Slow vmware backups

[ManuelRighi]

Hello,
I have physical server as Veeam Backup server, with Windows 2012 R2.
This server have 16Gb of memory, CPU with 8 core. The repository for Veeam backups is local disk (12 SAS HD with Raid 50).
The VMware backup proxy (only one), is this physical server.

My problem is slow backups.
The bottleneck is Source, the Processing rate is 60/70 MB/s.

I have 3 ESXI nodes (vsphere 5.5), with one Shared Storage (HP P2000).
My Storage performs better than 60/70 MB per second.

How can I improve performance?
Add a virtual machine (or mnore than one ...?) as a backup proxy veeam ?

Tnx in advanced
Manuel

[Gostev]

Hi, Manuel

Is your Veeam Backup server connected into the SAN fabric?
Direct SAN access will significantly improve backup performance.

Thanks!
Anton

[ManuelRighi]

Veeam Backup server is connected to ethernet gigabit switch. Switch is connected to esxi host. Each esxi host is connected to Shared Storage with SAS cable.

[Gostev]

This means you are using Network processing mode (see sticky VMware FAQ on all processing modes). This is the least optimal processing mode for 1Gb ethernet. However, since you only have 1Gb link to your backup repository anyway, you can try to improve performance by increasing maximum concurrent tasks on your default backup proxy and repository, and this should helps to saturate 1Gb.

If this does not help, the next step would be to create an additional backup proxy in a Windows VM running on one of those hosts.

Thanks!