Very slow restore jobs

[M4Biz]

Hi.
I've this insfrastructure:

• N. 1 ESXi 7.0 server with some VMs

• N. 1 Veeam Backup & Replication Windows 10 Machine

• N.1 TrueNAS machine

All on the same internal LAN.
If I perform a backup job of one of the VM's hosted on the ESXi server, I get a transfer speed of about 7 MBps and I need only 10 minutes to complete the job.
If I attempt a restore of the entire machine from the TrueNAS to the ESXi host, I get a speed of only a tenth (about 0,7 MBps) and I need about 5 hours to complete the restore job.
Any idea ?
Thanks in advance

[rennerstefan]

Hi

Thanks for your post.
Can you please add some details about the hardware you use?
- Nr. and Type of disks in the NAS
- CPU/RAM and disk configuration of the VBR server
- network connection speed

Thanks

[M4Biz]

Hi rennerstefan.
I'm using :
1) as NAS server a VM machine hosted on the same ESXi server (4 GB Ram)
2) VBR server : Windows 10 machine with 8 GB RAM that is another VM machine but hosted on VMWare workstation (not ESXi) installed on a PC that has: 16 GB Ram, 1 TB M.2 Nvme SSD, AMD Ryzen 7 2700X Eight-Core Processor 3.70 GHz
3) the network speed is 100Mbps (Fast Ethernet)

[rennerstefan]

Thanks for the details.

Overall I would recommend to increase the overall resources in terms of CPU, RAM, Disk and Network you have.
Keep in mind that the OS as well as Veeam use those resources and check the recommendations here: https://helpcenter.veeam.com/docs/backu ... ml?ver=110
You may also want to use the following tool to calculate your required environment: https://vse.veeambp.com/

Furthermore it is highly recommended that you don't store your backups on the same system you are backing up from. As far as I understand you NAS (backup target) is stored on the same ESXi as the source.
As for network, 100Mbit will technically work as you see but min. 1 Gbit/s is recommended as with 100 Mbit you won't get good performance in primary backup anyway due to limitations on VMware and Network side.

Hope that helps.

Thanks

[M4Biz]

Ok. I'll try.
In anyway is it normal that on the same backup infrastructure the backup speed and the restore speed are so different?

[rennerstefan]

no it's not normal to have only a tenth.
but as said it will be very hard to find the bottleneck if resources are already very limited.

[PetrM]

Hello,

At first sight, it looks like a technical issue. I'd say that 10x difference between backup and restore speed is not expected.

@M4Biz
In which transport mode are you running restore and which one is used during backup? Also, you may open a support ticket and ask our engineers to find the "bottleneck" in debug logs. Please don't forget to share a support case ID over here for our reference.

Thanks!