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One thing to keep in mind is that Backblaze keeps 1.15 copies of your data, while Amazon S3 and the like keep multiple full geographically redundant copies of y
by benjaminl 11y ago
One thing to keep in mind is that Backblaze keeps 1.15 copies of your data, while Amazon S3 and the like keep multiple full geographically redundant copies of your data. For example Microsoft Azure Cloud Storage keeps 3 to 6 copies of your data, depending on the tier, [1] when you compare that to the 1.15 copies in Backblaze B2 you start to understand where the pricing difference comes from.
For most use cases this doesn't matter and the price saving are well worth the reduced redundancy, but Backblaze B2 isn't well suited for being the canonical store of your data.
[1] - https://azure.microsoft.com/en-us/pricing/details/storage/ https://azure.microsoft.com/en-us/pricing/details/storage/
- basch 11y agogiven block level dedupe, Microsoft might have 6 copies of your data, but that block is shared between 50 users in each region. Adding a 51st person calling on that block costs nothing.
- PhantomGremlin 11y agofull geographically redundant copies of your data In the case of Amazon, I wouldn't be so certain that they're geographically redundant copies. I raised this issue on HN a few months ago and someone replied that within an availability zone the data is "a bunch of (datacenters) that are close to each other". https://news.ycombinator.com/item?id=10231677 https://news.ycombinator.com/item?id=10231677 I like how for GRS Microsoft specifically says "a second datacenter hundreds of miles away". I have yet to find such clear statements from Amazon.
- Spooky23 11y agoAmazon plays games with terms like "durability", meaning that the data exists. That doesn't mean that it is accessible by you or available in its entirety. Microsoft is definitely more straightforward in its claims. O365 for my org was in Midwest, midatlantic, and southwest, giving us a really good continuity story.
- Twirrim 11y agoAround about here in the talk: https://youtu.be/JIQETrFC_SQ?t=14m38s https://youtu.be/JIQETrFC_SQ?t=14m38s James Hamilton talks precisely what the definitions of AZs and regions are :)