Active Backup Restore speed

[MatrixSmith]

Hi all,

I am using ABB for quite a while now, but never really needed to use the restore function. I've always only needed a couple files.....

I'm currently trying to restore a whole disk (1.7TB of data). It's going, but i don't see speed of more than 32 MB/s.

I do have 10Gbit NIC in my server as well as in my DS1816+ and going thru a Cisco 10Gb network switch.

Needless to say that at an average of 15MB/s, restoring 1,7TB is gonna take some time......

Do you guys have any idea why it would not go any faster???

Thanks

 

[Rusty]

What kind of restore is it?

 

[MatrixSmith]

What kind of restore is it?

Hi Rusty,

It's a volume backup

 

[Rusty]

Hi Rusty,

It's a volume backup

so a "bare-metal" restore then? On a machine or a VM?

 

[MatrixSmith]

so a "bare-metal" restore then? On a machine or a VM?

Well, it's a Windows Server 2019 Virtual Machine running in QEMU/KVM on an Ubuntu Machine. Although it's a VM, it's not being backed up as a VM. It's considered a physical machine in ABB

 

[Rusty]

Fair point. So it's using an agent to back up and you are doing a "baremetal" restore inside a VM machine.

Guess that will depend on a few things now. Communication to your NAS, drives in your NAS, array type, how powerfull is that hypervisor host etc.

 

[MatrixSmith]

I don't think it's a physical bottleneck as I've ran a CrystalDiskMark and i had the following results

------------------------------------------------------------------------------
CrystalDiskMark 7.0.0 x64 (C) 2007-2019 hiyohiyo
                                  Crystal Dew World: https://crystalmark.info/
------------------------------------------------------------------------------
* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes

[Read]
Sequential 1MiB (Q=  8, T= 1): 11216.370 MB/s [  10696.8 IOPS] <   746.00 us>
Sequential 1MiB (Q=  1, T= 1):  4610.582 MB/s [   4397.0 IOPS] <   226.67 us>
    Random 4KiB (Q= 32, T=16):  1097.464 MB/s [ 267935.5 IOPS] <  1801.07 us>
    Random 4KiB (Q= 32, T= 1):   707.405 MB/s [ 172706.3 IOPS] <   183.69 us>

[Write]
Sequential 1MiB (Q=  8, T= 1):  4967.211 MB/s [   4737.1 IOPS] <  1564.66 us>
Sequential 1MiB (Q=  1, T= 1):  2856.202 MB/s [   2723.9 IOPS] <   366.15 us>
    Random 4KiB (Q= 32, T=16):   455.279 MB/s [ 111152.1 IOPS] <  4217.76 us>
    Random 4KiB (Q= 32, T= 1):   453.068 MB/s [ 110612.3 IOPS] <   288.73 us>

Profile: Default
   Test: 1 GiB (x5) [Interval: 5 sec] <DefaultAffinity=DISABLED>
   Date: 2021/04/20 16:31:43
     OS: Windows Server 2019  [10.0 Build 17763] (x64)

Also, backup speed goes well in excess of 250MB/s. Even Sometimes exceed 350MB/s.

I understand restoring would take longer but i feel like 15MB/s is quite slow....

NAS Config:
6 times 4TB WD4003FFBX-68MU3N0 RED PRO, SHR with 2 drive fault tolerance (Healthy as of now), btrfs. Single 14TB volume.

Ubuntu 18.04 LTS Host:
Intel Core i7-9700K 8 cores @ 3.60GHz
64GB 2666MHz DDR4 RAM
Some mid performance SSD

Only Guest OS Running:
Windows Server 2019
6 cores allocated,
32GB of ram
C drives is a qcow2 virtio on physical SSD
D Drive (the one I'm restoring) 3TB qcow2 Virtio on a 6TB Exos Enterprise HDD.

 

[Rusty]

Guess the HW element is not the bottleneck then