{
  "extrakey": [
    {
      "foo": "bar"
    }
  ],
  "subsystems": [
    {
      "subsystem": "bdev",
      "config": [
        {
          "params": {
            "bdev_io_pool_size": 65536,
            "bdev_io_cache_size": 256
          },
          "method": "bdev_set_options"
        },
        {
          "params": {
            "retry_count": 4,
            "timeout_us": 0,
            "nvme_adminq_poll_period_us": 100000,
            "action_on_timeout": "none",
            "nvme_ioq_poll_period_us": 0
          },
          "method": "bdev_nvme_set_options"
        }
      ]
    }
  ]
}