Slow Backup to CIFS NAS - iSCSI NAS - ?

[Wad4iPod]

Greetings,
I have a number of Veeam BUR deployments.
NAS Devices are Synology 1512+, 1513+, Drobo B800i, OPEN Filer (NFS)
Deployments vary from ESXi 4 > ESXi 5.5. Some are vCenter connected and some are stand alone ESXi Hosts.

Most VEEAM installations are done on a VMWare Guest. Some are Windows 7 x64 Pro, Windows 2008(R1) x64, Windows 2008 R2, Physical Veeam servers are Windows 2008 R2.

Nearly, if not all - backups are VRB w/o Active fulls.

What I am seeing is this:
VEEAM Guests that are VM's and backup themselves run between 30 > 50 MB/s.

Other Guests run about 2 > 10 MB/s.

One Physical VEEAM server backs up some VM Guests daily and the speeds 2MB/s. However, the same job configuration in a different weekly run seems to go at 45 MB/s.

Target is bottle neck.
I thought I might have found hotadd vs. NBD mode might be an issue. Turns out that NBD is being used on some jobs that run slow 2 MB/s.

Thanks for any help.

[Gostev]

I thought I might have found hotadd vs. NBD mode might be an issue. Turns out that NBD is being used on some jobs that run slow 2 MB/s

That is correct (except when you have 10 Gb Ethernet).

[Wad4iPod]

Thank you Gostev.
Are you saying the 2MB/s performance is to be expected in (all?) the backup scenarios outlined above?

[Vitaliy S.]

VEEAM Guests that are VM's and backup themselves run between 30 > 50 MB/s.

Other Guests run about 2 > 10 MB/s.

Can you post full bottleneck stats? Yes, with physical server, most likely network is the weakest part, while with hotadd everything is limited by your target storage.

[Wad4iPod]

These are VEEAM v8

[Vitaliy S.]

Try switching for forever incremental backup mode (not reversed), as it provides less load on the destination target, which seems to be the "weakest" component here.

[foggy]

In case of CIFS backup repository, also make sure it is located close to the server that is running target Veeam data mover agent (either backup server or dedicated proxying server, if configured).

[Wad4iPod]

Problem is I have multiple site installed this way.
Sending smaller amounts of data works - but doesn't resolve. Flat file copies to and from the backup targets are very fast.

Multiple targets that exhibit the same slowness.

[Vitaliy S.]

Try choosing different destination target to verify that target NAS boxes are, indeed, bottlenecks.