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by pageald 2877 days ago
In my experience using AWS, you can spin up new autoscaled instances pretty quickly. I don't even have a custom AMI, I use a generic image and run startup scripts to kick off my server software. Takes < 3 minutes to spin up a new one and start accepting requests.

If that's not fast enough, you can bake an AMI and scale more proactively (e.g. scale when your server is 70% utilized rather than 95%)