高可用性计费和计量能在需求可预测的情况下根据实际需要提升服务的质量。
High-availability billing and metering enables improved quality of service based on actual demand in cases where demand can be anticipated.
这一级别可用于如下情况，在计费系统中，消息重复或丢失会导致不正确的结果。
This level could be used, for example, with billing systems where duplicate or lost messages could lead to incorrect charges being applied.
对SaaS应用程序计费和计量的传统观念是每月固定费用；有些情况下，根据数据量或“座位数”，对计费和定价进行了优化。
The traditional concept for billing and metering SaaS applications is a monthly fixed cost; in some cases, depending on the amount of data or number of "seats," the billing and pricing are optimized.
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