A system redundancy method in which a standby machine is kept in a fully operational state at all times, enabling an immediate switchover when the primary system fails. The key advantage is an extremely short failover time that maintains service continuity. Compared with cold standby (where the backup machine must be started after a failure), hot standby is more costly but dramatically reduces recovery time.

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• 2014h26h #56ホットスタンバイ方式の説明として，適切なものはどれか。