You cannot do graceful failovers with Route 53. This is, because DNS is a system... | Hacker News

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sspies on Jan 29, 2015 | parent | context | favorite | on: Datapath.io: Provider-Independent Elastic IP Addre...

You cannot do graceful failovers with Route 53. This is, because DNS is a system of many dependend caching layers and the TTL value is not realiable.

moe on Jan 29, 2015 | [–]

the TTL value is not realiable.

How is the TTL not reliable?

In my personal experience DNS cut-overs have never been a problem. Is there any major OS or ISP doing DNS wrong?

sspies on Jan 29, 2015 | | [–]

We have seen providers set the TTL value to 300 seconds no matter what. Chrome has been caching names forever while running...just two examples

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