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Original file line number | Diff line number | Diff line change |
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dm-delay | ||
======== | ||
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Device-Mapper's "delay" target delays reads and/or writes | ||
and maps them to different devices. | ||
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Parameters: | ||
<device> <offset> <delay> [<write_device> <write_offset> <write_delay>] | ||
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With separate write parameters, the first set is only used for reads. | ||
Delays are specified in milliseconds. | ||
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Example scripts | ||
=============== | ||
[[ | ||
#!/bin/sh | ||
# Create device delaying rw operation for 500ms | ||
echo "0 `blockdev --getsize $1` delay $1 0 500" | dmsetup create delayed | ||
]] | ||
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||
[[ | ||
#!/bin/sh | ||
# Create device delaying only write operation for 500ms and | ||
# splitting reads and writes to different devices $1 $2 | ||
echo "0 `blockdev --getsize $1` delay $1 0 0 $2 0 500" | dmsetup create delayed | ||
]] |
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