AWS’ S3 storage service at the moment launched a less expensive possibility for retaining knowledge within the cloud — so long as builders are keen to surrender just a few 9s of availability in return for saving as much as 20 p.c in comparison with the usual S3 value for purposes that want rare entry. The identify for this new S3 tier: S3 One Zone-Rare Entry.
S3 was among the many first companies AWS provided. Through the years, the corporate added a few additional tiers to the usual storage service. There’s the S3 Normal tier with the promise of 99.999999999 p.c sturdiness and 99.99 p.c availability and S3 Normal-Rare Entry with the identical sturdiness promise and 99.9 p.c availability. There’s additionally Glacier for chilly storage.
Information saved within the Normal and Normal-Rare entry tiers is replicated throughout three or extra availability zones. Because the identify implies, the primary distinction between these and the One Zone-Rare Entry tier is that with this cheaper possibility, all the info sits in just one availability zone. It’s nonetheless replicated throughout totally different machines, but when that zone goes down (or is destroyed), you may’t entry your knowledge.
Due to this, AWS solely guarantees 99.5 p.c availability and solely gives a 99 p.c SLA. When it comes to options and sturdiness, although, there’s no distinction between this tier and the opposite S3 tiers.
As Amazon CTO Werner Vogels famous in a keynote on the AWS Summit in San Francisco at the moment, it’s the replication throughout availability zones that defines the storage price. In his view, this new service ought to be used for knowledge that’s sometimes accessed however could be replicated.
An availability of 99.5 p.c does imply that it is best to anticipate to expertise a day or two per 12 months the place you may’t entry your knowledge, although. For some purposes, that’s completely acceptable, and Vogels famous that he expects AWS prospects to make use of this for secondary backup copies or for storing media information that may be replicated.