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:
Sep. 27, 2016
Filed:
Sep. 25, 2015
International Business Machines Corporation, Armonk, NY (US);
Leo S. Luan, Saratoga, CA;
Frank B. Schmuck, Campbell, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Embodiments relate to granular management of data storage blocks in a data storage system. In one aspect, status values are employed to track 'used', 'free', and “claimed free” storage blocks. A storage block having stored data is identified as used, a storage block available to store data is identified as free, and a storage block having previously stored data removed that has not been reclaimed is identified as claimed free. These values are maintained on a map to track each data block within the data storage system. One or more used blocks are de-allocated, which includes changing the status value of each used block to claimed free Available claimed free data blocks are prioritized for data block allocation over available free data blocks for efficient storage, including enabling efficient reclamation of data blocks and minimizing data movement needed for reclamation-oriented de-fragmentation.