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authorKevin Wolf <kwolf@redhat.com>2011-08-26 15:27:13 +0200
committerKevin Wolf <kwolf@redhat.com>2011-08-29 14:42:39 +0200
commita22f123ca3d3c09a77af4341ed1fbcc175b54f1d (patch)
treeb9992c37d4a4645e6282375c669ae1e771206a1c /qemu-img-cmds.hx
parentc488c7f649106d09df76f697adccbe6e72520b26 (diff)
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qemu-img: Require larger zero areas for sparse handling
By default, require 4k of consecutive zero bytes for qemu-img to make the output file sparse by not issuing a write request for the zeroed parts. Add an -S option to allow users to tune this setting. This helps to avoid situations where a lot of zero sectors and data sectors are mixed and qemu-img tended to issue many tiny 512 byte writes. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'qemu-img-cmds.hx')
-rw-r--r--qemu-img-cmds.hx4
1 files changed, 2 insertions, 2 deletions
diff --git a/qemu-img-cmds.hx b/qemu-img-cmds.hx
index 1299e83..4be00a5 100644
--- a/qemu-img-cmds.hx
+++ b/qemu-img-cmds.hx
@@ -28,9 +28,9 @@ STEXI
ETEXI
DEF("convert", img_convert,
- "convert [-c] [-p] [-f fmt] [-t cache] [-O output_fmt] [-o options] [-s snapshot_name] filename [filename2 [...]] output_filename")
+ "convert [-c] [-p] [-f fmt] [-t cache] [-O output_fmt] [-o options] [-s snapshot_name] [-S sparse_size] filename [filename2 [...]] output_filename")
STEXI
-@item convert [-c] [-p] [-f @var{fmt}] [-O @var{output_fmt}] [-o @var{options}] [-s @var{snapshot_name}] @var{filename} [@var{filename2} [...]] @var{output_filename}
+@item convert [-c] [-p] [-f @var{fmt}] [-O @var{output_fmt}] [-o @var{options}] [-s @var{snapshot_name}] [-S @var{sparse_size}] @var{filename} [@var{filename2} [...]] @var{output_filename}
ETEXI
DEF("info", img_info,