The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 25, 1996
Filed:
Dec. 17, 1992
Brent C Beardsley, Tucson, AZ (US);
Susan K Candelaria, Tucson, AZ (US);
Vern J Legvold, Tucson, AZ (US);
Peter L Leung, Tucson, AZ (US);
Douglas A Martin, Tucson, AZ (US);
Gail A Spear, Tucson, AZ (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A system and technique for storing data in a cache memory in record format and in track format. Space is allocated in cache memory for the storage of data in track format. Additional space is allocated for the storage of data in record format. Data is stored in both formats. The most current data is identified and addresses are generated for each record of data. Access to individual records of data is facilitated through a track information block in which pointers are stored for the most current records whether stored in track format or record format. The track information block facilitates a rapid storage and retrieval of data in either format. In a specific implementation, data is stored in either format in cache using a scatter index table. The scatter index table and associated track directory entries are stored in a shared control array. Each track directory entry points to a track slot header in a cache. The track slot header points to an area (segment) in the cache memory in which selected data resides. The track slot header also points to a track information block associated with the selected segment. The track information block identifies the location selected records in the segment in track format or record format.