Unraid as VMWare ESXi Virtual Machine Performance?


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I wanted to move my bare metal Unraid installation to an Esxi 7 virtual machine, i have the instructions on how to do so but was really wondering what the performance is like.

 

Can some users that have been running Unraid in a virtual machine share their experiences and rough performance stats. This would be greatly appreciated Thank You!

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Running Unraid under ESXi 6 for quite a few years. It's been rock solid. I haven't done any scientific performance measurements iron vs. VM but have not seen any performance issues.

One small oddity that I haven't fully investigated is what appears to be high CPU usage sometimes when an array drive spins up from standby. Not consistently reproducible and not a real issue so haven't taken the time.

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Thanks for the responses, i successfully installed UNRAID on ESXi 7. It is working now the only major issues is i noticed my speeds have dropped when transferring files.

 

Before i was getting approx 130 write max and read. Now i only get about 75 Writing to the cache drive and only 30 when reading directly from the array. Can anyone please help me with this issue ?

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1 hour ago, 1da said:

Thanks for the responses, i successfully installed UNRAID on ESXi 7. It is working now the only major issues is i noticed my speeds have dropped when transferring files.

 

Before i was getting approx 130 write max and read. Now i only get about 75 Writing to the cache drive and only 30 when reading directly from the array. Can anyone please help me with this issue ?

 

Did you pass through  your controllers, or did you assign virtual disks?  Those are ridiculous speeds.

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Hi StevenD,

 

So for my unraid VM, i have the H310 (IT MODE),  2 x NVME drives, USB 3 controller, Quadro P2000, and a Quad Port Intel NIC all passed through to the unraid VM. I also have all 4 ports on the NIC connected to UNRAID and bonded running Link Aggregation 802ad which is also enabled on my switch. (My Ethernet MTU is 9000, which is also enabled on the switch)

 

My main concern is coping files to the array and the extremely slow speed of 20 - 30 mb/s MAX. I can provide more information about my setup if required to help troubleshoot.

 

Thank you for your time and viewing my post, this issue is bothering me so much!

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I wouldn't pass through a NIC.  I get almost full 10GbE speeds using the virtual NIC.  I can write to cache at over 800MB/s and 130-150MB/s to the array directly.

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So I ended up trying it out. I removed my nic passthrough entirely and added one virtual nic. Tested a file transfer coping from the array to a windows server and I got a max of 14mbps.

Sent from my GM1900 using Tapatalk

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Hey so i set the MTU to default and tested with iPerf3, this test is using only the 1 virtual NIC, previously i did a iperf test with my pass through NIC bonded and i got approx 800 mbps to another hard wired computer which is how i test the file transfers as well.

 

This time i got over 150 mb/s with just 1 virtual NIC so that should not be the bottle neck. Screenshot below.

 

1736917987_ScreenShot2021-05-20at11_47_33AM.thumb.png.5f48e70fa1f4eeb83078a9a534112a9e.png

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@1da are your network 1Gbe? if yes, then ~200Mbit is really crap speed.. when i was on ESXi, and now on proxmox, i'm getting > 9Gbit on 10Gbit network - all default settings with one virtual nic with VMXnet3 Adapter type.

so, looks like you need to resolve your network problems first...

 

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The only thing I have changed is converted Unraid to a VM when my speeds became slower. My network cannot be the bottleneck in this situation even if it is slower then normal.

I'm trying to figure out how I can achieve normal read and write speeds to my Unraid vm. If you know any other troubleshooting steps I can take to understand why my SMB transfers are extremely slow that would be helpful.

Thank you!

Sent from my GM1900 using Tapatalk

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Sorry I didn't answer that part, yes my network is a 1GBE network. I will follow your link and perform a iperf speed test on esxi with unraid and get back to you.

Thank you for your response!

Sent from my GM1900 using Tapatalk

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So to update you guys I ended up grabbing a dedicated ESXi box and left my Unraid to it's own dedicated hardware. Thank you all for the help, I think I will test another Unraid build in a VM before I decide to migrate my main box again.

Sent from my GM1900 using Tapatalk



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