Storage Gateway
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Introduction
Connects on-premises data to connect to AWS S3 for backup or caching purpose
Feature
Storage Gateway's software appliance is available for download as a virtual machine image for client's data center
Types:
File Gateway (NFS -> File Gateway -> S3)
File Gateway appliance is a virtual machine to bridge between your NFS and S3
Metadata and directory structures are preserved
Configured S3 buckets are accessible using the NFS and SMB protocol
Each File Gateway should have an IAM role to access S3
Most recently used data is cached in the File Gateway
Scenario
work with S3 lifecycle policy
work with S3 object versioning
Must use the "RefreshCache" API on File Gateway to be notified of restore
work with S3 object lock
Enables to have the File Gateway for Write Once Read Many (WORM) data
If there are file modifications or renames in the file share clients, the File Gateway creates a new version of the object without affecting prior versions, and the original locked version will remain unchanged
Volume Gateway (Block storage using iSCSI protocol backed by S3)
Data written to volumes can be asynchronously backed up as point-in-time snashots, stored in the cloud as EBS snashots. Snapshots are incremental and also comporessed. (accessing data from S3 through EBS, not to S3 directly)
Sub types:
Stored Volume
Full data is stored on site, low-latency access, scheduled backups to S3
1Gb ~ 512TB with 32 volumes
Cache Volume
Full data is on S3, most frequent accessed data is cached on site
1Gb ~ 1024TB with 32 volumes
Can configure to against playback attacks
Tape Gateway (or called Gateway Virtual Tape Library (VTL) for archiving)
Ingest data into Glacier
If needs further processing after ingestion, use other types of Storage Gateway.
Can't asscess single file within tapes, must restore the tape entirely.
Architectures
