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For multi-IDC deployment, we once considered to use regions, and I think 
it's a good solution, though we didn't use swift finally due to some 
reasons.


On 02/12/2014 07:38 AM, Adam Lawson wrote:
> For those who are scaling to that degree, are you building multiple
> unique clusters and replicating between them somehow or using regions
> and replicating within essentially one giant cluster and using affinity
> rules like read_affinity and write_affinity*?