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Difficulty: EasyResilient and Highly Available Storage Infrastructure

A financial firm needs to back up its daily transaction logs to AWS. The backups must be stored in a highly durable manner across multiple Availability Zones, and they must be immediately accessible for the first 30 days. For compliance, these backups must be replicated to a secondary AWS Region. After 30 days, the backups are rarely accessed but must be retained for 7 years. Which TWO actions should a solutions architect combine to meet these requirements?

  1. Store the daily backups in an Amazon S3 bucket, and configure Amazon S3 Cross-Region Replication (CRR) to copy them to a bucket in a secondary AWS Region.Answer
  2. Configure an Amazon S3 Lifecycle policy to transition the backup objects in both buckets to Amazon S3 Glacier Flexible Retrieval after 30 days.Answer
  3. C
    Store the daily backups in Amazon S3 Glacier Flexible Retrieval from day one to minimize initial storage costs.
  4. D
    Store the backups on Amazon EBS gp3 volumes and enable EBS Multi-Attach to share the backup files across multiple EC2 instances in different regions.
  5. E
    Configure an Amazon S3 Lifecycle policy to transition the backup objects to Amazon S3 Standard-IA after 5 days to reduce costs.

Answer

Storing the daily backups in an Amazon S3 bucket with Cross-Region Replication (CRR) enabled, and configuring an S3 Lifecycle policy to transition the backup objects to Amazon S3 Glacier Flexible Retrieval after 30 days.
Storing the daily backups in Amazon S3 ensures the data is replicated across multiple Availability Zones, providing high resilience and immediate retrieval. Cross-Region Replication (CRR) automates the replication of these backups to a secondary AWS Region for disaster recovery and compliance. Finally, an Amazon S3 Lifecycle policy configured to transition the backups to Amazon S3 Glacier Flexible Retrieval after 30 days minimizes long-term storage costs while complying with the 7-year retention period, as the data is rarely accessed after the initial month.

Step-by-Step Solution

1
Store the data in Amazon S3 Standard to ensure high availability and durability across multiple Availability Zones, meeting the requirement of immediate accessibility for the first 30 days.
The backups are durable and immediately accessible.
S3 Standard provides low-latency, high-throughput access to objects with automatic replication across multiple AZs.
2
Configure Amazon S3 Cross-Region Replication (CRR) to copy new objects automatically to a destination bucket in a secondary AWS Region.
A copy of the backups is safely stored in a secondary AWS Region for compliance.
S3 CRR is the standard method for replicating S3 objects across different AWS Regions automatically.
3
Apply an Amazon S3 Lifecycle policy to transition objects from S3 Standard to S3 Glacier Flexible Retrieval after 30 days.
Data older than 30 days is moved to lower-cost archive storage, meeting the 7-year retention requirement cost-effectively.
S3 Glacier Flexible Retrieval is ideal for archiving data that is rarely accessed and can tolerate retrieval times of minutes to hours.

Key Concept

Leveraging Amazon S3 features such as Cross-Region Replication (CRR) and Lifecycle policies to build resilient, highly available, and cost-effective storage architectures.
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Topics

Resilient and Highly Available Storage Infrastructure

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