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  • Pasha Craydon thinks this is interesting:

Let’s consider the situation pictured in Figure 2-4 again, where Shard 1 and Shard 2 have 500GB and Shard 3 and Shard 4 have 300GB. This time, we’ll allow each shard to contain multiple chunk ranges.

This allows us to divide Shard 1’s data into two ranges: one of 400GB (say ["a”, “d”)) and one of 100GB (["d”, “f”))...

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Cover of Scaling MongoDB

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