High Availability

Overview PostgreSQL High Availability: Patroni and etcd Cluster Deployment is an essential skill in SRE operations. In production environments, mastering these techniques can significantly improve system stability and operational efficiency. Why PostgreSQL High Availability Matters As systems grow in scale and complexity, traditional operations approaches struggle to meet the demands of modern distributed systems. PostgreSQL High Availability helps operations teams: Rapid Problem Resolution: Systematic tools and methods reduce troubleshooting time Improved System Visibility: Establish comprehensive monitoring and observability Proactive Fault Prevention: Identify and fix potential risks before they cause outages Resource Optimization: Allocate and schedule resources efficiently Core Concepts and Principles Basic Concepts The core of PostgreSQL High Availability lies in establishing standardized processes and automated toolchains....

Overview Redis Operations: Persistence, High Availability, and Performance Monitoring is an essential skill in SRE operations. In production environments, mastering these techniques can significantly improve system stability and operational efficiency. Why Redis Operations Matters As systems grow in scale and complexity, traditional operations approaches struggle to meet the demands of modern distributed systems. Redis Operations helps operations teams: Rapid Problem Resolution: Systematic tools and methods reduce troubleshooting time Improved System Visibility: Establish comprehensive monitoring and observability Proactive Fault Prevention: Identify and fix potential risks before they cause outages Resource Optimization: Allocate and schedule resources efficiently Core Concepts and Principles Basic Concepts The core of Redis Operations lies in establishing standardized processes and automated toolchains....

Overview When your business grows from “serving one city” to “serving the entire country” or even “serving globally,” single-datacenter architecture hits two hard constraints: latency from distance and single point of failure risk. Multi-region active-active architecture is the engineering solution to both problems. But active-active architecture is one of the most complex topics in SRE — it’s not simply “deploy the service in two datacenters.” It involves a series of deep engineering challenges: data consistency, traffic routing, failover, and operational complexity....

Overview Prometheus defaults to a single-node architecture, which is a dangerous liability in production environments. A single Prometheus instance going down means your entire monitoring system goes blind — you can’t see any metrics during the failure, and alerts stop working because rules are no longer evaluated. As data volume grows to the limits of a single machine’s storage and processing capacity, you’ll face write timeouts, slow queries, and disk exhaustion....