公共跟踪api在apm的目标环境中的实现和应用提供了一些一致性。
The implementation and use of a common tracing API throughout an APM's target environment provides some consistency.
可是，他们的企业里有着网状互联的遗留应用和异构环境，比如主机、AIX等等。这些系统阻碍了他们向公共云的整体跨跃。
However, they have a web of interconnected legacy applications and heterogeneous environments including mainframe, AIX, etc. that prevent them from making a wholesale jump to a cloud provider.
灵活的：过滤器在Web处理环境中的应用很广泛，涵盖诸如日志记录和安全等许多最公共的辅助任务。
Flexible: the application of filters to a Web processing environment is broad, covering many of the most common auxiliary's tasks such as logging and security.
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