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Posted on 4 years ago by Christophe LimpalairChristophe Limpalair

How can you protect important assets and data when using Amazon S3? A feature called versioning works as an excellent answer to this question. By default when you upload an object to S3, that object is redundantly stored to provide 99.999999999% durability. This means that for 10,000 objects stored on S3, you can expect the loss of a single object once very 10,000,000 years (on average). Those are some pretty good odds, so why do we even need to answer this question? Because while the underlying infrastructure powering S3 provides serious durability, it does not protect you from overwriting your objects or even deleting those objects. Or does it? Not by default, but it does if we enable versioning.