#observability: “Observability is a borrowed term from mechanical engineering/control theory. It means, paraphrasing: “can you understand what is happening inside the system — can you understand ANY internal state the system may get itself into, simply by asking questions from the outside?” We can apply this concept to software in interesting ways, and we may end up using some data types, but that’s putting the cart before the horse.”
on 02021-11-11#Charity’s retrospective #introduction to #observability in 02021. “The world doesn’t need another classification word for existing data types. And it doesn’t need another synonym for “telemetry” or “insights.” But there is a coherent set of practices that started to emerge about five years ago, in response to changes in how we build modern systems — particularly microservices. Those practices are a fairly discontinuous leap from their heritage of using metrics and logs. In fact, some of the best practices are exactly opposite those of monitoring, and the respective data formats used are entirely incompatible. Those practices do need a word.”
on 02021-11-11#Observability at Etsy; this is the 2011 post that introduced statsd
on 02017-11-25Cindy Sridharan on #SRE #monitoring and #observability
on 02017-11-25