really slow restore from HDD pool

[waltar]

Zfs special device "effect" comes on garbage collection, prune, verify runs.

 

[carl0s]

Zfs special device "effect" comes on garbage collection, prune, verify runs.

I know, you did say so earlier, but prior to that, everybody else is telling me that my HDDs are the reason this is performing a bit below my hopes.

Now, when I look at the data overall:
inside the guest, there is 550GB used on the two virtual disks.
A full backup is taking up 175GiB on PBS (big texty SQL databases..)

Restoring 550GB in 19 minutes is pretty good I suppose.

Anyway I will carry on testing other filesystems etc. It still seems odd to me that the network is barely being used beyond 1.25Gbps (175GiB read in 19 minutes)

 

[carl0s]

I believe I am being held up by pbs-restore being single threaded. I see it pegged at 100% on the PVE host.. :-/

 

[carl0s]

Backup of same VM to ext4 on SAS12 SSD: 16m 10s
Restore: 19m 9s