Backup concurrency within one VM with multiple disks

[Forza]

Hello,

Is it possible to set concurrency for backing up the individual disks within one VM?
I have set concurrency for backup jobs to 1 but disks within each job are still transferred in parallel.

Example:
Create delta backup once every hour :

The VM has 4 disks assigned and all disks are transferred in parallel, which is eating up unnecessary I/O. The remote storage for the backups is using spinning disks, so concurrent I/O is not optimal.

[olivierlambert]

IIRC, concurrency is indeed per VM, not VM disks. Pinging @julien-f

[Forza]

It would be awesome if this could be addressed in a future release

[julien-f]

Yes, the concurrency setting is per VMs, not per disks.

It's not planned, but I'm keeping it in mind for the current rewrite, maybe we'll be able to expose this.

[julien-f]

@S-Pam Can you create a ticket on our bug tracker please? https://github.com/vatesfr/xen-orchestra/issues/new

[Forza]

@julien-f

Done: https://github.com/vatesfr/xen-orchestra/issues/4490

ghost created this issue in vatesfr/xen-orchestra

closed Allow max concurrency per VDI/disk in backup jobs #4490