§2023-08-07

• Sharding In MongoDB

Data Distribution

• Shard Key

  • MongoDB shards at the collection level. You choose which collection(s) you want to shard. MongoDB uses the shard key to distribute a collection’s documents across shards. MongoDB splits the data into “chunks”, by dividing the span of shard key values into non-overlapping ranges. MongoDB then attempts to distribute those chunks evenly among the shards in the cluster.

• Sharding Strategy

  • MongoDB supports two sharding strategies for distributing data across sharded clusters:
    • Ranged Sharding
    • Hashed Sharding