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. 14, 2017
Filed:
Jun. 29, 2015
Emc Corporation, Hopkinton, MA (US);
Diane M. Delgado, Carlisle, MA (US);
Philippe Armangau, Acton, MA (US);
EMC IP Holding Company LLC, Hopkinton, MA (US);
Abstract
A data storage system includes an internal file system writing file system data to an underlying storage volume. File system data is written as sequential data and non-sequential data, the sequential data stored in dynamically allocated windows having a predetermined number of data blocks. Operation includes stream detection that detects and identifies sequential data by (1) applying nearness detection to identify newly written data blocks as sequential data blocks located within a predetermined address range of previously data blocks, (2) for groups of written data blocks occupying respective single files, maintaining counts of the data blocks identified by the nearness detection as sequential data blocks, and (3) as additional data blocks are newly written to the groups and not identified by the nearness detection as sequential data blocks, performing overrides identifying the additional data blocks as sequential data blocks based on the counts exceeding a predetermined threshold.