US PATENT SUBCLASS 711 / 141
.~.~.~ Coherency

Current as of: June, 1999
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711 /   HD   ELECTRICAL COMPUTERS AND DIGITAL PROCESSING SYSTEMS: MEMORY

100  DF  STORAGE ACCESSING AND CONTROL {6}
117  DF  .~ Hierarchical memories {1}
118  DF  .~.~ Caching {14}
141.~.~.~ Coherency {5}
142  DF  .~.~.~.~> Write-through
143  DF  .~.~.~.~> Write-back
144  DF  .~.~.~.~> Cache status data bit
145  DF  .~.~.~.~> Access control bit
146  DF  .~.~.~.~> Snooping

DEFINITION

Classification: 711/141

Coherency:

(under subclass 118) Subject matter further comprising means or steps not specifically covered above for assuring that the data stored in the cache memory and those of the main memory are either identical or controlled so that stale and current data are not confused with each other.

(1) Note. The subject matter in this subclass is also called cache consistency or cache currency in the art.

SEE OR SEARCH THIS CLASS, SUBCLASS:

161+, for various reliability methods under accessing and control allowed by the (6) Note for subclass 100 above, such as archiving and backup.

SEE OR SEARCH CLASS

707, Data Processing: Database and File Management, Data Structures, or Document Processing,

200+, for file and database maintenance systems including data coherency in database or file systems and subclasses 530+ for developing or changing a document wherein one or more elements of document are added, deleted, or modified, or including means or steps for storing the resultant altered document or the alterations. 714, Error Detection/Correction and Fault Detection/Recovery,

1+, for reliability and availability in digital data processing systems, per se, including subclasses 5+ for memory or peripheral subsystem affected fault recovery.