Database Replication

Keeping synchronized copies of data across multiple database servers for high availability and read scalability.

#replication#primary replica#high availability#read scaling

Field Note - Real-world Analogy

Think of it like this

“Like a legal contract with carbon copies. The original (primary) is the authoritative version. Carbon copies (replicas) are identical and immediately available for reference. If the original is destroyed, you still have the copies. Many people can read copies simultaneously without bothering the person who holds the original.”

Field Observations - Key Topics Covered

The primary motivation for replication is high availability: if your single database server goes down, your entire application goes down. With replication, you have standby replicas that can take over immediately if the primary fails.

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