[pve-devel] qemu 7.0 : fleecing backup (aka: local temp write cache"

[DERUMIER, Alexandre]

Le 31/07/22 à 19:47, Laurent GUERBY a écrit :

On Sun, 2022-07-31 at 16:49 +0000, DERUMIER, Alexandre wrote:


Le 31/07/22 à 18:19, Dietmar Maurer a écrit :


This is really a blocker for me,I can't use pbs because I'm using
nvme
is production, and a 7200k hdd backup in a remote 200km site with
5ms
latency.



Why don't you use a local(fast) PBS instance, then sync to the slow
remote?




Hi Dietmar.

Can I use a small local fast PBS instance without need to keep the
full
datastore chunks ?

I have 300TB nvme in production, I don't want to buy 300TB nvme for
backup.

I known that I can keep more retentions on remote storage slow, but
what
about the local fast pbs ?




Hi Alexandre,

I had the exact same issue:

https://antiphishing.cetsi.fr/proxy/v3?i=SGI0YVJGNmxZNE90Z2thMFYLWSxJOfIERJocpmb73Vs&r=SW5LV3JodE9QZkRVZ3JEYYKpfBJeBDlAX9EWSgcxKTOskC-MKbYiKWCY7M6ocEtDq8CeXBnAzGsMk-U5K5P6Yg&f=bnJjU3hQT3pQSmNQZVE3aO0r-ZB14cskqerzYUDW5Vk-5C50pA9QKkzP7UNmmVTG&u=https%3A//forum.proxmox.com/threads/partial-sync-job-pre-prune.106441/&k=dFBm

Here is the bugzilla:

https://antiphishing.cetsi.fr/proxy/v3?i=SGI0YVJGNmxZNE90Z2thMFYLWSxJOfIERJocpmb73Vs&r=SW5LV3JodE9QZkRVZ3JEYYKpfBJeBDlAX9EWSgcxKTOskC-MKbYiKWCY7M6ocEtDq8CeXBnAzGsMk-U5K5P6Yg&f=bnJjU3hQT3pQSmNQZVE3aO0r-ZB14cskqerzYUDW5Vk-5C50pA9QKkzP7UNmmVTG&u=https%3A//bugzilla.proxmox.com/show_bug.cgi%3Fid%3D3701&k=dFBm

So no AFAIK there's no way to do a partial sync. A tool to sync a
specific backup (instead of a group) and a bit of scripting would do
the job.

Sincerely,

Laurent

Hi Laurent !

I think that my need is a little bit different.

looking at your forum message

"have it sync to our current existing primary PBS server (SSD). The NVME server will have less space than the SSD server and not enough space to have a copy of all backups of the primary,"


I think It's not the same. I need the inverse.  My primary storage need to be fast and small, and secondary synced remote is big && slow.









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