Site Reliability Engineering (SRE) is a discipline that applies software engineering principles to IT operations, with the goal of creating highly reliable and scalable systems. SREs focus on automating operational tasks, monitoring system performance, and responding to incidents, all while balancing the need for rapid development with the imperative of system stability. Key practices include defining service-level objectives (SLOs), managing error budgets, and using data-driven approaches to improve system reliability. In essence, SRE aims to ensure that software systems remain available, performant, and resilient in the face of constant change and increasing complexity.

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