ARIES in database management system free notes download
The major differences between ARIES and our advanced recovery algorithm are that ARIES:
1. Uses a log sequence number (LSN) to identify log records, and the use of LSNs in database pages to identify which operations have been applied to a
2. Supports physiological redo operations, which are physical in that the affected page is physically identified, but can be logical within the page. For instance, the deletion of a record from a page may result in many other records in the page being shifted, if a slotted page structure is used.With physical redo logging, all bytes of the page affected by the shifting of records must be logged. With physiological logging, the deletion operation can be logged, resulting in a much smaller log record. Redo of the deletion operation would delete the record and shift other records as required.