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From "ASF subversion and git services (JIRA)" <>
Subject [jira] [Commented] (CLOUDSTACK-1191) Implement RBD snapshotting, backups and cloning
Date Fri, 24 May 2013 14:08:42 GMT


ASF subversion and git services commented on CLOUDSTACK-1191:

Commit bef3a2edb7f23035a7d397d2d68caf6cecc0f497 in branch refs/heads/master from Wido den
Hollander <>
[;h=bef3a2e ]

CLOUDSTACK-1191: rbd: Use cloning for deploying templates instead of a copy

RBD format 2 supports cloning (aka layering) where one base image can serve
as a parent image for multiple child images.

This enables fast deployment of a large amount of virtual machines, but it also
saves spaces on the Ceph cluster and improves performance due to better caching.

Qemu-img doesn't support RBD format 2 (yet), so to enable these functions the
RADOS/RBD Java bindings are required.

This patch also enables deployment of System VMs on RBD storage pools. Since we
no longer require a patchdisk for passing the boot arguments we are able to deploy
these VMs on RBD.

> Implement RBD snapshotting, backups and cloning
> -----------------------------------------------
>                 Key: CLOUDSTACK-1191
>                 URL:
>             Project: CloudStack
>          Issue Type: Improvement
>      Security Level: Public(Anyone can view this level - this is the default.) 
>          Components: KVM, Snapshot, Storage Controller, Volumes
>    Affects Versions: 4.2.0
>            Reporter: Wido den Hollander
>            Assignee: Wido den Hollander
>              Labels: ceph, kvm, libvirt, rbd
>             Fix For: 4.2.0
> The current RBD implementation lacks these features.
> The new storage subsystem will allow us to implement these features as described on the

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