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> There are at least three independent paths (N+2 redundancy) between any two locations on the Google network, helping ensure that traffic continues to flow bet
by heroic 9y ago
> There are at least three independent paths (N+2 redundancy) between any two locations on the Google network, helping ensure that traffic continues to flow between these two locations even in the event of a disruption. As a result, with Premium Tier, your traffic is unaffected by a single fiber cut. In many situations, traffic can flow to and from your application without interruption even with two simultaneous fiber cuts.
What does this mean? N+2 redundancy should mean, that even if both go down, then service will not be affected at all, no?
- hamax 9y agoN+2 usually means one redundancy for normal operations (deploys, maintenance) and one for disruptions. If the disruption happens while there is an ongoing maintenance, you'll be resilient for one event only.
- ucaetano 9y agoTwo fiber cuts in a N+2 network could overload the last remaining path, resulting in some impact on service.
- hamax 9y agoI think this would (or should) be called N+1. Edit: but you're right, this might be what they mean.
- yegle 9y agoI think "unaffected" means "even with a single fiber cut, the connection still have sufficient redundancy". With N+1 redundancy, if there's a fiber cut, I won't call the remaining connection "unaffected", since it's no longer fail-safe.