What is Replication?
Copying data from one database server to others so multiple servers have the same information.
Why It Matters
Replication improves reliability by having backup copies and improves speed by allowing reads from multiple servers.
Real-World Example
A primary database in Sydney replicates to a secondary in Melbourne, so if Sydney goes down, Melbourne takes over.
“Understanding terms like Replication matters because it helps you have better conversations with developers and make smarter decisions about your software. You do not need to be technical. You just need to know enough to ask the right questions.”
Related Terms
Sharding
Splitting a large database across multiple servers so each one holds a portion of the data.
Database
An organised collection of data that your application can store, retrieve, and update
Disaster Recovery
Plans and systems for restoring operations after major failures
Backup
A copy of your data stored separately in case the original is lost or corrupted
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Related Terms
Database
An organised collection of data that your application can store, retrieve, and update
Backup
A copy of your data stored separately in case the original is lost or corrupted
Disaster Recovery
Plans and systems for restoring operations after major failures
Sharding
Splitting a large database across multiple servers so each one holds a portion of the data.
SQL
A language for communicating with databases, used to create, read, update, and delete data
NoSQL
Databases that store data differently from traditional tables, often as flexible documents or key-value pairs