📖 What is Storage Gateway?
AWS Storage Gateway is a hybrid cloud storage service enabling on-premises applications to seamlessly access AWS cloud storage. It provides low-latency access to storage through file, volume, and tape gateway types, integrating on-premises environments with AWS services like S3 and Glacier.
"Understand the use cases for each gateway type: File Gateway (NFS/SMB), Volume Gateway (iSCSI), and Tape Gateway (VTL). Exam questions often focus on selecting the appropriate gateway type based on specific data access and backup requirements. Recognize its role in hybrid architectures."
📚 Certification: AWS Certified Cloud Practitioner (CLF-C02)
🔑 What are the Key Concepts of Storage Gateway?
- ▸ File Gateway provides file-based access to S3 using NFS or SMB protocols, ideal for on-premises applications needing cloud storage integration.
- ▸ Volume Gateway presents cloud storage as iSCSI volumes, allowing on-premises applications to use AWS storage as if it were local block storage.
- ▸ Tape Gateway replaces physical tape infrastructure with virtual tape libraries (VTL) backed by AWS Glacier for long-term archival.
- ▸ Storage Gateway caches frequently accessed data on-premises, reducing latency and bandwidth costs while maintaining data consistency with AWS.
- ▸ It supports both cached and stored data options, impacting performance and cost; understand the trade-offs for each gateway type.
🎯 How does Storage Gateway appear on the CLF-C02 Exam?
You may be asked to identify the best Storage Gateway type for a company needing to back up their on-premises databases to a cost-effective, long-term archive solution.
A scenario might describe an application requiring low-latency access to files stored in AWS; determine which gateway type would best meet this requirement.
Expect questions about choosing the appropriate gateway based on whether an application needs file, block, or tape-based access to cloud storage.
❓ Frequently Asked Questions
What are the implications of choosing cached vs. stored volumes for Volume Gateway?
Cached volumes store frequently accessed data locally, offering faster performance but higher costs. Stored volumes keep all data on-premises, requiring more local storage but reducing AWS costs.
Can Storage Gateway replace a full-scale migration to AWS?
No, Storage Gateway is a hybrid solution. It extends your on-premises environment to AWS, but doesn't eliminate the need for on-premises infrastructure entirely. It's for seamless integration, not complete replacement.
How does Storage Gateway handle data security?
Data in transit is encrypted using SSL, and data at rest is encrypted in S3 or Glacier. You can also use your own encryption keys (SSE-KMS) for enhanced security control.