TPS: Reports back the number of transfers per second issued to the physical disk.

tps：报告每秒钟发送到物理磁盘的传输量。

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As a result, a high number of physical disk reads are usually required to ensure consistently low transaction response times.

结果，它一般需要大量的物理磁盘读操作来保证实现一致的低事务响应时间。

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The inter-disk policy defines the number of disks on which the physical partitions of a logical volume actually resides.

inter-disk 策略定义了一个逻辑卷的物理分区实际驻留的磁盘的数目。

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