[pbs-devel] Chunk verification speedup discussion, similar speedup opportunities elsewhere

[Fabian Grünbichler]

On July 25, 2025 1:23 pm, Adam Kalisz wrote:
> Hi list,
> 
> I missed whether the chunk verification speedup when loading chunks got
> applied or whether it was somehow included in the S3-like storage
> option change set.

https://lore.proxmox.com/pbs-devel/20250707132706.2854973-1-d.csapak@proxmox.com/

hasn't been applied (and probably needs a rebase post-S3 ;))

> In
> https://forum.proxmox.com/threads/abysmally-slow-restore-from-backup.133602/page-7
> we have discussed some other opportunities for speedup using similar
> patterns. People mentioned LXC container restore speed and  host-based
> backup restore, which looking at the code for the latter seems like a
> similar async loop pattern would bring some improvement without too
> much trouble:
> 
> https://github.com/proxmox/proxmox-backup/blob/4940514b0f05d6cd6a5f711edfdd47c1fa41b537/proxmox-backup-client/src/main.rs#L1109

that's not the code path for container/host backups, that's the code
path for fixed-size indices like vm backups, but just dumping to a file
instead of via qmrestore.. i.e., nothing that is used by PVE or users
usually, but can still be improved of course ;)

> Similarly the sync performance between two Proxmox Backup Servers and
> live-migration got mentioned in various places.

do you mean live-restore here? live migration has nothing to do with
PBS..