> If the access and secret key are blank they will be loaded from the usual ~/.aws/. If you are on another S3 compatible provider, e.g. Linode, then your config should be:

```json
{
  "Datastore": {
  ...

    "Spec": {
      "mounts": [
        {
          "child": {
            "type": "s3ds",
            "region": "us-east-1",
            "bucket": "$bucketname",
            "rootDirectory": "$bucketsubdirectory",
            "regionEndpoint": "us-east-1.linodeobjects.com",
            "accessKey": "",
            "secretKey": ""
          },
          "mountpoint": "/blocks",
          "prefix": "s3.datastore",
          "type": "measure"
        },
```