These cold storage facilities are specially designed and maintained without any redundant electrical infrastructure or backup generators. In order to get improved availability of the data it repeats the data which significantly helps the Microsoft to provide a 99.9% uptime SLA for Cold access versus 99.99 percent for the Hot access tier if we use the RA-GRS redundancy option.įor this reason, the social network constructed and built separate data centers near its core server farms in Oregon and North Carolina. The Cool access tier guarantees 99.9% availability, while the Hot access tier ensures 99.9%. In a recent blog post, Sriprasad Bhat, senior program manager for Azure Storage, has verified this information. In order to get the best out of the both storages i.e., the regular-access Cool Blob Storage and the hot blob storage in terms of latency and throughput, the Hot Blob Storage performs similarly. Microsoft may already have a next-generation cold storage design with increased throughput and capacity. When the study was published, Pelican's max sustained read rate per 1PB of storage was 1GB per second, and it could store more than 5PB in a single rack, meaning an entire rack's data could be transferred out in 13 days. It's a "converged design," which means that everything was built to function together, from mechanical systems to hardware and software.
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However, in 2014, it published a paper detailing Pelican, a core building element for an exascale cold storage system.Īccording to Microsoft, Pelican is a rack-scale storage device created exclusively for cold storage in the cloud. Microsoft has kept the architecture underpinning its new cold storage service under wraps. Amazon's Glacier service was launched in 2012, and Google's Cloud Storage Nearline service was released last year.įor quite some time, web-scale data center operators of the caliber of Microsoft have been looking at ways to save infrastructure costs by better aligning equipment expenditure with the sort of data being stored. Microsoft's announcement is a late response to its largest public cloud competitors, who have offered cold storage for some time. Microsoft's Azure cloud has announced a cold storage service, which provides a low-cost storage option for data that isn't accessed frequently. The "Hot" Blob storage tier costs $0.0223 to $0.061 per GB, thus customers who choose the "Cool" access tier will be able to save more than 50% on the cost of storing some of their data in Microsoft's cloud. As a result, the data center infrastructure created to hold it may be less expensive than core cloud infrastructure, with the savings passed on to the customer in the case of a cloud provider.Ĭool Blob Storage is Microsoft's new service, and it costs $0.01 to $0.048 per GB per month, depending on the area and total amount of data stored. The underlying idea behind cold storage is that while much of the data that people and businesses generate is accessed infrequently, it doesn't require the same level of availability and access speed as important applications. Amazon's Glacier service debuted in 2012, and Google's Cloud Storage Nearline option debuted last year. Microsoft's announcement is a response to its major public cloud competitors, who have offered cold-storage alternatives for some time. On its Azure cloud, Microsoft has developed a cold storage service, which provides a low-cost storage option for data that isn't accessed frequently.
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