Caching data in recoverable objects

Details Caching data in recoverable objects Caching data in recoverable objects

1997-01-21

1998-11-03

Amsbury, Wayne

Data processing: database and file management or data structures

Database design

Data structure types

G06F 1730

Patent

active

058325166

ABSTRACT:
A method and apparatus for recovering an object that includes logged data and a set of non-logged data is provided. According to the method, a copy of the object resides in volatile memory. A change is made to the copy of the object. If the change does not change any data within the object other than the non-logged data, then the change is made to the copy of the object without generating redo information. If the change changes any data within the object other than the non-logged data, then redo information is generated in response to the change. The redo information is stored on non-volatile storage. After a failure, the redo information is used to restore all data within the object other than the non-logged data. The non-logged data may be restored by retrieving the non-logged data from a different object for which redo information was generated for the non-logged data. A description of how this technique may be used to efficiently perform selective non-deferred block cleanout is also provided.

REFERENCES:
patent: 5278982 (1994-01-01), Daniels et al.
patent: 5287501 (1994-02-01), Lomet
patent: 5440727 (1995-08-01), Bhide et al.
patent: 5455944 (1995-10-01), Haderle et al.
patent: 5465328 (1995-11-01), Dievendorff et al.
patent: 5481699 (1996-01-01), Saether
patent: 5499367 (1996-03-01), Bamford et al.
patent: 5581750 (1996-12-01), Haderle et al.
patent: 5640561 (1997-06-01), Satoh et al.

Affiliated with

Also associated with

Rating

Caching data in recoverable objects does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Caching data in recoverable objects, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Caching data in recoverable objects will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-704395