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I don't think many people are intentionally deploying their apps with replicas of different sizes, you're right. But this is it: noisy neighbours, inherent phy
by samwho 4y ago
I don't think many people are intentionally deploying their apps with replicas of different sizes, you're right.
But this is it: noisy neighbours, inherent physical differences in even identical hardware, using different node sizes in your clusters. I think incidental differences in servers are very common, even within the same AWS instance category.
- mnutt 4y agoI thought of another variant: with AWS autoscaling groups using spot instances you can list a number of different instance sizes and say "give me whatever is cheapest" and you'll often get a mix.