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:
Jun. 09, 2026
Filed:
Nov. 25, 2024
Netapp, Inc., San Jose, CA (US);
Yash Hetal Trivedi, Cary, NC (US);
Daniel Mccarthy, Erie, CO (US);
Ananthan Subramanian, San Ramon, CA (US);
William Arthur Gutknecht, Greensboro, NC (US);
Kevin Daniel Varghese, Milpitas, CA (US);
Swaroop Vikram Choudhari, San Jose, CA (US);
Abdul Basit, Morrisville, NC (US);
Christopher Clark Corey, Boulder, CO (US);
Chad Edmund Schneider, Fort Collins, CO (US);
NetApp, Inc., San Jose, CA (US);
Abstract
Techniques are provided for failing over an aggregate from one file system instance to a different file system instance of a distributed scale-out storage system. The aggregate may be stored within distributed storage that is accessible to a plurality of file system instances of the distributed scale-out storage system. When the aggregate is failed over from a first file system instance to a second file system instance, the first file system instance may still have a valid read lease that allows the first file system instance to serve client I/O, directed to the aggregate, using a cache. In order to prevent the first file system instance from serving stale data from the cache before the read lease expires, state machines and a set of control data are used to ensure that the second file system instance attaches to the aggregate only after the read lease has expired.