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US Patent 5644701 - Data processing system and method for executing snapshot dumps
US Patent Issued on July 1, 1997
Estimated Patent Expiration Date:
December 28, 2014Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
December 28, 2014Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractAt the time of a snapshot dump, a main memory storage unit stores only the memory contents of the dirty ones whose contents have changed of the pages in the main memory after the execution of the preceding snapshot dump. Data indicating the storage location of the contents of the pages stored at that time is stored in a storage device in pages in the form of a storage location list. Furthermore, data indicating the storage location of page contents is stored in a storage location list storage area each time a snapshot dump is executed. When the memory contents of a given snapshot dump are restored, the corresponding location list is taken out from the storage location list storage area. According to the storage location list, the corresponding memory contents are restored into the original page location in the main memory.Other References
| InventorApplicationNo. 365545 filed on 12/28/1994US Classes:714/20, Plural recovery data sets containing set interrelation data (e.g., time values or log record numbers)711/144Cache status data bitExaminersPrimary: Beausoliel, Robert W. Jr.Assistant: Palys, Joseph E. Attorney, Agent or FirmUS Patent References4665520, Optimistic recovery in a distributed processing systemIssued on: 05/12/1987 Inventor: Strom , et al.4819154, Memory back up system with one cache memory and two physically separated main memories Issued on: 04/04/1989 Inventor: Stiffler , et al.5065311, Distributed data base system of composite subsystem type, and method fault recovery for the system Issued on: 11/12/1991 Inventor: Masai, et al.5280611, Method for managing database recovery from failure of a shared store in a system including a plurality of transaction-based systems of the write-ahead logging type Issued on: 01/18/1994 Inventor: Mohan, et al.5369757, Recovery logging in the presence of snapshot files by ordering of buffer pool flushing Issued on: 11/29/1994 Inventor: Spiro, et al.5404504, Trace tool for serial, optical interface Issued on: 04/04/1995 Inventor: Byers, et al.5454099, CPU implemented method for backing up modified data sets in non-volatile store for recovery in the event of CPU failure Issued on: 09/26/1995 Inventor: Myers, et al.5455946, Method and means for archiving modifiable pages in a log based transaction management system Issued on: 10/03/1995 Inventor: Mohan, et al.5485608Methods and apparatus for updating information in a computer system using logs and state identifiers Issued on: 01/16/1996 Inventor: Lomet, et al. Foreign Patent References
International ClassG06F 001/00Foreign Application Priority Data1993-12-29 JP |
