-.TH LFS-SETDIRSTRIPE 1 2014-06-08 "Lustre" "Lustre Utilities"
+.TH LFS-SETDIRSTRIPE 1 2017-11-07 "Lustre" "Lustre Utilities"
.SH NAME
lfs setdirstripe, mkdir \- set striping pattern of a directory.
.SH SYNOPSIS
-.B lfs setdirstripe
-[\fIOPTION\fR]... \fIDIR\fR...
+.B lfs setdirstripe [\fR-cdDHioTx\fR] \fIDIR\fR...
.br
.SH DESCRIPTION
Create a striped directory with specified striping pattern. This lfs utility
is similar to
-.B lfs setstripe
+.BR lfs setstripe
, but is used to create striped directory.
+Can also be used to create directory with a foreign (free format) striping pattern (see
+.BR --foreign
+and
+.BR --xattr
+options).
.B lfs mkdir
is an alias for this command.
.SH OPTIONS
.TP
-\fB\-c\fR, \fB\-\-count\fR=\fICOUNT\fR
-Stripe over
+.BR \-c ", " \-T ", " \-\-mdt\-count =\fICOUNT\fR
+Stripe the new directory over
.I COUNT
MDTs.
.TP
-\fB\-i\fR, \fB\-\-index\fR=\fISTART_MDT_INDEX\fR
-Stripe from the MDT, whose index is
-.I START_MDT_INDEX.
+.BR \-i ", " \-\-mdt\-index =\fISTART_MDT_INDEX\fR[,\fIMDT_INDEX ...]
+Use the MDT whose index is
+.I START_MDT_INDEX
+as the master/starting MDT for the directory. If multiple
+.I MDT_INDEX
+values are given, then the stripes will be allocated on the specified
+MDT indices. If index -1 (default) is used, it will randomly pick
+.I COUNT
+less full MDTs.
.TP
-\fB\-t\fR, \fB\-\-hash\-type\fR=\fIHASH_TYPE\fR
-the hash_type of the striped directory.
+.BR \-H ", " \-\-mdt-hash =\fIHASH_TYPE\fR
+Use
+.I hash_type
+for the striped directory.
.RS 1.2i
.TP
.B fnv_1a_64
perfectly uniform distribution (e.g. sequential numbers).
.RE
.TP
-.B \-D, \-\-default_stripe
-Set the default striping pattern of the directory. Newly created
+.BR \-d ", " \-\-delete
+Delete the default striping layout from the directory. New subdirectories
+created in this directory will inherit the global default directory layout
+(by default they will not be striped).
+.TP
+.BR \-D ", " \-\-default
+Set the default striping pattern of subdirectories. Newly created
sub-directories will use the new default striping pattern,
but existing sub-directories will not be affected. The newly
-created sub-directories will also inherit the current default
+created sub-directories will also inherit the specified default
striping pattern. Only default stripe count is supported for now.
+
+Note that striping all directories across all MDTs by default is not
+recommended at this time, as the clients will have to do more RPCs to
+create and access each directory, hurting performance rather than
+improving it. Default striped directories are preferred for cases
+where large subdirectories will be created (e.g. file-per-process
+job output directories).
.TP
-\fB\-m\fR, \fB\-\-mode\fR=\fIMODE\fR
-Set the file access mode of the new directory to the specified
-numeric value (typically octal) as specified in
-.BR chmod (1),
-and is not affected by the current
+.BR \-o ", " \-\-mode =\fIMODE\fR
+Set the file access permissions of the new directory to the specified
+numeric
+.I MODE
+(typically octal), as with
+.BR chmod (1).
+It is not affected by the current
.BR umask (1p).
+.TP
+.BR \-\-foreign[=type]
+Create a directory with a foreign (non-Lustre/free format, see
+.BR \-\-xattr
+option) striping. Where
+.BR type
+specifies a known foreign type (like
+.BR none
+,
+.BR daos
+, ...) or a 32-bit numeric type.
+.TP
+.BR \-\-flags =\fI<hex>\fR
+Specify a bitmask of flags.
+.TP
+.BR \-x ", " \-\-xattr =\fISTRING\fR
+Specify a string to be used as a foreign (free format) striping.
.SH NOTE
.PP
-The "lfs setdirstripe" command is only executable by root unless
-"mdt.*.enable_remote_dir_gid" is set via "lctl set_param" to be either a
-non-zero GID to limit it to a single group (e.g. "operator" or "admin"),
-or "-1" to allow any group to create remote directories.
+The
+.B lfs setdirstripe
+command is only executable by root unless
+.B "mdt.*.enable_remote_dir_gid"
+is set on the MDS via
+.B lctl set_param
+to be either a non-zero GID to limit it to a single group
+(e.g. "operator" or "admin"), or "-1" to allow any group
+to create remote directories.
The root of the file system is on MDT0000, and directories and files inherit the
MDT of their parent directory unless a different MDT is specified with this
if any of the intermediate MDTs are offline.
.SH EXAMPLES
.TP
-.B $ lfs setdirstripe -c 2 -i 1 -t all_char /mnt/lustre/dir1
+.B $ lfs setdirstripe -c 2 -i 1 -H all_char /mnt/lustre/dir1
This creates a directory striped on two MDTs, whose first stripe is on
.B MDT0001
(MDT index 1), and whose hash type is
.BR all_char .
-.SH BUGS
-Default stripe cannot be deleted once it is set.
+.TP
+.B $ lfs mkdir --foreign=daos --xattr PUUID:CUUID /mnt/lustre/dir1
+This creates
+.B dir1
+with foreign (non-lustre/free format)
+.B PUUID:CUUID
+striping/LMV EA.
.SH AVAILABILITY
-The lfs setdirstripe command is part of the Lustre filesystem.
+The
+.B lfs setdirstripe
+command is part of the Lustre filesystem.
.SH SEE ALSO
+.BR lctl (8),
.BR lfs (1),
.BR lfs-getdirstripe (1),
.BR lfs-setstripe (1),
git://git.whamcloud.com / fs / lustre-release.git / blobdiff