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:
Aug. 21, 2012
Filed:
Dec. 08, 2010
Shay Harel, Marlborough, MA (US);
Peter Puhov, Shrewsbury, MA (US);
Shay Harel, Marlborough, MA (US);
Peter Puhov, Shrewsbury, MA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
Described are techniques for performing I/O operations. A graph is received including a plurality of nodes and edges. The graph includes a first level with a root node and one or more other levels of nodes. Each edge has a value indicating an I/O load metric. A thread associated with a first node determines whether to perform a background I/O operation directed to a first device and having a first priority. The first priority is compared to a first value of an I/O load metric. The first value is determined in accordance with criteria including a maximum usage of an I/O buffer of the first device and priorities of other I/O operations directed to the first device. If it is determined that the background I/O operation is to be performed, the background I/O operation is forwarded for processing on an I/O path having a corresponding path in the graph.