dm-delay

The dm-delay target introduces delays for read, write or flush operations. This target is intended as a test tool for simulating variations in the response time of a block device.

Zoned Block Device Restrictions

The same zone alignment restrictions that apply to the dm-linear target also apply to dm-delay.

Examples

dm-delay detailed documentation and usage examples can be found in the kernel source code documentation file Documentation/admin-guide/device-mapper/delay.rst.