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:
Nov. 21, 2017
Filed:
Mar. 30, 2015
Emc Corporation, Hopkinton, MA (US);
Ronald Stuart Steinke, Tacoma, WA (US);
Dharmesh Shah, San Jose, CA (US);
EMC IP Holding Company LLC, Hopkinton, MA (US);
Abstract
Implementations are provided herein for the use of multiple threads in concurrently restriping files by maintaining multiple cursors for a single file. The cursors can be stored and tracked on disk in a mirrored data structure ('MDS') extension block also referred to as a Cursor Extension Block. During a restripe operation, individual cursors stored in the delta-block portion of the MDS extension block will be updated using delta operations of a file system. The operating system kernel can maintain an in-memory version of the delta-block portion of the MDS extension block as well. The Cursor Extension Block associated with a file can store data representing the ending logical cluster number of the cursor, the current logical cluster number of the cursor, and a current cursor count for a file.