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MongoDB allows administrators to direct the balancing policy using ______ aware sharding.

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MongoDB allows administrators to direct the balancing policy using ______ aware sharding.

(a) tag

(b) replica

(c) rack

(d) all of the mentioned

This question was posed to me by my college director while I was bunking the class.

The doubt is from Cluster Architectures in chapter Sharding Concepts, Mechanics and Sharded Cluster of MongoDB

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The correct option is (c) rack

To elaborate: Administrators create and associate tags with ranges of the shard key, and then assign those tags to the shards.

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