我们应从小数点后开始计算可靠性9的个数
文章提出了一种衡量系统可靠性的新视角：不应将"三个9"（99.9%）简单地视为从整数位开始计数，而应从小数点后第一位开始。作者认为，传统的可靠性度量方式（如99.9%、99.99%）容易让人产生误解，因为人们往往忽略了小数点前的数字已经占据了大部分百分比。从十进制角度重新定义后，能更直观地反映实际故障率，从而更准确地评估系统真实可用性。
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