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:
May. 26, 2009
Filed:
Mar. 21, 2002
James Leong, Hillsborough, CA (US);
Rajesh Sundaram, Mountain View, CA (US);
Douglas P. Doucette, Freeland, WA (US);
Scott Schoenthal, San Ramon, CA (US);
Stephen H. Strange, Mountain View, CA (US);
Srinivasan Viswanathan, Fremont, CA (US);
James Leong, Hillsborough, CA (US);
Rajesh Sundaram, Mountain View, CA (US);
Douglas P. Doucette, Freeland, WA (US);
Scott Schoenthal, San Ramon, CA (US);
Stephen H. Strange, Mountain View, CA (US);
Srinivasan Viswanathan, Fremont, CA (US);
NetApp, Inc., Sunnyvale, CA (US);
Abstract
The present invention implements an I/O task architecture in which an I/O task requested by the storage manager, for example a stripe write, is decomposed into a number of lower-level asynchronous I/O tasks that can be scheduled independently. Resources needed by these lower-level I/O tasks are dynamically assigned, on an as-needed basis, to balance the load and use resources efficiently, achieving higher scalability. A hierarchical order is assigned to the I/O tasks to ensure that there is a forward progression of the higher-level I/O task and to ensure that resources do not become deadlocked.