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    4.2 集中监控体系

    所谓“监控”,即包括“监”+“控”,即应该具备对运维数字世界的运行情况进行感知、决策、应急处置的能力,是业务连续性保障能力的基础。因为要感知,所以监控需要具备实时的数据采集能力,而监控采集的性能、容量、运营等数据又为智能运维提供数据资产。由于生产系统运行涉及面极广,监控工具很多,企业很自然的会有合而为一的决策,像集中监控就是一个常见的项目。但是,需要关注的是,一方面市场上成熟的监控系统很多,不同层面的监控工具关注点又各不一样,通常很难选择一个包罗所有能力的监控系统;另一方面企业里的监控系统经过一段时间沉淀,原有监控系统最大的价值已经不是监控系统本身,而是上面的监控配置项,事实上很多技术架构及功能并不优秀的监控系统很难替换的原因就在于此。所以,本文讲的集中监控不是讲一个监控系统,而站在运维组织角度看监控体系。

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    Google Earth Engine ——FORMA是一个基于MODIS的湿润热带森林的毁林警报系统数据集

    FORMA is a MODIS-based deforestation alerting system for the humid tropical forests. FORMA is designed for quick identification of new areas of tree cover loss. The system analyzes data gathered daily by the MODIS sensor, which operates on NASA's Terra and Aqua satellites. The FORMA alerts system then detects pronounced changes in vegetation cover over time, as measured by the Normalized Difference Vegetation Index (NDVI), a measure of vegetation greenness. These pronounced changes in vegetation cover are likely to indicate forest being cleared, burned, or defoliated. An alert is added to the dataset by setting the pixel value to the date at which a change was detected. FORMA alerts only appear in areas where the probability of tree cover loss is greater than or equal to 50%. FORMA data has 500-meter spatial resolution and twice-monthly update interval. FORMA alerts start in January 2006.

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