Storage Gateway Flashcards
What is Storage Gateway?
A virtual machine or hardware appliance that acts as a bridge between storage on-premises and AWS.
How does Storage Gateway present storage?
Using iSCSI for volumes, NFS or SMB for files.
What AWS data storage products does Storage Gateway integrate with?
EBS, S3, and Glacier.
When would you use Storage Gateway?
For data migrations, extension of storage into AWS, storage tiering, disaster recovery, and replacement of backup systems.
Where is data stored when Storage Gateway is running in Volume Stored mode?
All data is stored locally (on-premises).
What does Storage Gateway running in Volume Stored mode provide?
Local storage that is backed up in AWS via EBS Snapshots.
What does Storage Gateway running in Volume Cached mode provide?
Capacity extension into AWS. Storage appears to be local, but is actually in AWS. Frequently accessed data is cached locally.
Where is data stored when Storage Gateway is running in Volume Cached mode?
Primary storage is in AWS, but data is cached locally (on-premises).
What does Storage Gateway running in VTL mode provide?
A virtual tape library (VTL) for large, sequential data backups. The VTL runs in S3 and the tape shelf runs in Glacier. Virtual tapes can be archived from S3 to Glacier or retrieved back from Glacier as necessary.
Because Glacier is used for the tape shelf, there is unlimited archive storage.
What does Storage Gateway running in File mode provide?
A bridge between on-premises file storage and S3. Mount points (shares) are available using NFS or SMB. Data maps directly onto an S3 bucket and are visible as objects in that bucket.
Can you see objects stored by Storage Gateway running in File mode in S3?
Yes. The objects are visible in S3. The S3 Objects are also visible as on-premises files.
What is a Bucket Share?
The mapping for an S3 bucket to an on-premises file share using Storage Gateway running in File mode.
Where is data primarily held using Storage Gateway running in File mode?
The data is primarily held in S3 but is cached locally.
What option is needed to ensure that new files added at one on-premises location show up immediately at other on-premises locations that are using the same Storage Gateway running in File mode solution?
Use the NotifyWhenUploaded API to notify others gateways when objects are changed.
Does Storage Gateway running in File mode support concurrent modification?
No. There is no file locking or concurrent modification.
