[PVE-User] slow backup

Mon Jul 6 12:27:52 CEST 2015

Hi, 

Are you running the last version? Issue: 

pveversion -v 

Could you run a manual vzdump? For example: 

-vzdump $VMID -dumpdir $Your-prefer-destination -bwlimit 0 

Attach vzdump log file and version please. 

Francisco. 

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Today's Topics: 

1. slow backup (Ton?i Stipi?evi?) 
2. Re: Pve 4.0 (Wolfgang Bumiller) 

---------------------------------------------------------------------- 

Message: 1 
Date: Sun, 5 Jul 2015 21:19:49 +0200 
From: Ton?i Stipi?evi? <tonci at suma-informatika.hr> 
To: pve-user at pve.proxmox.com 
Subject: [PVE-User] slow backup 
Message-ID: <55998355.7050405 at suma-informatika.hr> 
Content-Type: text/plain; charset="utf-8"; Format="flowed" 

Hello to all 

I'm using 4xIntelAtom CPU 2558 @2,4GHz on the host 
a backup storages are (1G) freenas nfs and local sata disk 

So classic backup (vzdump) of 32G image takes about 1h ... the same 
result to the nfs storage and to local sata disk 
I tried changing bwlimit in vzdump.conf the result is allways the same 
slow 

But Clone VM takes less then 10 min 

manual lzop backup of this image (nfs storage or sata disk) takes less 
than 10' too ... tar runs same fast 

So we cannot say tha CPU is not capable of doing archiving with 
commpression 

Why is backup so slow and what can I do to optimize it? 

thank you very much in advance and 
BR 

Tonci // 
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Message: 2 
Date: Mon, 6 Jul 2015 06:17:16 +0200 (CEST) 
From: Wolfgang Bumiller <w.bumiller at proxmox.com> 
To: Alexandre DERUMIER <aderumier at odiso.com> 
Cc: proxmoxve <pve-user at pve.proxmox.com> 
Subject: Re: [PVE-User] Pve 4.0 
Message-ID: 
<1254753605.2.1436156236749.JavaMail.open-xchange at ronja.mits.lan> 
Content-Type: text/plain; charset=UTF-8 

I'm not sure what difference that would make for the container though. 
With qemu it would be understandable, but with containers I don't immediately 
see where that would go wrong. 
It works fine on a single system anyway. 
/dev/loop0 3.9G 8.0M 3.6G 1% /mnt/tmp 
changed to 
/dev/loop0 4.8G 8.0M 4.6G 1% /mnt/tmp 

> On July 3, 2015 at 4:38 PM Alexandre DERUMIER <aderumier at odiso.com> wrote: 
> 
> 
> >>-c, --set-capacity loopdev 
> 
> qemu-img resize volume.raw +1G : ok 
> losetup -c /dev/loopx : ok 
> 
> but now, resize2fs is not working inside the container. 
> (so it need to be mounted on the host, so not possible with container online) 
> 
> I'll try to find some infos about this. 
> 
> ----- Mail original ----- 
> De: "Wolfgang Bumiller" <w.bumiller at proxmox.com> 
> ?: "aderumier" <aderumier at odiso.com> 
> Cc: "dietmar" <dietmar at proxmox.com>, "proxmoxve" <pve-user at pve.proxmox.com> 
> Envoy?: Vendredi 3 Juillet 2015 14:20:20 
> Objet: Re: [PVE-User] Pve 4.0 
> 
> > I'm not sure we can do it "online" with loop device on top of raw file. 
> Maybe. 
> 
> From losetup(1): 
> -c, --set-capacity loopdev 
> Force the loop driver to reread the size of the file associated with the 
> specified loop device. 
> 
> Worth a try? 
> 
> On Fri, Jul 03, 2015 at 11:27:04AM +0200, Alexandre DERUMIER wrote: 
> > >> - I saw it not possible to resize disk of an lxc container after 
> > >> creation, is it a restriction ? 
> > > 
> > >We try to implement that later. 
> > 
> > I'm not sure we can do it "online" with loop device on top of raw file. 
> > Offline should be possible. 
> > 
> > For block device (zfs, rbd,..) I think we can resize online. (and snapshot 
> > too) 
> > 
> > 
> > ----- Mail original ----- 
> > De: "dietmar" <dietmar at proxmox.com> 
> > ?: "proxmoxve" <pve-user at pve.proxmox.com>, "J?r?my Carnus" 
> > <jeremy at jcarnus.fr> 
> > Envoy?: Mercredi 1 Juillet 2015 21:17:33 
> > Objet: Re: [PVE-User] Pve 4.0 
> > 
> > > - I saw it not possible to resize disk of an lxc container after 
> > > creation, is it a restriction ? 
> > 
> > We try to implement that later. 
> > 
> > > - Trying to migrate a vz container to a lxc container using backup / 
> > > restore leads me to a "TASK ERROR: Insecure dependency in unlink while 
> > > running with -T switch at /usr/share/perl5/PVE/Tools.pm line 187." when 
> > > restoring the zip archive in the pve4.0 
> > 
> > Migration is currently not implemented, but we plan to implement (offline) 
> > migration soon. 
> > 
> > _______________________________________________ 
> > pve-user mailing list 
> > pve-user at pve.proxmox.com 
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> > 
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> 

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