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High Availability and Fault Tolerance Flashcards
| Front | Back |
| Difference between RTO and RPO | Recovery Time Objective focuses on downtime while Recovery Point Objective focuses on data loss tolerance. |
| How do EC2 status checks contribute to fault tolerance | By monitoring instance health and automatically recovering unhealthy instances. |
| How do Route 53 health checks support High Availability | By monitoring resources and routing traffic away from failed endpoints. |
| How does Amazon DynamoDB achieve high availability | By replicating data across multiple zones and offering eventually consistent reads. |
| How does Amazon SQS achieve fault tolerance | Queue messages are replicated and durable across multiple Availability Zones. |
| How does Elastic Load Balancing support High Availability | By distributing incoming traffic across multiple targets in multiple Availability Zones. |
| How does S3 cross-region replication help in disaster recovery | By automatically copying objects across regions for redundancy. |
| Key benefit of Elastic File System (EFS) for fault tolerance | EFS provides scalable, multi-AZ file storage that persists even during failures. |
| Key difference between Multi-AZ and Read Replica in RDS | Multi-AZ enhances availability; Read Replica is primarily for scaling workloads. |
| Use of AWS Lambda for Fault Tolerance | Lambda's automatic scaling and multi-AZ availability ensure high fault tolerance for applications. |
| What does AWS Auto Scaling do | Automatically adjusts capacity to maintain consistent performance and availability. |
| What does AWS CloudFormation ensure in high availability setups | Automated resource creation and updates across multiple regions/zones. |
| What is a quorum-based failover in databases | A failover model requiring a majority vote from nodes to confirm decision-making. |
| What is AWS Global Accelerator | A service that improves application availability through intelligent routing and global endpoints. |
| What is Fault Tolerance | The ability of a system to continue functioning even when one or more components fail. |
| What is High Availability | The ability of a system to remain operational and accessible for maximum time with minimal downtime. |
| What is Multi-AZ in AWS RDS | A deployment configuration that provides automatic failover to a secondary database in a different availability zone. |
| What is Pilot Light Disaster Recovery | A minimal backup environment with essential services ready to scale when needed. |
| What is the principle of a hot standby for disaster recovery | Maintaining a fully operational secondary environment that can take over instantly. |
| Why use AWS Backup | To centralize and automate backup for resources across various AWS services ensuring data resilience. |
Front
How does S3 cross-region replication help in disaster recovery
Click the card to flip
Back
By automatically copying objects across regions for redundancy.
Front
What is Multi-AZ in AWS RDS
Back
A deployment configuration that provides automatic failover to a secondary database in a different availability zone.
Front
Difference between RTO and RPO
Back
Recovery Time Objective focuses on downtime while Recovery Point Objective focuses on data loss tolerance.
Front
What is a quorum-based failover in databases
Back
A failover model requiring a majority vote from nodes to confirm decision-making.
Front
How do Route 53 health checks support High Availability
Back
By monitoring resources and routing traffic away from failed endpoints.
Front
What does AWS CloudFormation ensure in high availability setups
Back
Automated resource creation and updates across multiple regions/zones.
Front
How do EC2 status checks contribute to fault tolerance
Back
By monitoring instance health and automatically recovering unhealthy instances.
Front
Use of AWS Lambda for Fault Tolerance
Back
Lambda's automatic scaling and multi-AZ availability ensure high fault tolerance for applications.
Front
How does Amazon DynamoDB achieve high availability
Back
By replicating data across multiple zones and offering eventually consistent reads.
Front
What is AWS Global Accelerator
Back
A service that improves application availability through intelligent routing and global endpoints.
Front
How does Elastic Load Balancing support High Availability
Back
By distributing incoming traffic across multiple targets in multiple Availability Zones.
Front
What is Fault Tolerance
Back
The ability of a system to continue functioning even when one or more components fail.
Front
What is Pilot Light Disaster Recovery
Back
A minimal backup environment with essential services ready to scale when needed.
Front
What is the principle of a hot standby for disaster recovery
Back
Maintaining a fully operational secondary environment that can take over instantly.
Front
Key benefit of Elastic File System (EFS) for fault tolerance
Back
EFS provides scalable, multi-AZ file storage that persists even during failures.
Front
How does Amazon SQS achieve fault tolerance
Back
Queue messages are replicated and durable across multiple Availability Zones.
Front
Why use AWS Backup
Back
To centralize and automate backup for resources across various AWS services ensuring data resilience.
Front
What is High Availability
Back
The ability of a system to remain operational and accessible for maximum time with minimal downtime.
Front
Key difference between Multi-AZ and Read Replica in RDS
Back
Multi-AZ enhances availability; Read Replica is primarily for scaling workloads.
Front
What does AWS Auto Scaling do
Back
Automatically adjusts capacity to maintain consistent performance and availability.
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This deck explores ensuring business continuity through strategies for high availability, disaster recovery, and fault-tolerant architectures within AWS.