[openstack-dev] [nova][cinder] non-persistent storage(after stopping VM, data will be rollback automatically), do you think we shoud introduce this feature?

Yuzhou (C) vitas.yuzhou at huawei.com
Tue Mar 4 02:00:40 UTC 2014

Hi stackers,

As far as I know ,there are two types of storage used by VM in openstack: Ephemeral Storage and Persistent Storage.
Data on ephemeral storage ceases to exist when the instance it is associated with is terminated. Rebooting the VM or restarting the host server, however, will not destroy ephemeral data.
Persistent storage means that the storage resource outlives any other resource and is always available, regardless of the state of a running instance.

There is a use case that maybe need a new type of storage, maybe we can call it non-persistent storage .
The use case is that VMs are assigned to the public ephemerally in public areas.
After the VM is used, new data on storage of VM ceases to exist when the instance it is associated with is stopped. 
It means stop the VM, Non-persistent storage used by VM will be rollback automatically.

Is there any other suggestions? Or any BPs about this use case?


Zhou Yu

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