[AusNOG] Telstra Network Down

Mark Newton newton at atdot.dotat.org
Thu Feb 2 16:16:56 EST 2017

> On Feb 2, 2017, at 3:35 PM, Mark Delany <g2x at juliet.emu.st> wrote:

> But for intolerant systems like banking, co-ordinating consistent
> updates across a federation of systems is a tough problem. This is why
> banks will pay for a 100% infrastructure redundancy to avoid
> complexity and facebook will pay for 11% redundancy to avoid cost.
> tl;dr idle infrastructure may not be your biggest cost.

Paxos handles the exact situation at issue: transactional integrity in the face of a network partition when nodes can autonomously recover from failures in inconsistent states.
https://www.quora.com/Distributed-Systems-What-is-a-simple-explanation-of-the-Paxos-algorithm <https://www.quora.com/Distributed-Systems-What-is-a-simple-explanation-of-the-Paxos-algorithm>

It also isn’t particularly performant, especially if there’s a lot of RTT between nodes. But there are ways around that too.

  - mark

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