LU-11213 doc: update lfs-setdirstripe man 'space' hash

Add 'space' hash description for lfs-setdirstripe man.

Test-Parameters: trivial
Signed-off-by: Lai Siyao <lai.siyao@whamcloud.com>
Change-Id: I847618c5c98925ebc7b1bd124173ffb5adfe90dd
Reviewed-on: https://review.whamcloud.com/35208
Tested-by: Jenkins
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Joseph Gmitter <jgmitter@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>

diff --git a/lustre/doc/lfs-setdirstripe.1 b/lustre/doc/lfs-setdirstripe.1
index 9f52fa8..fda8be3 100644 (file)
--- a/lustre/doc/lfs-setdirstripe.1
+++ b/lustre/doc/lfs-setdirstripe.1
@@ -44,6 +44,13 @@ Fowler-Noll-Vo (FNV-1a) hash algorithm.  This provides
 reasonably uniform, but not cryptographically strong,
 hashing of the filename. (default)
 .TP
+.B space
+This can only be set on plain directory default striping.
+Newly created sub-directories will be distributed on all
+MDTs by MDT space usage. Note that this is suggested to
+be set on lustre ROOT, so that all sub-directories under
+lustre ROOT are distributed among all MDTs.
+.TP
 .B all_char
 Sum of ASCII characters modulo number of MDTs. This
 provides weak hashing of the filename, and is suitable