[one-users] suspend vs stop

[Shi Jin]

Sorry, I didn't read the documentation very carefully. 
Now I found this about the status:
stop (virtual machine state is transferred back to OpenNebula for a possible reschedule)
suspend (virtual machine state is left in the cluster node for resuming)

So I understand the difference. For the stopped one, I do find the image file in the var directory (I am using nfs so it simply didn't delete the images directory after onevm delete"). But I am still confused on how to use to "onevm stop".
Is it only useful in the following sequence?
* use the VM and change its contents.
* shutdown the VM in the OS
* onevm stop
* onevm delete
* The reuse the image file
This way I get a updated image file for the VM.

Other than the above scenario, I cannot think of any use of it. If that is the case, why wouldn't "stop" combine "delete" into it?
I am sure I am missing something important.

Shi
--
Shi Jin, PhD


--- On Tue, 9/1/09, Shi Jin <jinzishuai at gmail.com> wrote:

> From: Shi Jin <jinzishuai at gmail.com>
> Subject: [one-users] suspend vs stop
> To: users at lists.opennebula.org
> Date: Tuesday, September 1, 2009, 9:30 PM
> Hi there,
> 
> I understand that "onevm suspend" saves the VM and its
> memory into
> files and frees the CPU and memory, which can be later
> resumed by
> "onevm resume".
> However, I also noticed there is "onevm stop". I tried it,
> the status
> turns first to save and then to stopped. The CPU and memory
> seems to
> be released as well. However, I could not find out how to
> reactivate
> the VM. I tried "onevm resume" on it but the status only
> changed to
> "pending".
> 
> My questions:
> 1. How to reactivate a stopped VM?
> 2. What is the difference between a suspend and stop?
> 
> Thank you very much.
> BTW, I am using open nebula 1.3.8 and KVM hypervisor.
> 
> -- 
> Shi Jin, Ph.D.
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