[openstack-dev] [Discussion] Different types of snapshots

Duncan Thomas duncan.thomas at gmail.com
Wed Jun 12 15:32:24 UTC 2013


On 12 June 2013 13:27, Kashyap Chamarthy <kchamart at redhat.com> wrote:

>> A point of contention for a number of folks is that currently the base
>> implementation is such that the snapshot is dependent on the source volume,
>> but not all back-ends require this.
>
> To be fair, each snapshot-type has its use-case.
>
> Isn't the whole point of snapshot is a point in time to quickly revert to a known sane
> state, so depending on source is okay, I believe.
>
> Maybe what you mean is a "clone".

You're walking into the middle / end of a long discussion here, but a
clone is different to a snapshot in that a snapshot is immutable. This
is a very useful property for certain usecases (e.g. golden images)



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