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A comment on Amazon cloud outage takes down Netflix, Instagram, Pinterest, & more. Parent comment

Re:Amazon cloud outage takes down Netflix, Instagram, Pinter... by tansey on Saturday June 30, 2012 @01:47AM (#4180833)
Heroku doesn't. They are on US-East.
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Re:Amazon cloud outage takes down Netflix, Instagram, Pinter... by rdl on Saturday June 30, 2012 @02:26AM (#4180914)
Heroku is single-AZ within US-East, not even multiple-AZ.
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Re:Amazon cloud outage takes down Netflix, Instagram, Pinter... by asenchi on Saturday June 30, 2012 @05:16AM (#4181180)
Sorry but that is not even remotely true. We are hosted across all availability zones in the US-EAST region.
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Re:Amazon cloud outage takes down Netflix, Instagram, Pinter... by rdl on Saturday June 30, 2012 @05:39AM (#4181218)
Ah, I didn't know that. Sorry. (I don't remember where I heard about single-AZ but it seemed consistent with observation)

Is Heroku resilient against single-AZ failure (so only some subset of customers go down, and then it restarts), or is it exposed so that if any AZ goes down, core stuff also goes down? The sites I care about on Heroku seem to go down whenever any US-East badness happens at all, even if it is "limited to a single AZ" per Amazon.

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