[AWS] Storage Gateway

Storage Gateway is a hybrid storage service that allows you to migrate data into AWS, extending on-premise storage capacity using AWS.

  • It is used when you want to integrate the existing on-premise application data with AWS cloud storage services without fully migrating to AWS. Applications in your network can access data in the cloud.
  • Data may be moved to AWS and cached them locally at the on-premise data center.
  • Key Management Service (KMS) can encrypt data at rest in the cloud.
  • CloudWatch can be used for monitoring, and CloudTrail can be used for logging account activity.

Use Cases

  • Reduce on-premises storage with cloud-backed file shares
  • Provide on-premises applications low latency access to data stored in AWS

File Gateway

  • File Gateway is a file-based interface to S3. It stores data in S3 and offers SMB (Server Message Block) or NFS (Network File System)-based access to the data.
  • A software appliance or a Gateway is deployed in EC2 or on-premise environment (VMs).
  • Recently accessed data is cached in the gateway.
  • Once in S3, you can access the objects directly or manage them using features such as S3 lifecycle policies and cross-region replication.
  • File Gateway supports S3 Standard, IA, or One-zone IA. You cannot transfer files directly to Glacier, but you can set the lifecycle policy. If an application attempts to access a file in Amazon S3 Glacier, you will receive a generic I/O error.
  • File Gateway integrates with Microsoft Active Directory on-premises as well as with in-cloud Active Directory solutions such as Managed Microsoft AD.

Volume Gateway

  • Applications access data in the volume storage in AWS using iSCSI (Internet Small Computer System Interface) connectivity.
  • Data on the volumes are stored in Amazon S3, and you can take point in time copies of volumes, which are stored as Amazon EBS snapshots. You need to mount the entire volume to access data.
  • Volumes are stored in an Amazon S3 bucket maintained by the AWS Storage Gateway service. Your volumes are accessible for I/O operations through AWS Storage Gateway. You cannot directly access them using Amazon S3 API actions.
  • Stored Volumes: Data are stored at the on-premise data center and backed up to AWS using snapshots.
  • Cached Volumes: Data are stored in S3 and cached in the on-premise data center for fast access.

Virtual Tape Gateway (VTL)

  • Cost-effective, long-term data archiving.
  • Virtual tapes are available for immediate access and are backed by Amazon S3.
  • Tapes can be archived. Archived tapes are stored in Amazon S3 Glacier or Amazon S3 Glacier Deep Archive.

How to use Storage Gateway Services

  • You can use a Virtual application gateway (Gateway VM appliance) or a Physical hardware appliance.
  • On-premises, you can deploy a virtual machine containing the Storage Gateway software on VMware ESXi, Microsoft Hyper-V, or Linux KVM, or you can deploy Storage Gateway as a hardware appliance. You can also deploy the Storage Gateway VM in VMware Cloud on AWS, or as an AMI in Amazon EC2.
  • Once you’ve installed your gateway, you associate it with your AWS Account through our activation process.
  • After activation, you configure the gateway to connect to the appropriate storage type.

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