Scalability
2 guides tagged “Scalability”.
- What Is Sharding? Sharding splits one large dataset across several databases so no single machine has to hold it all. It is a last resort, and the shard key is the decision you live with.
- What Is a Read Replica? A read replica is a copy of your database that follows the primary. It scales reads, and it introduces replication lag — which is a correctness problem, not just a delay.