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From Simon Weller <>
Subject Re: Snapshots only on Primary Storage feature
Date Thu, 17 May 2018 15:10:40 GMT

This feature was implemented in 4.9 by my colleague Nathan Johnson.  You enable it by changing
the global setting  snapshot.backup.rightafter to false.

The PR is reference here:

We have the exact same use case as you, as we also use Ceph.

- Si

From: Glen Baars <>
Sent: Thursday, May 17, 2018 9:46 AM
Subject: Snapshots only on Primary Storage feature

Hello Devs,

I have been thinking about a feature request and want to see what people think about the use

We use KVM + Ceph RBD as storage.

Currently, when a client takes a snapshot, Cloudstack takes a Ceph snapshot and then uses
qemu-img to export to secondary storage. This creates a full backup of the server. Clients
want to use this as a daily snapshot and it isn’t feasible due to the space requirements.

We would like create the snapshot only on primary storage. It is replicated offsite and fault
tolerant. I can see that the download snapshot and create template features may be an issue.

I have seen the below features in the recent releases and wondered if this was the direction
that the development was going.

Separation of volume snapshot creation on primary storage and backing operation on secondary

Bypass secondary storage template copy/transfer for KVM.

Kind regards,

Glen Baars

BackOnline Manager

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