Consistency
3 engineering logs on Consistency. Newest first.
- The replica lag you do not measure is the one serving checkout
Why byte lag reads zero on a broken replica, how read-your-writes breaks the moment you add a read replica, and why routing all reads to replicas is a correctness decision rather than a scaling one.
- Clock synchronization is a nightmare: Why Spanner uses TrueTime and the rest of us suffer
Why relying on system clocks causes silent data corruption and how TrueTime solves it for Spanner.
- Consistency Models in Azure Cosmos DB: From Strong to Eventual
How Azure Cosmos DB's five consistency levels map onto PACELC tradeoffs, what each level guarantees, and how to choose the right consistency for your workload.