The Azure Blob service supports a simple two-level hierarchy for blobs. There is a single level of containers, each of which might contain zero or more blobs. Containers might not contain other containers.
In the Blob service, a blob resource is addressed as follows:
http://{account}.blob.core.windows.net/{container}/{blob}
The {account}
, {container}
, and {blob}
parts represent the names of the storage account, container, and blob, respectively.
This addressing convention works for most uses of blobs. In certain situations, we need to place content inside the root space. Microsoft added support for a root container named $root
to the Blob service so that it could host content.