发明授权
- 专利标题: Fault tolerance and failover using active copy-cat
- 专利标题(中): 使用活动的copy-cat进行容错和故障切换
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申请号: US11502998申请日: 2006-08-11
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公开(公告)号: US07480827B2公开(公告)日: 2009-01-20
- 发明人: Paul J. Callaway , Robert Hagemann, III , Zuber Shethwala , Troy Reese , Paul Andrew Bauerschmidt , Enrico Ferrari
- 申请人: Paul J. Callaway , Robert Hagemann, III , Zuber Shethwala , Troy Reese , Paul Andrew Bauerschmidt , Enrico Ferrari
- 申请人地址: US IL Chicago
- 专利权人: Chicago Mercantile Exchange
- 当前专利权人: Chicago Mercantile Exchange
- 当前专利权人地址: US IL Chicago
- 代理机构: Brinks Hofer Gilson & Lione
- 主分类号: G06F11/00
- IPC分类号: G06F11/00 ; G06F11/14
摘要:
Fault tolerant operation is disclosed for a primary instance, such as a process, thread, application, processor, etc., using an active copy-cat instance, a.k.a. backup instance, that mirrors operations in the primary instance, but only after those operations have successfully completed in the primary instance. Fault tolerant logic monitors inputs and outputs of the primary instance and gates those inputs to the backup instance once a given input has been processed. The outputs of the backup instance are then compared with the outputs of the primary instance to ensure correct operation. The disclosed embodiments further relate to fault tolerant failover mechanism allowing the backup instance to take over for the primary instance in a fault situation wherein the primary and backup instances are loosely coupled, i.e. they need not be aware that they are operating in a fault tolerant environment. As such, the primary instance need not be specifically designed or programmed to interact with the fault tolerant mechanisms. Instead, the primary instance need only be designed to adhere to specific basic operating guidelines and shut itself down when it cannot do so. By externally controlling the ability of the primary instance to successfully adhere to its operating guidelines, the fault tolerant mechanisms of the disclosed embodiments can recognize error conditions and easily failover from the primary instance to the backup instance.
公开/授权文献
- US20080126853A1 Fault tolerance and failover using active copy-cat 公开/授权日:2008-05-29