Transfer of event logs for replication of executing programs
US8984513B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2007 |
| Grant date | Mar 17, 2015 |
| Priority date | — |
| Expiry date | Jun 30, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2048
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A mechanism for replicating programs executing on a computer system having a first storage means is provided. The mechanism identifies the events corresponding to requests from one executing program, which may be different from the executing program to be replicated, which are non-deterministic and identifies the ‘Non Abortable Events’ (NAE's), which change irremediably the state of the external world that need to be reproduced in the replay of the programs. These events are immediately transferred for replay and the executing program is blocked until the transfer is acknowledged. For the other non-deterministic events, they are logged and sent to the executing program, the executing programs remaining blocked only if the log is full and/or if a timer between two NAEs expires, in this case a log transfer to the standby machine is performed to prepare replication before unblocking of the executing program.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.