LU-3531 doc: update lfs migrate and mkdir documentation.

[fs/lustre-release.git] / lustre / utils / lfs.c

diff --git a/lustre/utils/lfs.c b/lustre/utils/lfs.c
index e5370e9..9059890 100644 (file)
--- a/lustre/utils/lfs.c
+++ b/lustre/utils/lfs.c
@@ -356,13 +356,29 @@ command_t cmdlist[] = {
        {"swap_layouts", lfs_swap_layouts, 0, "Swap layouts between 2 files.\n"
         "usage: swap_layouts <path1> <path2>"},
        {"migrate", lfs_setstripe, 0,
-        "migrate file/directory between MDTs, or migrate file from one OST "
+        "migrate a directory between MDTs.\n"
+        "usage: migrate --mdt-index <mdt_idx> [--verbose|-v] "
+        "<directory>\n"
+        "\tmdt_idx:      index of the destination MDT\n"},
+       {"migrate", lfs_setstripe, 0,
+        "migrate file objects from one OST "
         "layout\nto another (may be not safe with concurent writes).\n"
-        "usage: migrate   [--mdt-index|-m <mdt_idx>] [--verbose|-v] "
-        "<directory|filename>\n"
-        "\tmdt_idx:      MDT index to migrate to\n"
-        " or\n"
-        MIGRATE_USAGE},
+        "usage: migrate "
+        "[--stripe-count|-c] <stripe_count>\n"
+        "[--stripe-index|-i] <start_ost_index>\n"
+        "[--stripe-size|-S] <stripe_size>\n"
+        "[--pool|-p] <pool_name>\n"
+        "[--ost-list|-o] <ost_indices>\n"
+        "[--block|-b]\n"
+        "[--non-block|-n]\n"
+        "<file|directory>\n"
+        "\tstripe_count:     number of OSTs to stripe a file over\n"
+        "\tstripe_ost_index: index of the first OST to stripe a file over\n"
+        "\tstripe_size:      number of bytes to store before moving to the next OST\n"
+        "\tpool_name:        name of the predefined pool of OSTs\n"
+        "\tost_indices:      OSTs to stripe over, in order\n"
+        "\tblock:            wait for the operation to return before continuing\n"
+        "\tnon-block:        do not wait for the operation to return.\n"},
        {"mv", lfs_mv, 0,
         "To move directories between MDTs. This command is deprecated, "
         "use \"migrate\" instead.\n"