Partition Key

Definitions

1. The column or attribute whose value determines which partition a given row or record is assigned to, via a hash or range function. Choosing a good partition key is critical to avoiding hot spots and ensuring even data distribution across nodes.

   In plain English: The piece of data that decides which bucket a record goes into when a database splits its data across multiple storage locations.

   Example: "We switched the partition key from country code to user ID because three countries were creating massive hot partitions."

Related Terms

• query planner
• normalization
• connection pool
• graph database
• Isolation Level
• Redis Cluster
• Row-Level Security
• Transaction Log