Storage Gateway ¶

AWS Storage Gateway is a hybrid-cloud storage service that gives you on-premises access to virtually unlimited cloud storage.
Customers use Storage Gateway to simplify storage management and reduce costs for key hybrid cloud storage use cases.
Storage Gateway provides a standard set of storage protocols such as iSCSI, SMB, and NFS, which allow you to use AWS storage without rewriting your existing applications.
It provides low-latency performance by caching frequently accessed data on premises, while storing data securely and durably in Amazon cloud storage services.
Storage Gateway optimizes data transfer to AWS by sending only changed data and compressing data

Types based on installation¶

They are of two types:

Two types of file sharing protocols are:

SMB: Made by IBM originally and then taken by Microsoft. It is best used for Windows.
NFS: Made by Sun. It can be used both with SMB and NFS.

3 different types of fo storage gateways are:

File gateway (using NFS): The File Gateway presents a file interface that enables you to store files as objects in Amazon S3 using the industry-standard NFS and SMB file protocols, and access those files via NFS and SMB from your datacenter or Amazon EC2, or access those files as objects with the S3 API.
Volume Gateway: The Volume Gateway presents your applications block storage volumes using the iSCSI protocol. Data written to these volumes can be asynchronously backed up as point-in-time snapshots of your volumes, and stored in the cloud as Amazon EBS snapshots. Tape Gateway: Used to backup data into the glacier.
Cached volumes: Entire dataset is stored on S3 and the most frequently used data is cached on-prem

Storage Gateway supports four key hybrid cloud use cases

Snapshots are incremental backups (delta) which will only capture the changed blocks.
In the case of stored volume all the data is stored on the data center (on-prem) and the data is replicated to the backend server in an Async fashion
VM is used to replicate the data.