Transaction and HTTP request metering based on CPU time per hour, minute, or second is the most accurate billing and metering model, as each transaction can be measured for total cost.
Each service may only provide a small part of the overall business transaction, with results of one operation feeding into the processing of another (such as order fulfillment and billing).
每个服务只提供整个业务事务的一小部分,结果是一个操作进入另一个的处理中(例如订单执行和记账)。
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Here, t1234 is the transaction id that identifies the transaction; each service ties the elapsed CPU time to the transaction id for later billing and metering.