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Re: [Qemu-devel] [RFC PATCH 0/3] Point-in-time snapshot exporting with d

From: Stefan Hajnoczi
Subject: Re: [Qemu-devel] [RFC PATCH 0/3] Point-in-time snapshot exporting with drive-backup
Date: Thu, 27 Jun 2013 10:17:50 +0200
User-agent: Mutt/1.5.21 (2010-09-15)

On Wed, Jun 26, 2013 at 03:31:19PM +0800, Fam Zheng wrote:
> On Wed, 06/26 09:23, Paolo Bonzini wrote:
> > Il 26/06/2013 05:59, Fam Zheng ha scritto:
> > This leads to another observation: a sync:'none' block-backup job
> > probably should never complete, and should instead go on until explicit
> > cancellation.  This is because the job does no background writes, and
> > thus completion would only happen after the guest has written the whole
> > disk.  Writing the whole disk is rare enough that it will likely cause
> > bugs in the clients.  It is easier just to never complete the job.
> > 
> Yes, the sync mode none will simply run forever until cancelled.

There is a dedicated command to successfully complete a job:



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