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:
Mar. 23, 2010
Filed:
Feb. 26, 2007
Bishwaranjan Bhattacharjee, Yorktown Heights, NY (US);
Timothy Ray Malkemus, Leander, TX (US);
Sean W. Mckeough, Markham, CA;
Jo-anne Mona Louise Kirton, Toronto, CA;
Sherman Lau, Markham, CA;
Bishwaranjan Bhattacharjee, Yorktown Heights, NY (US);
Timothy Ray Malkemus, Leander, TX (US);
Sean W. McKeough, Markham, CA;
Jo-anne Mona Louise Kirton, Toronto, CA;
Sherman Lau, Markham, CA;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and system utilizes a hierarchical bitmap structure to represent deleted data sets. Each level in the hierarchical bitmap structure may have progressively larger size and represent finer granularity of number of data blocks than its parent level. A method in one aspect may comprise allocating a first level bitmap having size equal to a register on a processor, each bit in the first level bitmap representing a plurality of blocks of data in a database, and allocating one or more pointers corresponding to said plurality of bits in the first level bitmap, said one or more pointers being allocated to point to a sub bitmap generated after a data block is deleted but before the index corresponding to the data block is cleaned.