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LU-11025 dne: introduce new directory hash type: "crush"
[fs/lustre-release.git]
/
lustre
/
doc
/
lfs-setdirstripe.1
diff --git
a/lustre/doc/lfs-setdirstripe.1
b/lustre/doc/lfs-setdirstripe.1
index
9f52fa8
..
8d48380
100644
(file)
--- a/
lustre/doc/lfs-setdirstripe.1
+++ b/
lustre/doc/lfs-setdirstripe.1
@@
-29,9
+29,9
@@
Use the MDT whose index is
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
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
.
+MDT indices. If index -1 (default) is used, it will
prefer to select
+.
B
COUNT
+
MDTs proportional to the free space and inodes on each
.
.TP
.BR \-H ", " \-\-mdt-hash =\fIHASH_TYPE\fR
Use
.TP
.BR \-H ", " \-\-mdt-hash =\fIHASH_TYPE\fR
Use
@@
-39,6
+39,11
@@
Use
for the striped directory.
.RS 1.2i
.TP
for the striped directory.
.RS 1.2i
.TP
+.B crush
+CRUSH hash algorithm. This is a consistent hash
+algorithm, so minimum sub files need to relocate
+during directory restripe.
+.TP
.B fnv_1a_64
Fowler-Noll-Vo (FNV-1a) hash algorithm. This provides
reasonably uniform, but not cryptographically strong,
.B fnv_1a_64
Fowler-Noll-Vo (FNV-1a) hash algorithm. This provides
reasonably uniform, but not cryptographically strong,