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Shared Snapshots for EC2 Elastic Block Store Volumes

Last week I created a 180 GB volume from a Public Data Set

Amazon Cloud on Ulitzer

Amazon is adding a new feature which significantly improves the flexibility of EC2’s Elastic Block Store  (EBS) snapshot facility. You now have the ability to share your snapshots with other EC2 customers using a new set of fine-grained access controls. You can keep the snapshot to yourself (the default), share it with a list of EC2 customers, or share it publicly.

The Amazon Elastic Block Store lets you create block storage volumes in sizes ranging from 1 GB to 1 TB. You can create empty volumes or you can pre-populate them using one of our Public Data Sets. Once created, you attach each volume to an EC2 instance and then reference it like any other file system. The new volumes are ready in seconds. Last week I created a 180 GB volume from a Public Data Set, attached  it to my instance, and started examining it, all in about 15 seconds.

Here’s a visual overview of the data flow (in this diagram, the word Partner refers to anyone that you choose to share your data with):

You can use the AWS Management Console, the command line tools, or the EC2 API to create a snapshot backup of an EBS volume at any time. The snapshots are stored in Amazon S3. Once created, a snapshot can be used to create a new EBS volume in the same AWS region. Sharing these snapshots, as we are now letting you do, makes it possible for other users to create an identical copy of the volume.

The new ModifySnapshotAttribute function gives you the ability to set and change the createPermission attribute on any of your snapshots. Another feature added is the ResetSnapshotAttribute function to clear snapshot attributes and the DescribeSnapshotAttribute function to get the value of a particular attribute.

The DescribeSnapshots function now lists all of the snapshots that have been shared with you. You can also use this function to retrieve a list of all of our Public Data Sets.

You can also modify snapshot permissions using the AWS Management Console:

How can you use this?

  • If you are a teacher or professor, create and share a volume of reference data for use in a classroom setting (and take a look at the AWS in Education program too).
  • If you are a researcher, share your data and your results with your colleagues, both within your own organization and at other organizations.
  • If you are a developer, share your development and test environments with your teammates. Snapshot the environments before each release to make it easy to regenerate the environment later for regression tests.
  • If you are a business, you can use snapshots to store data internally, with external clients, or with partners. This could be reference data, results of a lengthy and expensive computation, a set of test cases (and expected results) or even a set of pre-populated database tables.

(Via Amazon Web Services Blog.)

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More Stories By Alin Irimie

Alin Irimie is a software engineer - architect, designer, and developer with over 10 years experience in various languages and technologies. Currently he is Messaging Security Manager at Sunbelt Software, a security company. He is also the CTO of RADSense Software, a software consulting company. He has expertise in Microsoft technologies such as .NET Framework, ASP.NET, AJAX, SQL Server, C#, C++, Ruby On Rails, Cloud computing (Amazon and Windows Azure),and he also blogs about cloud technologies here.

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