GCE API for Differential Snapshots
With gcloud, you can take differential snapshots of your instances so you can save space and don't have to take full snapshots all the time.
https://cloud.google.com/compute/docs/disks#snapshots
I have checked the GCE API link and there is no parameter for the source snapshot.
Can the API be used to create a differential snapshot?
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There is no dedicated API to request a differential snapshot. Differential snapshots are automatically taken after the first full snapshot. You don't have to remember which source snapshot to use, and you don't have to worry about making a call with the correct parameters to benefit from differential snapshots. All this will take care of you automatically.
Cheers, Fabrizio.
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