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AWS Services for High Availability
AWS Services for High Availability
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seven yevale
2 posts
Jun 08, 2024
2:18 AM
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1. Amazon EC2
Amazon EC2 provides scalable computing capacity in the AWS cloud. To achieve high availability:
Multi-AZ Deployments: Deploy EC2 instances across multiple Availability Zones (AZs) to protect against data center failures. AWS Training in Pune
Auto Scaling: Automatically adjust the number of EC2 instances based on demand to maintain performance and reduce costs.
2. Elastic Load Balancing (ELB)
Elastic Load Balancing distributes incoming application traffic across multiple targets, such as EC2 instances, containers, and IP addresses:
Cross-Zone Load Balancing: Ensures even distribution of traffic across multiple AZs.
Health Checks: Automatically monitors the health of registered targets and routes traffic only to healthy targets.
3. Amazon RDS
Amazon RDS provides scalable and managed relational database services. For high availability:
Multi-AZ Deployments: Automatically replicates data across multiple AZs for failover support.
Automated Backups and Snapshots: Ensure data is backed up regularly and can be restored quickly. AWS Classes in Pune
4. Amazon S3
Amazon S3 offers highly durable and scalable object storage:
Cross-Region Replication: Automatically replicates S3 objects to another AWS region for disaster recovery and increased availability.
Versioning: Maintains multiple versions of an object to protect against accidental deletion or overwriting.
5. Amazon Route 53
Amazon Route 53 is a scalable DNS and domain name management service:
Health Checks and Failover: Routinely checks the health of your resources and routes traffic away from unhealthy resources.
Latency-Based Routing: Directs users to the AWS region with the lowest latency for optimal performance.
Designing a Highly Available Architecture
1. Multi-Region Deployments
Deploying applications across multiple AWS regions ensures that even if an entire region fails, your application remains available:
Active-Active: All regions are active and handle traffic simultaneously.
Active-Passive: One region is primary, and the others are on standby, ready to take over in case of a failure.
2. Decoupling Components
Decouple application components to reduce dependencies and improve fault tolerance:
Amazon SQS: Use Amazon Simple Queue Service to decouple and scale microservices, distributed systems, and serverless applications.
Amazon SNS: Use Amazon Simple Notification Service for decoupling and coordinating distributed applications through message publishing and subscribing. AWS Course in Pune
3. Database Replication
Implement database replication to ensure data availability and durability:
Amazon RDS Read Replicas: Offload read traffic from the primary database and increase scalability.
Amazon Aurora Global Database: Span multiple AWS regions to ensure high availability and low-latency global reads.
4. Backup and Recovery
Ensure that you have robust backup and recovery mechanisms in place:
AWS Backup: Centralize and automate data backup across AWS services.
Amazon Glacier: Store long-term backups cost-effectively with Amazon Glacier and Glacier Deep Archive.
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