通过全局实例标识符。
在清单3中,实例标识符已经在命令行上传递以只显示关于该实例的信息。
In Listing 3, the instance identifier has been passed on the command line to only show information about that instance.
也就是说,实例不是用显式的“实例标识(instance ID)”来标识,而是用数据消息中的一些关键字域来标识。
That is, instances are identified not by an explicit "instance id" concept, but by some key fields within data messages.
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