Twin-page storage management for rapid transaction-undo recoveryThis paper presents and evaluates a new twin-page disk-storage management scheme for rapid database transaction-undo recovery. In contrast to previous twin-page schemes, the present approach uses static page mapping and allows dirty pages in the main memory to be written, at any instant, onto disk without the requirement of undo logging. No explicit undo is required when a transaction is aborted. Transaction undo is implicitly performed by not subsequently fetching from disk the invalid pages updated by the aborted transaction. Performance in terms of disk I/O and CPU overhead for transaction-undo recovery is analyzed and compared with a previous approach TWIST. It is shown that the scheme achieves rapid transaction-undo recovery without degrading average system performance for various workloads, and that the scheme is well suited for applications with a large number of updates and frequent transaction aborts.
Document ID
19910035168
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Wu, Kun-Lung (IBM Thomas J. Watson Research Center Yorktown Heights, NY, United States)
Fuchs, W. Kent (Illinois, University Urbana, United States)