Why Datastore Export API does not support Nearline storage types?

1
votes

We have recently configured automated Datastore exports to the Cloud Storage using the new Datastore Export API.

It was obvious that we'd like to use Nearline buckets to store our backups, but when we have tried to export the Datastore database to the nearline bucket we received the following error:

Caused by: com.google.api.client.http.HttpResponseException: 400 BAD_REQUEST
{
  "error": {
    "code": 400,
    "message": "Bucket xxx-xxx-xxx has storage class NEARLINE which is not supported. Must be one of regional, multi_regional, standard, durable_reduced_availability.",
    "errors": [
      {
        "message": "Bucket xxx-xxx-xxx has storage class NEARLINE which is not supported. Must be one of regional, multi_regional, standard, durable_reduced_availability.",
        "domain": "global",
        "reason": "badRequest"
      }
    ],
    "status": "INVALID_ARGUMENT"
  }
}

I haven't found anything in the docs, regarding the Cloud Storage bucket type that should be used.

Is it a documentation or service bug?

1
google-apigoogle-cloud-datastoregoogle-cloud-storage

1 Answers

2
votes

This is correct behaviour. Nearline and Coldline are not supported because of the way that the export writes to GCS.

You can export to standard and then change to nearline after. You can even automate this with a SetStorageClass lifecycle action.