Pick one and press Start, then click Next › to step through it.
Watch for
The log filling as you write, emptying at the checkpoint, then — after the crash wipes memory — the data file plus the replayed log rebuilding the exact same state.
More about this scenario
You'll learn
How a write-ahead log lets a database survive a crash without losing a single acknowledged write.
How it runs
Each write is appended to the log on disk before it touches memory. A checkpoint folds memory into the data file and truncates the log; a crash wipes only memory; recovery reloads the checkpoint and replays the log.