监控软件
监控软件 CAT（Central Application Tracking）是一个实时和接近全量的监控系统，它侧重于对Java应用的监控，基本接入了美团上海侧所有核心应用。目前在中间件（MVC、RPC、数据库、缓存等）框架中得到广泛应用，为美团各业务线提供系统的性能指标、健康状况、监控告警等。自2014年开源以来，除了美团之外，CAT还在携程、陆金所、猎聘网、找钢网等多家互联网公司生产环境应用，项目的开源地址是 http://github.com/dianping/cat。
本文会对CAT整体设计、客户端、服务端等的一些设计思路做详细深入的介绍。
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