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fornax-cloud-access-API

Repository for cloud access considerations

Server API changes

The suggested changes to the API is to add a column to the SIA (for now, and maybe others later) called cloud_access, that has JSON text that describe where the data is located on the cloud.

An example JSON text to access the file chandra/data/byobsid/0/3480/primary/acisf03480N004_cntr_img2.jpg from a bucket called heasarc-bucket is given below:

{
    "aws": 
        { 
        "bucket": "heasarc-bucket", 
        "region": "us-east-1", 
        "access": "region", 
        "path": "chandra/data/byobsid/0/3480/primary/acisf03480N004_cntr_img2.jpg" 
        }
}

The region of the bucket is given in "region".

The type of access, which gives information on on data availability, is in "access", and it can be one of:

  • "region": for buckets accessible from withing the same region.
  • "open": for buckets that can be accessed from anywhere.
  • "restricted": for buckets need some type of authentication.
  • "none": for data that are not accessible for some reason.

The following are example XML files for the returned metadata from the HEASARC and MAST service.