What does it mean that Delta Lake supports multi-cluster writes?Delta Lake prevents data corruption when multiple clusters write to the same table concurrently. Some write operations can conflict during simultaneous execution, but don’t corrupt the table. See Isolation levels and write conflicts on...
Buying an item might mean that while the user orders a “single” thing, this results in three different items being pulled from internal inventory. The first two might not be a problem, but if the third is out of stock the entire transaction must fail and be rolled back. Atomicity ...
Isolationis the I in ACID, and it describes how a database protects an application from concurrency problems (race conditions). If you read a traditionaldatabase theory textbook, it will tell you that isolation is supposed to meanserializability, i.e. you can pretend that transactions are execu...
Internal technical errors are caused by flying or shorn writes, which are writes that are written to the wrong location, or truncated (shorn) thanks to power loss. The term unserializability means that writes are recorded in the wrong order. Firmware is also to blame for some SSD reliabilit...
If you read a traditional database theory textbook, it will tell you that isolation is supposed to mean serializability, i.e. you can pretend that transactions are executed one after another, and concurrency problems do not happen. However, if you look at the implementations of isolation in ...
What does it mean that Delta Lake supports multi-cluster writes?Delta Lake prevents data corruption when multiple clusters write to the same table concurrently. Some write operations can conflict during simultaneous execution, but don’t corrupt the table. See Isolation levels and write conflicts on...