95f21c5c6d
According to `man blockdev':
--getsize
Print device size (32-bit!) in sectors.
Deprecated in favor of the --getsz option.
...
--getsz
Get size in 512-byte sectors.
Hence, occurrences of `--getsize' should be replaced with `--getsz',
which this commit has achieved as follows:
$ cd "$repo"
$ git grep -l -e --getsz
Documentation/device-mapper/delay.txt
Documentation/device-mapper/dm-crypt.txt
Documentation/device-mapper/linear.txt
Documentation/device-mapper/log-writes.txt
Documentation/device-mapper/striped.txt
Documentation/device-mapper/switch.txt
$ cd Documentation/device-mapper
$ sed -i s/getsize/getsz/g *
Signed-off-by: Michael Witten <mfwitten@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
27 lines
724 B
Text
27 lines
724 B
Text
dm-delay
|
|
========
|
|
|
|
Device-Mapper's "delay" target delays reads and/or writes
|
|
and maps them to different devices.
|
|
|
|
Parameters:
|
|
<device> <offset> <delay> [<write_device> <write_offset> <write_delay>]
|
|
|
|
With separate write parameters, the first set is only used for reads.
|
|
Offsets are specified in sectors.
|
|
Delays are specified in milliseconds.
|
|
|
|
Example scripts
|
|
===============
|
|
[[
|
|
#!/bin/sh
|
|
# Create device delaying rw operation for 500ms
|
|
echo "0 `blockdev --getsz $1` delay $1 0 500" | dmsetup create delayed
|
|
]]
|
|
|
|
[[
|
|
#!/bin/sh
|
|
# Create device delaying only write operation for 500ms and
|
|
# splitting reads and writes to different devices $1 $2
|
|
echo "0 `blockdev --getsz $1` delay $1 0 0 $2 0 500" | dmsetup create delayed
|
|
]]
|