File-level backup from NAS, file shares and file servers
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Joined: Oct 21, 2022 3:38 pm

REFS slow backup

Post by avaleksandrov »


We have VBR P20220302 installed on a virtual machine.
Windows Server 2022 21H2

Intel(R) Xeon(R) Gold 6254 CPU @ 3.10GHz

Base speed: 3.10 GHz
Sockets: 32
Virtual processors: 32
Virtual Machine: Yes



Slots used: N/A
Hardware reserved: 0.5 MB

Available 53.1 GB
Cached 15.9 GB
Committed 12.5/73.5 GB
Paged pool 394 MB
Non-paged pool 347 MB
In use (Compressed) 10.7 GB (0 MB)

There is also a physical REFS server.

Windows Server 2022 21H2


Intel(R) Xeon(R) Bronze 3204 CPU @ 1.90GHz

Base speed: 1.90 GHz
Sockets: 2
Cores: 12
Logical processors: 12



Speed: 2133MHz
Slots used: 12 of 24
Form factor: DIMM
Hardware reserved: 1.3 GB

Throughput network capacity of 10GB/s.

But at the same time, the average backup speed is about 263 mb / s.

Jobs are executed via transport mode HotAdd

Target bottleneck

What could be the matter and how to increase the backup speed?
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Posts: 289
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Full Name: Karsten Meja

Re: REFS slow backup

Post by karsten123 »

What about the array configuration of the ReFS volume?
How many disks do you have and what type of disks?
Which RAID controller do you use?
Do you have historical performance metrics out of your monitoring?
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