The zero group will always be a single group. Only Alphas with sharding will have more subgroups in the RAFT algo logic. You don’t need 9 Zeros. That is too much. You can have 1 Zero per Data center. As long it is an odd number. Pay attention that all your Alphas will talk only to the Zero leader. So it should be close related to everyone at least. You can’t have the Zero leader in China for example and the Alphas trying to reach it out from us-east.
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