Finally, with full system replication, you can't take advantage of the high availability environment to reduce OS upgrade outages, or for less disruptive hardware maintenance.
A high availability solution guarantees that a system will automatically recover in the event of a software or hardware failure.
万一软件或硬件发生故障，一个高可用性解决方案保证系统自动恢复。
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High availability systems combine software with industry-standard hardware to minimize downtime by quickly restoring services when a system, component, or application fails.