[PVE-User] pve-user Digest, Vol 157, Issue 12

Oleksii Tokovenko atokovenko at gmail.com
Mon Apr 12 00:43:38 CEST 2021


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нд, 11 квіт. 2021 о 13:00 <pve-user-request at lists.proxmox.com> пише:

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> Today's Topics:
>
>    1. Re: Revisited: External disk backup using PBS - Requesting
>       Criticism/Advice? (Lindsay Mathieson)
>    2. PBS Incremental and stopped VM's (Lindsay Mathieson)
>    3. Re: PBS Incremental and stopped VM's (Arjen)
>    4. Re: PBS Incremental and stopped VM's (Lindsay Mathieson)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 10 Apr 2021 23:28:50 +1000
> From: Lindsay Mathieson <lindsay.mathieson at gmail.com>
> To: pve-user at lists.proxmox.com
> Subject: Re: [PVE-User] Revisited: External disk backup using PBS -
>         Requesting Criticism/Advice?
> Message-ID: <e92b8b56-e89f-928d-a3c8-7b423e334cf5 at gmail.com>
> Content-Type: text/plain; charset=windows-1252; format=flowed
>
> On 10/04/2021 5:10 pm, Arjen via pve-user wrote:
> > Don't expect to be able to backup the PBS container with 4TB to a 2TB
> external drive.
>
> I only passed 2TB through and the actual backup data comes to 1.3TB
>
> >   The Datastore of a PSB does not compress much further and Proxmox VE
> Backup will only backup virtual disks and not mountpoints or storages
> passed from host, if I understand correctly.
>
>
> I wondered that. Will be testing.
>
> > I suggest adding a virtual disk of 2TB to the PBS container (and format
> it with ext4) which can be backed up by the Proxmox VE Backup.
>
>
> Certainly a possibility.
>
>
> I also wondered if it was practical to attach an external disk to PBS as
> a Datastore, then detach it. A bit more manual, but doable.
>
>
> > I would also run the PBS container (with virtual disk) on the cluster
> instead on separate hardware which is a single point of failure. The local
> PBS would be then just as reliable as your cluster.
>
>
> I want to keep the storage separate from the cluster, in that regard the
> local storage is a single point of failure, hence the need for offsite
> storage as well :)
>
>
> >
> > Regarding safeness: I suggest doing a automated disaster recovery every
> week to make sure it works as expected. Or at least partially, like
> restoring the PBS from an external drive.
>
>
> I'll definitely be testing restore options to check that it works.
>
> > Regarding practicality: I would have a remote PBS sync with your local
> PBS instead of moving physical disks (but you mentioned before that that
> was not really possible).
>
>
> Alas :(
>
>
> Perhaps I could do a backup on site, then physically move it offsite and
> attach it to a offsite PBS server and then sync it remotely -
> incremental backups over the net would be doable.
>
>
> nb. Our NAS died, hence my increased investigation of this :) Definitely
> want to go with a more open and targeted solution this time, the NAS was
> a good appliance, but inflexible.
>
> Thanks!
>
> --
> Lindsay
>
>
>
>
> ------------------------------
>
> Message: 2
> Date: Sat, 10 Apr 2021 23:36:23 +1000
> From: Lindsay Mathieson <lindsay.mathieson at gmail.com>
> To: pve-user at lists.proxmox.com
> Subject: [PVE-User] PBS Incremental and stopped VM's
> Message-ID: <ddef627d-5c5f-1358-4a9f-196ef5868e6e at gmail.com>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> I'm guessing only running VM's (with dirty bitmap support) can be
> incrementally backed up?
>
>
> Might be nice if we could schedule backups for only running VM's
>
> --
> Lindsay
>
>
>
>
> ------------------------------
>
> Message: 3
> Date: Sat, 10 Apr 2021 13:43:43 +0000
> From: Arjen <leesteken at protonmail.ch>
> To: Proxmox VE user list <pve-user at lists.proxmox.com>
> Subject: Re: [PVE-User] PBS Incremental and stopped VM's
> Message-ID:
>
> <yl4Q_yt8NBMZUuS35KwBK-5RtAEv6V0dJTE77Hp8lW3GAxzIAOU2ErfF0CMHI9y8NjUQKF5TBtgSGhQIaE3p5Sy-7ltAFX8NmbZJoSyHVAk=@
> protonmail.ch>
>
> Content-Type: text/plain; charset=utf-8
>
> On Saturday, April 10th, 2021 at 15:36, Lindsay Mathieson <
> lindsay.mathieson at gmail.com> wrote:
>
> > I'm guessing only running VM's (with dirty bitmap support) can be
> >
> > incrementally backed up?
> >
> > Might be nice if we could schedule backups for only running VM's
>
> Just to be clear: PBS always makes a full backup. The resulting data is
> deduplicated (before sending it to the server), which almost always reduces
> the writes to the server. An administration of changed virtual disk blocks
> is kept for running VMs, which only reduces the reads from VMs that have
> not been restarted between backups. It data transfer over the network is
> the bottleneck, you will have most benefit from the former (less changes,
> less transfers). The latter only speeds up the backup due to less reads (of
> unchanged data) from disk.
>
> best regards, Arjen
>
>
>
> ------------------------------
>
> Message: 4
> Date: Sun, 11 Apr 2021 00:06:19 +1000
> From: Lindsay Mathieson <lindsay.mathieson at gmail.com>
> To: pve-user at lists.proxmox.com
> Subject: Re: [PVE-User] PBS Incremental and stopped VM's
> Message-ID: <90b0f7df-ca15-f9cd-b76a-0f8f26e24917 at gmail.com>
> Content-Type: text/plain; charset=windows-1252; format=flowed
>
> On 10/04/2021 11:43 pm, Arjen via pve-user wrote:
> > Just to be clear: PBS always makes a full backup. The resulting data is
> deduplicated (before sending it to the server), which almost always reduces
> the writes to the server.
>
> Ah, I see now, thanks, I didn't understand that part of things. Looking
> at the logs of my 2nd backup, I see that stopped VM's had zero bytes
> written to the backup server.
>
> --
> Lindsay
>
>
>
>
> ------------------------------
>
> Subject: Digest Footer
>
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> ------------------------------
>
> End of pve-user Digest, Vol 157, Issue 12
> *****************************************
>
>

-- 
С уважением,
Токовенко Алексей Алексеевич


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