WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-users

Re: [Xen-research] Re: [Xen-users] xm save -c

On Friday, 14 November 2008 at 13:35, Mike Sun wrote:
> The modification to do a checkpoint using the live migration mechanism
> of pre-copying is a trivial one and just something we're benchmarking
> against with our CoW solution.  Here's a patch that changes 'xm save
> -c' to do the checkpoint using the live migration mechanism instead of
> the default way.  Word of warning: it's a hack and I haven't made the
> changes necessary so that the checkpoint file won't contain the pages
> copied during the copy rounds so the checkpoint file will be much
> larger than necessary.
> 
> I'm not sure why a checkpoint with pre-copying mechanism hasn't been
> enabled in Xen yet as the necessary code is all there.

I think it's mostly just that the semantics are a bit weird -- you
don't have a great idea what point in guest time corresponds to the
checkpoint you'll end up with. But we've happily that mode here for
things like coordinated checkpoints.


_______________________________________________
Xen-research mailing list
Xen-research@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/mailman/listinfo/xen-research

<Prev in Thread] Current Thread [Next in Thread>