Aurora I/O optimized config saved 90% DB cost

Re:Aurora I/O optimized config saved 90% DB cost by Szpadel on Thursday August 10, 2023 @04:58PM (#37081700)

Explanation makes sense, except cross availability zone traffic is also expensive and by this logic it should not be.

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Re:Aurora I/O optimized config saved 90% DB cost by twoodfin on Thursday August 10, 2023 @05:12PM (#37081866)

It’s presumably expensive because there’s a lot less inter-AZ bandwidth than there is intra-AZ bandwidth for the obvious reasons.

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Re:Aurora I/O optimized config saved 90% DB cost by Szpadel on Friday August 11, 2023 @09:15AM (#37088337)

But if that's the case, this could be the reason of egress cost. I mean egress cannot be cheaper for aws than cross az. So if we assume that this is just expensive then we should assume the same for egress

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Re:Aurora I/O optimized config saved 90% DB cost by hughesjj on Thursday August 10, 2023 @05:44PM (#37082186)

IIRC some cross az traffic uses vendors' fiber (albeit definitely encrypted) but I could be completely wrong.

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