Amazon's Elastic Block Store (EBS) can be used as block level storage volumes for your Amazon EC2 instances. An EBS Volume functions as a network-attached form of block level storage that persists independently from a Server's (Instance's) life. EBS Storage Volumes offer high availability, increased reliability, and predictability and can be attached to a running Server as well as exposed as a device within the Server. This Amazon Cloud Services feature is a great choice for any application requiring a database or file system and works well when access to raw block level storage is required. To learn more, please refer to the Amazon Elastic Book Store page.
To manage your EBS Volumes, go to Main Menu > AWS > EBS Volumes.
You will see a list of all EBS Volumes currently residing within Scalr. From here you can Search for a specific volume by entering a keyword or selecting a Location. Additional selections are provided for maneuvering through each page and refreshing the screen. The New Volume Button may be used to create a new EBS Volume within Scalr and the Actions Button offers further options for each listed EBS Volume. A checkbox is located in the far right column next to each listed volume and can be used to select a Volume for deletion if it is not In-use.
This menu is available under the Actions Column located in the rightmost column next to each individual EBS Volume. From this menu, you can view CloudWatch statistics, attach the volume, change auto-snapshot settings, create a new snapshot, view current snapshots, and delete a selected EBS Volume.
EBS Snapshots are incremental backups. With this Amazon storage feature, only the blocks that have changed since the last created snapshot are saved. For example, if a device has 100 GBs of data, but only 5 GBs of data has changed, only those 5 GBs of the snapshot data are stored back to Amazon S3. If a snapshot is deleted, only unnecessary data for the other snapshots is removed. Active snapshots contain all information needed to restore a volume regardless of what snapshots have been previously deleted. The time required to restore a volume remains the same for every snapshot thus providing the restore time of a full backup and the space savings offered by incremental saves.
EBS Snapshots can also be used to:
- Instantiate multiple new volumes
- Expand the size of a volume
- Move volumes across Availability Zones
An option is supplied to create a new volume based on an existing Amazon S3 snapshot. In that scenario, the new volume begins as an exact replica of the original volume. By optionally specifying a different volume size or a different Availability Zone, this functionality can be used as a way to increase the size of an existing volume or to create duplicate volumes in new Availability Zones. If you choose to use snapshots to resize your volume, you need to be certain your file system or application supports resizing a device. For more information regarding EBS Snapshots, please refer to the Amazon Elastic Block Storage (EBS) page.
To access EBS Snapshot information in Scalr, go to Main Menu > AWS > EBS Snapshots.
A list of all EBS Snapshots will appear in Scalr. From here you can search for a specific snapshot by Keyword or Location and view public (shared) records only. Additional selections are available for refreshing the list and maneuvering between pages.
An Actions Button resides in the details viewer of the Snapshots List after selecting a snapshot. Upon clicking on a snapshot, you will see a menu with the following options:
You can use this menu to create a new volume based on a selected snapshot, copy the snapshot to other EC2 regions, or to Delete a selected snapshot.
Please refer to the following links to learn more: