noun
hot standby
IT term for a redundant system or component that is powered on and ready to take over immediately if the primary fails.
サーバーはホットスタンバイ構成で冗長化されている。
The servers are made redundant with a hot standby configuration.
Variant with a middle dot; less common but seen in some technical documents.
Borrowed from English 'hot standby', a compound of 'hot' (powered on, active) and 'standby' (ready reserve).