Azure’s new cool blob is now GA. But what is cool blob?
Well cool blob is a new blob storage feature for data that is accessed infrequently. In other words it’s good for backups, archives, scientific data etc.
The price of a cool blob is extremely low, between 1 to 1.6 cents per GB per month depending on region.
Cool blobs come with a 99% SLA compared with the 99.9% SLA offered on it’s hot tier. Azure cool blobs API is 100% compatible with existing blob storage offerings.
The Service is only available using the new modern ARM deployment, so if for some reason you need to use classic deployment then you cant take advantage of the new service. Also the service is offered as a block blob for unstructured data, so it can’t be used to store IAAS VHD’s, this makes sense as VHD’s need random read and write operations.
You can read more on the new offering at the Azure Blog over here