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Method for synchronizing redundant platforms via idle-mode throttling of the high-speed interface between the north and south bridge components

IP.com Disclosure Number: IPCOM000008220D
Publication Date: 2002-May-28
Document File: 2 page(s) / 34K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for synchronizing redundant platforms via idle-mode throttling of the high-speed interface between the north and south bridge components. Benefits include improved functionality and improved performance.

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Method for synchronizing redundant platforms via idle-mode throttling of the high-speed interface between the north and south bridge components

Disclosed is a method for synchronizing redundant platforms via idle-mode throttling of the high-speed interface between the north and south bridge components. Benefits include improved functionality and improved performance.

Background

              A number of different approaches are used to make systems highly available. One method is redundant execution on two identical platforms. The system appears as a single platform to the external world but internally duplicates all communication and execution. When the primary platform fails, control logic immediately switches to the secondary platform with no perceived loss of data/control to the external world. This approach is effective so long as synchronization between the primary and secondary platforms is maintained.

              For many systems, platform synchronization is performed via software on each platform that communicates with each other via existing hardware interfaces. This approach explicitly limits the failover time.

              In many conventional solutions, the granularity of synchronization can be high because each platform must define synchronization events to throttle the entire platform rather than just one interface.

              Some conventional hardware solutions use wait states at the processor bus and PCI bus to throttle traffic for synchronization. This approach has created many difficulties with clock speeds, scalability, and licensing.

Description

              The disclosed method synchronizes redundant platforms that use the 3GIO interface. ...