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:
May. 09, 2017
Filed:
Sep. 10, 2015
Honeycombdata Inc., Santa Clara, CA (US);
Xiangyong Ouyang, South San Francisco, CA (US);
Jongman Yoon, San Jose, CA (US);
Sushma Devendrappa, San Jose, CA (US);
HONEYCOMBDATA INC., Santa Clara, CA (US);
Abstract
A storage device, such as a NAND flash device, includes a controller that maintains a temperature for a plurality of data blocks, the temperature calculated according to a function that increases with a number of valid data objects in the block and recency with which the valid data objects have been accessed. Blocks with the lowest temperature are selected for garbage collection. Recency for a block is determined based on a number of valid data objects stored in the block that are referenced in a hot list of a LRU list. During garbage collection, data objects that are least recently used are invalidated to reduce write amplification.