In this layer, they also run a second HDFS installation (with a separate name node), which acts as a hot standy - if the primary HDFS is down, the system writes to the backup HDFS.

在这个层次，运行第二个HDFS实例(使用单独的名字节点)，作为热备份——如果主HDFS宕机，系统将向备份的HDFS写入。

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Also, the system had to run around the clock, so we wanted hot standby, replication, and other availability and fault tolerance features.

同时，系统必须可以24小时不间断运行，因此我们希望它具有热备功能、复制、其他的可用性和容错特性。

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Once completed, existing building systems will be switched over to run off the new district hot water system, further reducing dependence on fossil fuels.

一旦完成，现在的建筑体系将形成新的区域热水系统，进一步减少对于化石燃料的依赖。

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The hot light fusion system can run every hour to two hours throughout the day.

加热的光融合系统，可以在整个白天每1小时或2小时运作一次。

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The hot light fusion system can run every hour to two hours throughout the day.

加热的光融合系统，可以在整个白天每1小时或2小时运作一次。

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