New blog post: Stop using ridiculously low DNS TTLs, now https://00f.net/2019/11/03/stop-using-low-dns-ttls/ …
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DNS-based load balancing relies on multi-value DNS records. If an endpoint fails the client can try the next value in the record without having to do another query. As long as the clients are quick at doing this, having dead endpoints in the record is not much of a problem.
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It increases the time before a replacement can receive traffic though.
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