![]() Each Storage Pod in a given vault has the same number of drives, and the drives are all the same size.ĭrives in the same drive position in each of the 20 Storage Pods are grouped together into a storage unit we call a tome. Distributing Data Across 20 Storage PodsĪ Backblaze Vault is comprised of 20 Storage Pods, with the data evenly spread across all 20 pods. In addition to leveraging our low-cost Storage Pods, Vaults take advantage of the cost advantage of consumer-grade hard drives and cleanly handle their common failure modes. The original Storage Pod systems provided good protection for data and Vaults continue that tradition while adding another layer of protection. Putting The Intelligence in the SoftwareĪnother design principle for Backblaze is to anticipate that all hardware will fail and build intelligence into our cloud storage management software so that customer data is protected from hardware failure. ![]() As with the Storage Pods themselves, the new Vault storage software relies on tried and true technologies used in a straightforward way to build a simple, reliable, and inexpensive system.Ī Backblaze Vault is the combination of the Backblaze Vault cloud storage software and the Backblaze Storage Pod hardware. The Vault design follows the overriding design principle that Backblaze has always followed: keep it simple. Backblaze Vault Architecture for Cloud Storage Back in 2009, we shared the design of the original Storage Pod hardware we developed here we’ll share the architecture and approach of the cloud storage software that makes up a Backblaze Vault. Backblaze Vaults are not only incredibly durable, scalable, and performant, but they dramatically improve availability and operability, while still being incredibly cost-efficient at storing data. Storage Vaults form the core of Backblaze’s cloud services. If not, please add a comment and we’ll be happy to address your questions. We trust that you will be able to sort out the old from the new and make sense of what’s changed. We’ve left the original 135 comments intact, although some of them might be non sequiturs after the changes to the post. We’ve updated the details here and there in the text from the original post that was published on our blog on March 11, 2015. And, as followers of our Hard Drive Stats reports will be interested in knowing, we’ve just started testing our first 16 TB drives, which are twice the size of the biggest drives we used back at the time of this post - then a whopping eight TB. In July of 2018, we took a deep dive into the calculation and found our durability closer to eleven nines (and went into detail on the calculations used to arrive at that number). Shortly thereafter, it was upped to eight nines. In the original post, we discussed having durability of seven nines. We’re approaching one exabyte of data stored for our customers (almost seven times the 150 petabytes back then), and we’ve recovered over 41 billion files for our customers, up from the 10 billion in the 2015 post. We have three data centers (soon four) instead of one data center. Just looking at how the major statistics have changed, we now have over 100,000 hard drives in our data centers instead of the 41,000 mentioned in the post video. A lot has changed in the four years since Brian Beach wrote a post announcing Backblaze Vaults, our software architecture for cloud data storage.
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