Re:S3 Strong Consistency
by valenterry on Wednesday December 02, 2020 @02:44AM
(#25274092)
Yes, so to quote from it [0]:
> This decoupling and targeting a specific set of faults allows our system to provide high availability and strong consistency in face of various classes of failures we see in practice.
What that says is: for the failures we have seen so far, we guarantee consistency and availability. But how about the other kind of failures? The answer is clear: strong consistency only is guaranteed for _certain expected_ errors, not in the general case. Hence generally speaking, strong consistency is _not_ guaranteed. As simple as that. Saying it is guaranteed "in practice" is, pardon, stupid wording.
> This decoupling and targeting a specific set of faults allows our system to provide high availability and strong consistency in face of various classes of failures we see in practice.
What that says is: for the failures we have seen so far, we guarantee consistency and availability. But how about the other kind of failures? The answer is clear: strong consistency only is guaranteed for _certain expected_ errors, not in the general case. Hence generally speaking, strong consistency is _not_ guaranteed. As simple as that. Saying it is guaranteed "in practice" is, pardon, stupid wording.