What are different sharding strategies?

Hashed sharding uses either a single field hashed index or a compound hashed index as the shard key to partition data across your sharded cluster.

Hashed Sharding involves computing a hash of the shard key field's value. Each chunk is then assigned a range based on the hashed shard key values.

Hashed sharding provides a more even data distribution across the sharded cluster at the cost of reducing Targeted Operations vs. Broadcast Operations.

Post-hash, documents with 'close' shard key values are unlikely to be on the same chunk or shard - the mongos is more likely to perform Broadcast Operations to fulfill a given ranged query.

Range-based sharding involves dividing data into contiguous ranges determined by the shard key values.

Each chunk is then assigned a range based on the shard key values.

In this model, documents with 'close' shard key values are likely to be in the same chunk or shard.