4. Storage in Pouta

There is at least one type of storage available on every virtual machine: the file system defined by the virtual machine image. This is the primary disk of the virtual machine. In addition, it may have a certain amount of additional local disk space called ephemeral storage in OpenStack terminology defined by the flavor. This storage is visible on the machine as a second hard disk.

This storage is only available for as long as you run the machine. When you terminate the machine, the data is lost. You should not store any persistent data here, and the storage should not be considered reliable. For persistent storage you can use volumes and Object storage which are introduced in Chapters 4.2 and 4.3.

4.1 Ephemeral storage

4.2 Persistent volumes

4.3 Snapshots

4.4 Object Storage

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