3 ms·
This is a terrible article. EBS can fail. The article even has a screenshot where Amazon is clear about the reliability ratings. If you want durable storage, S3
by skywhopper 7y ago
This is a terrible article. EBS can fail. The article even has a screenshot where Amazon is clear about the reliability ratings. If you want durable storage, S3 is the best option. Replicate it across regions for even more protection.
EBS is for storage volumes attached to virtual machines. There are many many use cases in which a slightly higher failure rate is absolutely fine and for which the lower cost and higher performance of EBS are the more desirable tradeoff. But again, it’s clearly stated in all the docs that EBS has a 0.1% annual failure rate. There are trivially easy tools built in to AWS to enable backups of EBS volumes. If the data on your EBS volumes is critical, then use those tools!
- chousuke 7y agoIs that 0.1% for non-snapshotted data? I'm under the impression that if you snapshot your data, EBS can recover some failures from the S3-backed snapshot transparently, increasing durability. I obviously don't know the technical details, but it seems plausible to me that with a proper implementation snapshots could provide additional durability by reducing the amount of low-redundancy data that is "in danger" during disk failure recovery.