Infrastructure Layer
Disk Attack
The Disk Gremlin fills up a target block device (specified by the filesystem on which it is mounted) by writing to files at the destination specified by --dir. The number of files written directly corresponds to the number of --workers specified.
Options
| Parameter | Flag | Required | Default | Version | Description |
|---|---|---|---|---|---|
| Dir | -d path | False | /tmp | 1.8.0 | The root directory for the IO attack. |
| Workers | -w int | False | 1 | 1.8.0 | The number of diskwrite workers to run concurrently. |
| Block Size | -b int | False | 4 | 1.8.0 | Number of Kilobytes (KB) that are read/written at a time. |
| Volume Percentage | -p <0-100> | False | 100 | 1.8.0 | Percent of Volume to fill (0100). |
| Length | -l int | False | 60 | 1.8.0 | The length of the attack (seconds). |
Note
Azure Windows instances may throttle disk I/O such that large disk attacks will take an excessive amount of time to complete.