Verification speed

[sander93]

Hello,

I have a question, i read from @tuxis they reach around 2GB/s read speed for verify
https://forum.proxmox.com/threads/pbs-scaling-out-storage.97785/#post-430819

The also use normal disks with special devices, just like our situation.

12 x 7200 RPM 8 TB disk (RaidZ2)
2 x 960 GB Enterpise SSD as special device

Our verification is very slow i think, around 20/30M, see also screenshot
This takes around 3 days normally (35.6 TiB in use)

Is there something we overlooked? Or a setting to improve?

Thank you!

 

[tuxis]

We use RAID10, not RAIDZ2. Maybe that causes some major difference? Also, our disks are SAS, not SATA, and we use NVME, not SSD.

 

[sander93]

Ah oké that explains, some difference. thank you.

 

[Dunuin]

12 x 7200 RPM 8 TB disk (RaidZ2)

That basically means you got the IOPS of a single HDD. In any raidz IOPS won't scale with the number of disks.

Using a striped 3-way-mirror like tuxis did you would get 4 times the IOPS performance but loose 60% of your capacity.
Using a striped 2-way-mirror you get 6 times the IOPS but loose 40% of your capacity.

So you need to decide if you want good capacity or good performance.