[pve-devel] [PATCH 1/3] add live storage migration with vm migration

[Wolfgang Bumiller]

> On October 19, 2016 at 9:26 AM Alexandre DERUMIER <aderumier at odiso.com> wrote:
> 
> 
> >>What about the suggestion from Wolfgang: "make drive-mirror write to both disks"
> >>(local and remote)
> >>
> >>I guess that would solve the whole problem?
> 
> Do you mean, keep the drive-mirror running (no block-job-complete), then do the vm live migration,
> 
> and after vm live migration (just before unpause target, and stop sourvm), do the block-job-complete 
on source vm ?

Exactly, the disk should basically be in a RAID-1 mode during the entire migration process.
Note that this might be incompatible with post-copy mode as with that the remote side
takes over early and would have to mirror its writes back to the source (iow. the remote
side would also have to be in a drive-mirror mode except it only has one disk, so I doubt
that's possible/implemented).

> ----- Mail original -----
> De: "dietmar" <dietmar at proxmox.com>
> À: "Wolfgang Bumiller" <w.bumiller at proxmox.com>, "aderumier" <aderumier at odiso.com>, "pve-devel" <pve-devel at pve.proxmox.com>
> Envoyé: Mardi 18 Octobre 2016 17:40:35
> Objet: Re: [pve-devel] [PATCH 1/3] add live storage migration with vm migration
> 
> > The only think: 
> > 
> > I still don't known how to manage the case of target node crash after the disk 
> > are migrate, but vm still on source node. 
> 
> 
> What about the suggestion from Wolfgang: "make drive-mirror write to both disks" 
> (local and remote) 
> 
> I guess that would solve the whole problem? 
> 
>