Method and apparatus for processing a synchronizing marker for an asynchronous remote data copy
US5623599A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 29, 1994 |
| Grant date | Apr 22, 1997 |
| Priority date | — |
| Expiry date | Jul 29, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2064
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.