A scheme in a duplex system in which the standby system is kept running and the primary's data is always reflected to it. When the primary fails, processing can switch to the standby and continue in a short time. A scheme that keeps the standby stopped and starts it after a failure is called a cold standby.
Japanese name: ホットスタンバイ
Hot standby appears in 1 practice question across 1 topic, including System Architecture and Reliability.
Answer: A. The standby system is kept running and the primary's data is always reflected to it, so processing can switch over in a short time when the primary fails
A hot standby keeps the standby system running and always reflects the primary's data to it, so it can take over processing in a short time when the primary fails. If the MES stops, the fab can no longer direct how lots move, specify recipes to equipment or record manufacturing history, so a configuration that can switch over in a short time is generally chosen. Keeping the standby stopped and starting it after a failure is a cold standby, and the intermediate case (running, but needing preparation before taking over processing) is called a warm standby. Performing and comparing the same processing on two systems at the same time is a dual system.
A hot standby keeps the standby system running and always reflects the primary's data to it, so it can take over processing in a short time when the primary fails.
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Duplex system Dual system Differential backup Fail-safe Fail-soft Fault tolerance Fool-proof Incremental backup Load balancer RAID