Slow VTL backups using Veeam and Starwind VTL on Azure

StarWind VTL, VTL Free, VTL Appliance

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marciofeld
Posts: 7
Joined: Wed Oct 24, 2018 4:01 pm

Wed Oct 24, 2018 4:11 pm

Hi,
I have a Veeam B&R Infrastructure on premisses. I deployed an Azure VM with 8 vCPUs, 16 GB Memory and Premium SSD disks and installed Starwind VTL for evaluation porpuses.
I have a 200 Mbps dedicated Azure ExpressRoute connection between my Datacenter and my Azure Infrastructure.

I am experiencing performance problems when trying to write VTL Tapes using Veeam. The tape writing rates never go beyond 11 MB/s.
On some tests, I transmit data directly from my on premisses Veeam Repository, and on other tests, I create a Veeam Backup Copy to a local disk on my Starwind VTL VM on Azure, but the performance bootleneck is always the target (the tape drive).

Could someone help me to improve the write performance?
Oleg(staff)
Staff
Posts: 568
Joined: Fri Nov 24, 2017 7:52 am

Fri Oct 26, 2018 12:27 pm

What StarWind build are you using?
Please make sure you are running the latest StarWind build.
marciofeld
Posts: 7
Joined: Wed Oct 24, 2018 4:01 pm

Sun Dec 09, 2018 1:27 am

After lots of troubleshooting, I was able to identify and correct the issue.
I'm running the latest version of Starwind VTL.
The issue is that Azure VM disks are very very slow!!! I could manage that using Windows Storage Spaces. I created a Striped Storage Pool using a group of disks. This setting helped to increase the volume throughput and IOPs, and now my VTL backups are running much faster.
Boris (staff)
Staff
Posts: 805
Joined: Fri Jul 28, 2017 8:18 am

Sun Dec 09, 2018 7:48 am

Thanks for sharing the solution. It may be useful for other community members.
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