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:
Apr. 22, 1997
Filed:
Jul. 29, 1994
Robert W Shomler, Morgan Hill, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
The present invention relates to event synchronization in asynchronous remote data duplexing, the synchronization being non-disruptive to application execution at a host device and to data copying at a remote site. The event sequence is characterized by embedding labeled tokens of write operations including addresses and periodic checkpoint lists there establishing a total ordering. Event synchronization is achieved by embedding at the host a synchronization request having a higher sequence number than that of some prior predetermined event and generating a responsive synchronization reply from the remote site to the host. The present invention finds use in the communication and remote duplex recording of financial events such as the rare event transfer of large monetary sums in a population of transfers of small sums.