![]() Failover-the ability to switch from an active system component to a redundant component in case of failure, imminent failure, degraded performance or functionality.Monitoring-identifying problems in production systems that may disrupt or degrade service.Redundancy-ensuring that critical system components have another identical component with the same data, that can take over in case of failure.The following elements help you implement highly available systems: For example, “four nines” is indicative of a system that is up 99.99% of the time, meaning it is down for only 52.6 minutes during an entire year. The number of “nines” is commonly used to indicate the degree of high availability. High availability is commonly measured as a percentage of uptime. They are also resilient, meaning that they are able to simply handle failure without service disruption or data loss, and seamlessly recover from such failure. Highly available systems are reliable in the sense that they continue operating even when critical components fail. Achieve AWS high availability with Cloud Volumes ONTAP.AWS high availability for storage services.AWS high availability for SQL databases on Amazon RDS. ![]() AWS high availability for EC2 instances. ![]()
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