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. 08, 2016
Filed:
Mar. 15, 2013
Emc Corporation, Hopkinton, MA (US);
Kumar Kanteti, South Grafton, MA (US);
William Davenport, Burlington, MA (US);
Philippe Armangau, Acton, MA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
A method and a system to dynamically determine how much of the total IO bandwidth may be used for flushing dirty metadata from the cache to the main memory without increasing the host memory access latency time, includes increasing the number of IO processes by adding a number of IO processes at short intervals and measuring host latency. If the host latency is acceptable, then increasing the number of IO processes again by the same number, and repeating until the host latency period reaches a limit. When the limit has been reached, reducing the number of IO processes by a multiplicative factor, and repeating the additive process from the reduced number of IO processes. The number of IO processes used for flushing dirty metadata may resemble a series of saw teeth, rising gradually and declining rapidly in response to the number of host IO processes needed.