Note that RRS is "Reduced Redundancy Storage" - an S3 option that offers 99.99% durability, as opposed to the 99.999999999% durability offered by Standard S3.

It's staggering that out of 2 trillion only 20 might be corrupted, assuming they lived up to their SLA.

2000000000000 - (.99999999999 * 2000000000000) = 20

Makes me feel pretty OK about having backups there.

Do objects tend to get lost in clusters, or what?