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AWS Storage Gateway

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AWS Storage Gateway

A hybrid cloud storage service that presents on-premises file, block, or tape interfaces while storing data in AWS. It operates as a gateway appliance (virtual machine or AWS-hosted gateway) that forwards data and metadata to Amazon S3 and related AWS storage services. It is used to integrate on-premises applications with AWS storage without changing application access patterns.

🗂 Resource Category

Storage • Migration and Transfer

🧠 Exam Memory Hook

Think: On-prem apps + S3-backed file, block, or tape interfaces = AWS Storage Gateway

📖 Ownership

Classification: Shared Responsibility Service

AWS responsibilities: AWS operates and secures the Storage Gateway control plane and the cloud storage backend (for example Amazon S3 and service endpoints), manages and patches the AWS-owned physical infrastructure and the service platform, and provides the APIs, IAM integration, and monitoring endpoints.

Customer responsibilities: The customer deploys and configures the gateway appliance or chooses an AWS-hosted gateway, configures access controls and IAM roles, secures network connectivity (Direct Connect or Internet), manages local cache sizing and retention settings, monitors gateway metrics and logs, and manages data lifecycle and access policies; the customer also ensures backups, restores, and application-level data integrity as required.

Patching responsibilities: AWS patches and maintains the AWS physical infrastructure, hypervisor, and the Storage Gateway service control plane and managed runtime in the cloud. The customer patches and maintains the gateway virtual appliance guest operating system, any software components they install on the gateway host, application libraries and dependencies, and customer-deployed applications; if the gateway is launched on Amazon EC2 the guest OS and software remain the customer's responsibility.

🏗 Typical Architecture

💡 Top 5 Features

  • File Gateway presents NFS and SMB file interfaces and stores objects in Amazon S3.
  • Volume Gateway exposes iSCSI block volumes to on-premises hosts with snapshots stored in AWS.
  • Tape Gateway provides a virtual tape library interface for existing backup software to store virtual tapes in AWS.
  • Local cache stores frequently accessed data on-premises to reduce read latency for local applications.
  • Integrates with IAM and AWS KMS to control access and encrypt data stored in the cloud.

✅ Top 5 Use Cases

  • Provide cloud-backed NFS or SMB file shares for on-premises applications while keeping primary data in Amazon S3.
  • Enable existing backup applications to send backups to a virtual tape library that is archived in AWS.
  • Mirror or snapshot on-premises block volumes to AWS for disaster recovery and cloud-based restore workflows.
  • Migrate on-premises file data to Amazon S3 by presenting familiar file protocols to users and tools.
  • Tier cold or infrequently accessed on-premises data to AWS to reduce on-premises storage footprint while retaining local low-latency access for hot data.

🏗 Architecture Placement

AWS Storage Gateway typically runs as a virtual appliance on-premises or as an AWS-hosted gateway and receives NFS/SMB/iSCSI or VTL requests from local applications; it connects to AWS storage services (for example Amazon S3) over the network and integrates with IAM for access control and CloudWatch for monitoring. Depending on deployment, traffic flows over the public internet or Direct Connect and the gateway maintains a local cache to reduce read latency.

🎯 Commonly Used With

- Amazon S3
- AWS Identity and Access Management
- AWS Key Management Service
- Amazon CloudWatch
- Amazon VPC

🌍 5 Real-World Examples

  • A healthcare provider uses File Gateway to expose secure NFS shares for imaging systems while storing the master objects in Amazon S3 for lifecycle and archival.
  • A financial services firm uses Tape Gateway to replace physical tape workflows so nightly backups are written to a virtual tape library stored in AWS.
  • A media production house uses Volume Gateway to snapshot on-premises editing volumes to AWS to enable cloud-based restore and long-term retention.
  • A retail chain migrates store-level logs and reports to Amazon S3 using a File Gateway to avoid changing local POS software.
  • A government archive uses Tape Gateway to present virtual tapes to existing backup software while keeping tapes retained in AWS storage classes.

🎓 AWS Exam Clues

  • Use when on-premises applications require standard file protocols (NFS/SMB) but storage should be backed by Amazon S3.
  • Choose Tape Gateway when legacy backup applications require a virtual tape library interface to move backups to AWS.
  • Consider Volume Gateway for iSCSI block volumes that need cloud-backed snapshots for DR and restore workflows.
  • Evaluate network connectivity, bandwidth, and local cache sizing because on-premises performance depends on cache and link characteristics.
  • Remember to manage IAM roles and KMS keys for encryption and to monitor metrics in Amazon CloudWatch for gateway health.

📝 Quick Revision

AWS Storage Gateway provides hybrid storage by presenting file, block, or tape interfaces that transparently back data to AWS (commonly Amazon S3). Use it when you need to integrate existing on-premises applications or backup workflows with AWS storage; plan for gateway VM patching, network bandwidth, cache sizing, IAM, and encryption configuration.

🏷 Keywords

file gateway • volume gateway • tape gateway • NFS • SMB • iSCSI • virtual tape library • local cache • virtual appliance • AWS KMS • Amazon CloudWatch • hybrid storage