Logging Visualizer

Step through the transaction and watch memor and disk changes live. Select logging method, crash the system any time during the transaction and see how recovery works.

Definition

Transaction timeline

Execution steps

Runtime state

Memory, disk, and log

Memory

A
B
t

Disk

A
B

Log on disk

Recovery

Crash analysis

Press Crash system at any time to trigger recovery from the current disk state.
In the simulator, I uses the example from book, one transaction (T) that doubles A and B.
Developed by Ali Amir