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AWS Storage Gateway
User Guide (API Version 2013-06-30)

AWS Storage Gateway Limits

In this topic, you can find information about file share, volume, tape, configuration, and performance limits for Storage Gateway.

Limits For File Shares

The following table lists limits for file shares.

Description File Gateway
Maximum number of file shares per Amazon S3 bucket. There is a one-to-one mapping between a file share and an S3 bucket 1
Maximum number of file shares per gateway 10
The maximum size of an individual file, which is the maximum size of an individual object in Amazon S3

Note

If you write a file larger than 5 TB, you get a "file too large" error message and only the first 5 TB of the file is uploaded.

5 TB

Limits for Volumes

The following table lists limits for volumes.

Description Cached Volumes Stored Volumes
Maximum size of a volume

Note

If you create a snapshot from a cached volume that is more than 16 TiB in size, you cannot restore it to an Amazon Elastic Block Store (Amazon EBS) volume; however, it can be restored to a Storage Gateway volume.

32 TiB 16 TiB
Maximum number of volumes for a gateway 32 32
Total size of all volumes for a gateway 1,024 TiB 512 TiB

Limits for Tapes

The following table lists limits for tapes.

Description Tape Gateway
Minimum size of a virtual tape 100 GiB
Maximum size of a virtual tape 2.5 TiB
Maximum number of virtual tapes for a virtual tape library (VTL) 1,500
Total size of all tapes in a virtual tape library (VTL) 1 PiB
Maximum number of virtual tapes in archive No limit
Total size of all tapes in a archive No limit

Configuration and Performance Limits

The following table lists limits for configuration and performance.

Description File Gateway Cached Volumes Stored Volumes Tape Gateway
Maximum upload rate

Note

The maximum upload rate was achieved by using 100 percent sequential write operations and 256 KB I/Os. Depending on your I/O mix and network conditions, the actual rate might be lower.

120 MB/s 120 MB/s 120 MB/s
Maximum download rate 20 MB/s 20 MB/s 20 MB/s

Recommended Local Disk Sizes For Your Gateway

The following table recommends sizes for local disk storage for your deployed gateway.

Gateway Type Cache (minimum) Cache (maximum) Upload buffer (minimum) Upload buffer (maximum) Other required local disks
File gateway 150 GiB 16 TiB
Cached volume gateway 150 GiB 16 TiB 150 GiB

2 TiB

Stored volume gateway 150 GiB

2 TiB

1 or more for stored volume(s)
Tape gateway 150 GiB 16 TiB 150 GiB 2 TiB

Note

You can configure one or more local drives for your cache and upload buffer, up to the maximum capacity.

When adding cache or upload buffer to an existing gateway, it is important to create new disks in your host (hypervisor or Amazon EC2 instance). Don't change the size of existing disks if the disks have been previously allocated as either a cache or upload buffer.