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:
Apr. 07, 2020
Filed:
Dec. 30, 2016
Emc Ip Holding Company Llc, Hopkinton, MA (US);
Philippe Armangau, Acton, MA (US);
Feng Zhang, Shanghai, CN;
Xianlong Liu, Shanghai, CN;
Chang Yong Yu, Shanghai, CN;
Ruiling Dou, Shanghai, CN;
EMC IP Holding Company LLC, Hopkinton, MA (US);
Abstract
A technique for performing storage tiering accesses allocation metadata in a data storage system and applies that allocation metadata when relocating data from a selected extent to a target extent. The selected extent includes a range of contiguous blocks. The allocation metadata may designate each of these blocks as either allocated or free. When relocating data from the selected extent to the target extent, the technique copies data of the selected extent on a per-block basis, checking whether that block is allocated or free before copying it to the target extent.