- Load balancers
When users visit a site! requests are sent not to one server! but to several at the same time. If one server fails! the balancer automatically r.irects traffic to other working servers. Nginx and HAProxy programs distribute incoming traffic between several servers and increase stability.
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Server clustering
Instead of one server! a cluster is telegram number list creat. – a group of servers working as a single one. If one fails! the others continue to process requests for stabilization. Clusters can be active-active! when servers work simultaneously! or active-standby! where reserve capacities are turn. on only in case of failures.
Scaling using clusters is requir. when 6 benefits of using a crm the project operates 24/7 without interruptions! the load exce.s 10!000 RPS! one server cannot cope! and also when geographic fault tolerance with backup servers is requir..
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Backup
Backups are creat. on a sch.ule and stor. separately from the main infrastructure! for example! in the cloud or another data center. To search engine optimization mails ensure the system works without failures! set up automatic recovery (Disaster Recovery)! which automatically starts a copy in the event of a server failure.
Monitoring and alerts are necessary for response to failures! to receive notifications about problems before the site “falls”. Monitoring is also ne.. to track the load on the CPU! RAM! database! network and to identify anomalies! suspicious actions. For example! a sharp increase in the number of 500 errors.
Monitoring collects metrics: resource load! number of requests! errors! response time and other indicators. If the values are outside the norm! the system sends an email alert. For these tasks! we use Zabbix – server monitoring and Prometheus + Grafana for metrics and visualization.