Methods and apparatus for managing state identifiers for efficient recovery

A data processing system maintains logs for system and media recovery. The logs contain state identifiers each uniquely identifying the state of a corresponding section of a storage medium, such as a disk. The state identifiers are assigned after changes have been made such that they can be determin...

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Bibliographic Details
Main Authors LOMET, DAVID B, JOSHI, ASHOK M, SPIRO, PETER M, RAGHAVAN, ANANTH, RENGARAJAN, TIRUMANJANAM K
Format Patent
LanguageEnglish
French
German
Published 08.01.1992
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:A data processing system maintains logs for system and media recovery. The logs contain state identifiers each uniquely identifying the state of a corresponding section of a storage medium, such as a disk. The state identifiers are assigned after changes have been made such that they can be determined from the information in the logs. One implementation involves assigning state identifiers in a known sequence, such as in a monotonically increasing sequence of integers beginning with zero.
Bibliography:Application Number: EP19910305229