A special redo-only log record is written to the log, where V1 is the value being restored to data item Xj during the rollback. These log records are sometimes called
A. Log records
B. Records
C. Compensation log records
D. Compensation redo records
Answer:A
A special redo-only log record is written to the log, where V1 is the value being restored to data item Xj during the rollback. These log records are sometimes called
A. Log records B. Records C. Compensation log records D. Compensation redo records
Explanation: Such records do not need undo information, since we never need to undo such an undo operation.