Modern IT systems collect an increasing wealth of data from network gear, operating systems, applications, and other components. This data needs to be analyzed to derive vital information about the user experience and business performance. For instance, faults need to be detected, service quality needs to be measured and resource usage of the next days and month needs to be forecasted.
Rule #1: Spend more time working on code that analyzes the meaning of metrics, than code that collects, moves, stores and displays metrics. —Adrian Cockcroft1
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