditions are possible and data version should be
323 checked before and after an operation to be confident the data did not change
327 lfs mkdir is documented in the man page: lfs-mkdir(1). NOTE:
329 is an alias of the command
333 lfs mv is deprecated, use lfs
341 Output the build version of the lfs utility. Use "lctl lustre_build_version" to get the version of the Lustre kernel modules
344 Provides brief help on the various arguments
347 Quit the interactive lfs session
350 .B $ lfs setstripe -s 128k -c 2 /mnt/lustre/file1
351 This creates a file striped on two OSTs with 128kB on each stripe.
353 .B $ lfs setstripe -d /mnt/lustre/dir
354 This deletes a default stripe pattern on dir. New files will use the default striping pattern created therein.
356 .B $ lfs getstripe -v /mnt/lustre/file1
357 Lists the detailed object allocation of a given file
359 .B $ lfs find /mnt/lustre
360 Efficiently lists all files in a given directory and its subdirectories
362 .B $ lfs find /mnt/lustre -mtime +30 -type f -print
363 Recursively list all regular files in given directory more than 30 days old
365 .B $ lfs find --obd OST2-UUID /mnt/lustre/
366 Recursively list all files in a given directory that have objects on OST2-UUID.
368 .B $ lfs check servers
369 Check the status of all servers (MDT, OST)
378 Lists space usage per OST and MDT in human readable format.
381 Lists inode usage per OST and MDT
383 .B $ lfs df --pool <filesystem>[.<pool>] | <pathname>
384 List space or inode usage for a specific OST pool
386 .B $ lfs quota -u bob /mnt/lustre
387 List quotas of user `bob'
389 .B $ lfs quota -t -u /mnt/lustre
390 Show grace times for user quotas on /mnt/lustre
392 .B $ lfs quotachown -i /mnt/lustre
393 Change file owner and group
395 .B $ lfs quotacheck -ug /mnt/lustre
396 Quotacheck for user and group - will turn on quotas after making the check.
398 .B $ lfs quotaon -ug /mnt/lustre
399 Turn quotas of user and group on
401 .B $ lfs quotaoff -ug /mnt/lustre
402 Turn quotas of user and group off
404 .B $ lfs setquota -u bob --block-softlimit 2000000 --block-hardlimit 1000000 /mnt/lustre
405 Set quotas of user `bob': 1GB block quota hardlimit and 2 GB block quota softlimit
407 .B $ lfs setquota -t -u --block-grace 1000 --inode-grace 1w4d /mnt/lustre
408 Set grace times for user quotas: 1000 seconds for block quotas, 1 week and 4 days for inode quotas
411 The \fBlfs find\fR command isn't as comprehensive as \fBfind\fR(1).
413 The lfs command is part of the Lustre filesystem.
416 .BR lfs-setdirstripe (1),
417 .BR lfs-getdirstripe (1),