Hot standby system

Details Hot standby system Hot standby system

2004-10-04

2008-08-26

McCarthy, Christopher S (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S013000

Reexamination Certificate

active

07418624

ABSTRACT:
Consistency of a shared disk is secured in system switching in a hot standby system. In the standby system in which an active computer and standby computer share the shared disk, when a write I/O request is issued from the active computer, information about a start of the I/O is recorded in, for example, a memory. When the I/O is completed, the information is deleted from the memory. When a failure occurs in the active computer, the active computer transmits the record of the information about the start of the I/O, to the standby computer. The standby computer verifies the record to recover a disk in which the I/O is to be executed.

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King, Richard P. and Halim, Nagui, Management of a Remote Backup Copy for Disaster Recovery, ACM Transactions on Databse System, vol. 16, No. 2, Jun. 1991, pp. 338-368.

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