Understanding High Availability: High availability (HA) refers to systems that are durable and likely to operate continuously without failure for a long time. HA ensures that an architecture can withstand failures with minimal downtime.
Importance of High Availability:
Redundancy: Systems are designed with redundancy to prevent single points of failure.
Fault Tolerance: Ensures that failures do not result in significant downtime, maintaining service continuity.
Automated Recovery: Utilizes automated recovery mechanisms to quickly restore services in the event of a failure.
AWS Services for High Availability:
Multi-AZ Deployments: Services like RDS, DynamoDB, and others support Multi-AZ deployments for fault tolerance.
Elastic Load Balancing: Distributes traffic across multiple instances or availability zones to ensure no single point of failure.
Auto Scaling: Automatically adjusts the number of instances based on demand, ensuring availability even during traffic spikes.
AWS Well-Architected Framework: Reliability
