Hi, I'm thinking about using 2i for a certain piece of my system, but I'm worried that the document-based partitioning may make it suboptimal.
The issue is that the secondary fields I want to query over (email and username) are unique, so each will only ever map to one value. Since 2i queries a coverage set, but I'm only ever looking for one result, it's going to be hitting n-1 machines needlessly. So, what I'm looking to understand is how much overhead a single-result 2i lookup like this will incur vs. a primary-key lookup, or even vs. search. Search doesn't intuitively feel like the right tool here, but I wonder if it may actually be preferable since it uses term-based partitioning. Thanks, -- Greg Clipboard
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