- Transaction T issues read_item(X)
- TO algorithm compares TS(T) with Write_TS(X)
- Ensures transaction order execution not violated
- If successful,Write_TS(X) <= TS(T)
- Read_TS(X) = MAXTS(T), current Read_TS(X)
- If fail,Write_TS(X) > TS(T)
- T aborted, rolled-back and resubmitted with new TS
- Cascading rollback
In Focus
4.2.09. Timestamping