Discussions specific to the VMware vSphere hypervisor
Post Reply
Posts: 19
Liked: never
Joined: Feb 25, 2016 1:49 am
Full Name: Johnson Ng

VBR Proxy Transport mode

Post by Johnson » Jun 28, 2019 3:01 pm

Dear community,

My environment:
- Nutanix hardware
- ESXi as a Hypervisor
- Veeam VBR 9.5U4 as a VM.
- NFS3 datastore
- Network is on a 10G infra.

I would like to check which Transport mode is of the best performance.
- Direct Access Storage
- Virtual Appliance (Hot add)

By far, from what I have googled, I should be using "Direct Access Storage". However, the speeds were way slower than when the transport mode is set to "Virtual Appliance"

These are the speeds which I observed for each transport mode:
1. Virtual Appliance (Hot add): 280+MB/s
2. NBD: 76 MB/s
3. Direct Access Storage: 20 to 30+ MB/s

I cannot use the "Hotadd" transport mode because of the VM stun issue (Upon snapshot removal, VM is un-pingable for about 10 seconds or so).

For #2 and #3, is this normal? The number doesnt seems normal to me on a 10G infra.

Veeam Software
Posts: 5439
Liked: 738 times
Joined: Sep 01, 2014 11:46 am
Location: Austria

Re: VBR Proxy Transport mode

Post by HannesK » Jul 01, 2019 8:11 am

2, maybe normal, 3 should be significantly faster. I suggest to ask support for performance investigations. Direct NFS should be much faster than what you see.

The issues with HotAdd are expected. HotAdd with NFS is not recommended (see best practice guide)

Best regards,

Posts: 208
Liked: 28 times
Joined: Apr 26, 2013 4:53 pm
Full Name: Dan Swartzendruber

Re: VBR Proxy Transport mode

Post by danswartz » Jul 03, 2019 6:54 pm

If #3 is writing to an NFS store, you may be running afoul of some kind of synchronous write issue?

Post Reply

Who is online

Users browsing this forum: No registered users and 31 guests