| --- |
| title: Apache Mesos - Disk Isolator Based on 'du' in Mesos Containerizer |
| layout: documentation |
| --- |
| |
| # Disk Isolator Based on 'du' in Mesos Containerizer |
| |
| The `disk/du` (previously `posix/disk`) isolator provides basic disk |
| isolation. It is able to report the disk usage for each sandbox and |
| optionally enforce the disk quota. It can be used on both Linux and OS |
| X. |
| |
| To enable the `disk/du` isolator, append `disk/du` to the |
| `--isolation` flag when starting the agent. |
| |
| By default, the disk quota enforcement is disabled. To enable it, |
| specify `--enforce_container_disk_quota` when starting the agent. |
| |
| The `disk/du` isolator reports disk usage for each sandbox by |
| periodically running the `du` command. The disk usage can be retrieved |
| from the resource statistics endpoint |
| ([/monitor/statistics](../endpoints/slave/monitor/statistics.md)). |
| |
| The interval between two `du`s can be controlled by the agent flag |
| `--container_disk_watch_interval`. For example, |
| `--container_disk_watch_interval=1mins` sets the interval to be 1 |
| minute. The default interval is 15 seconds. |
