[pve-devel] create snapshots

Alexandre DERUMIER aderumier at odiso.com
Wed Sep 5 10:58:08 CEST 2012


It's working perfectly now !

qm start 100 -stateuri /tmp/snap1 

Thanks :)


----- Mail original ----- 

De: "Dietmar Maurer" <dietmar at proxmox.com> 
À: "Alexandre DERUMIER" <aderumier at odiso.com> 
Cc: pve-devel at pve.proxmox.com 
Envoyé: Mercredi 5 Septembre 2012 10:41:28 
Objet: RE: [pve-devel] create snapshots 

I just upload a fix - please can you test again? 

https://git.proxmox.com/?p=pve-qemu-kvm.git;a=commitdiff;h=e3a988892faa026b88b8ceb61897b7a0753c76a9 

> -----Original Message----- 
> From: Alexandre DERUMIER [mailto:aderumier at odiso.com] 
> Sent: Mittwoch, 05. September 2012 09:17 
> To: Dietmar Maurer 
> Cc: pve-devel at pve.proxmox.com 
> Subject: Re: [pve-devel] create snapshots 
> 
> >>qm start -stateuri <statefile> 
> >> 
> 
> # qm start 115 -stateuri /tmp/snap1 
> cat: write error: Broken pipe 
> 
> 
> same with --incoming "exec:cat /tmp/snap1" 
> 
> 
> is it broken in current qemu? (I never try it before) 
> 
> 
> ----- Mail original ----- 
> 
> De: "Alexandre DERUMIER" <aderumier at odiso.com> 
> À: "Dietmar Maurer" <dietmar at proxmox.com> 
> Cc: pve-devel at pve.proxmox.com 
> Envoyé: Mercredi 5 Septembre 2012 07:58:50 
> Objet: Re: [pve-devel] create snapshots 
> 
> 
> >>The idea is to save the state into an external file. That will work for all 
> storage 
> >>types. 
> Great :) so it'll work for rbd or nexenta :) 
> 
> 
> >>Sorry, I do not understand what you mean? 
> When I have done tests with savevm, the qmp socket timeout each time 
> during the vmstate save. 
> It's also take more time to take than using your vmstate file. (maybe because 
> savevm write the state in the main volume and need to do space inside.). 
> 
> >>qm start -stateuri <statefile> 
> Oh, yes, it should works. (like for migratation with statefile). I'll test that this 
> morning. 
> 
> 
> ----- Mail original ----- 
> 
> De: "Dietmar Maurer" <dietmar at proxmox.com> 
> À: "Alexandre DERUMIER" <aderumier at odiso.com> 
> Cc: pve-devel at pve.proxmox.com 
> Envoyé: Mercredi 5 Septembre 2012 07:50:55 
> Objet: RE: [pve-devel] create snapshots 
> 
> > what is the statefile argument ? 
> > I thinked that the state was saved inside the (first) disk. (so vmstate is 
> > snapshoted and we can rollback it easily) Or it's for doing some tests ? 
> 
> The idea is to save the state into an external file. That will work for all storage 
> types. 
> 
> > I don't know if the vmstate is ok, but it seem faster to take than using the 
> > savevm command. (and also qmp socket don't timeout like with savevm) 
> 
> Sorry, I do not understand what you mean? 
> 
> > When I tried to use loadvm, it complain that state is not available.(So we 
> > need to hack loadvm too to use external statefile) 
> 
> # qm start -stateuri <statefile> 
> 
> should do the trick - but I have not tested that. 
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