ebs claridade de durabilidade

Question

Estou confuso quanto à durabilidade dos volumes do EBS na AWS.

As an example, volumes that operate with 20 GB or less of modified data since their most recent Amazon EBS snapshot can expect an annual failure rate (AFR) of between 0.1% – 0.5%, where failure refers to a complete loss of the volume. This compares with commodity hard disks that will typically fail with an AFR of around 4%, making EBS volumes 10 times more reliable than typical commodity disk drives.

Because Amazon EBS servers are replicated within a single Availability Zone, mirroring data across multiple Amazon EBS volumes in the same Availability Zone will not significantly improve volume durability.

Isso significa que a probabilidade de falha 1 / 200-1 / 1000 é antes da replicação automática ou depois?

    

Answer 1

As an example, volumes that operate with 20 GB or less of modified data since their most recent Amazon EBS snapshot can expect an annual failure rate (AFR) of between 0.1% – 0.5%, where failure refers to a complete loss of the volume.

A AFR citada refere-se à experiência de ponta a ponta de usar um volume EBS. A replicação do EBS é completamente transparente para você e você nem saberá quando uma das réplicas falhar e será substituída automaticamente.