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:
Feb. 21, 2017
Filed:
Mar. 14, 2013
Oracle International Corporation, Redwood Shores, CA (US);
Wei Zhang, Foster City, CA (US);
Sujatha Muthulingam, Sunnyvale, CA (US);
Amit Ganesh, San Jose, CA (US);
Oracle International Corporation, Redwood Shores, CA (US);
Abstract
A method, apparatus, and system for hierarchical organization of tablespace free space metadata in a database are provided. The hierarchy is divided into at least two levels: levelor Lbitmap blocks are stored as a shared data structure and map free space in a tablespace, whereas levelor Lbitmap blocks are stored as separate local copies at each database instance and map to the Lbitmap blocks. This hierarchical organization provides a mechanism for finer grained concurrency control, enabling highly parallel tablespace metadata processing to accommodate the performance requirements of large tablespaces with big data sets. By integrating the hierarchical organization as part of the tablespace stack layer in a database management system (DBMS), implementations can be provided transparently to database end users without demanding any additional administrative, maintenance, or development burdens.