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:
Nov. 29, 2016
Filed:
Dec. 30, 2013
Emc Corporation, Hopkinton, MA (US);
Bingfeng Zhao, Beijing, CN;
Jun Chen, Framingham, MA (US);
Stephen M. Lathrop, Milford, MA (US);
Wai Chuen Yim, Merrimack, NH (US);
Yongmei Xie, Beijing, CN;
EMC IP Holding Company LLC, Hopkinton, MA (US);
Abstract
A technique for logging events in a data storage system involves designating one subset of storage processors of the data storage system as clients that generate log entries and another subset of the storage processors as servers that receive log entries. Only one server is active at a time. The active server receives the generated log entries from the clients and persists the log entries to a centralized log store. Clients assign first timestamps to the log entries based on locally accessible clocks. The active server receives the log entries, including the first timestamps, from the clients and applies second timestamps based on a clock accessible to the server. As the second timestamps are consistent across the different clients, the second timestamps can be applied to correct misalignments in time among the log entries received from the clients.