| Level | Phenomenon prevented | |--------|----------------------| | Read Uncommitted | – (dirty reads possible) | | Read Committed | Dirty reads | | Repeatable Read | Non-repeatable reads | | Serializable | Phantom reads + all above |
Test failover regularly. Simulate network partitions. Know your recovery time objective (RTO). fundamentals of database engineering by hussein nasser
A central theme of Nasser's teaching is the . He emphasizes that a database engineer must respect the performance hierarchy of hardware: fundamentals of database engineering by hussein nasser