{
    "CinderVolumes.modify_volume_metadata": [
        {
            "args": {},
            "runner": {
                "type": "constant",
                "times": 10,
                "concurrency": 2
            },
            "context": {
                "volumes": {
                    "size": 1
                },
                "users": {
                    "tenants": 2,
                    "users_per_tenant": 2
                }
            }
        }
    ]
}