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. 29, 2021
Filed:
Apr. 30, 2019
Emc Ip Holding Company Llc, Hopkinton, MA (US);
Dmitry Tylik, Westborough, MA (US);
Matthew H. Long, Uxbridge, MA (US);
Jean M. Schiff, Bolton, MA (US);
Yuri A. Stotski, Saint Petersburg, RU;
Anil K. Koluguri, Raleigh, NC (US);
EMC IP Holding Company LLC, Hopkinton, MA (US);
Abstract
At the start of an I/O cutover process that changes host computer access to a logical volume from a source data storage appliance to a destination data storage appliance, and during which processing of host I/O operations directed to the logical volume is frozen, at least one I/O freeze timer is set. In response to expiration of the I/O freeze timer, and prior to completion of the I/O cutover process, processing of host I/O operations directed to the logical volume is resumed.