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HOW TO MIGRATE A HYPER-V MACHINE (SERVER) TO A PHYSICAL COMPUTER
Posted by alvarovelasco on Feb 16th, 2024 at 7:25 PM
Needs answer
Server Hardware Desktop Virtualization Virtualization
Hi team,
I have a server running under Hyper-v, but for some reason the performance is
not the best, I run a SQL database with a ERP (Softland), and that is all, but
the users constantily aks for low performance with this app.
The machine is running under HP Server with 4 Quores, 32 Gb RAm and SSD but I
see the disk always running at 100% but I have less thant 10 users using the
program at once.
I want to try to send this hyper-v machine to a physical Computer to see if I
can gain more performace but I dont find that kind of aknowledge I found
viceversa, physical to Hyper-v. So the only way I found is to make a backup and
start from scratch and after then try to restore the data.
I found my solution is not the best due I will need to reconfigure all kind of
stuff (software settings that I dont have from Softland) and probably lots of
queries, and connection I could not see at this moment just only when I try to
test if my migration works.
any sugestion?
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Spice (7) Reply (10)
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alvarovelasco
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poblano
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10 REPLIES
* Rod-IT
pure capsaicin
Feb 16th, 2024 at 8:20 PM
How many SSDs, what RAID level?
Do your users access an app, stored on the server, or are they connecting to
the server directly?
Moving it back to physical, while an option, will likely yield you very
marginal performance if the configuration is the issue.
A disk running at 100% may only be because of activity, and not in itself an
issue.
What is the spec of the host?
When VMs are slow, it's either RAID or misconfigured VMs
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mace
Feb 16th, 2024 at 8:21 PM
The most straightforward option for you would probably be VHDX boot since
that does not require you to reconfigure everything but rather build a PoC to
see if that fixes your issues with performance
https://learn.microsoft.com/en-us/windows-hardware/manufacture/desktop/boot-to-vhd--native-boot--add-a-virtual-hard-disk-to-the-boot-menu
Opens a new window.
If you are desperate to move everything down to hardware and
migration/installation is not an option, you can use a free V2V converter
https://www.starwindsoftware.com/starwind-v2v-converter Opens a new window to
convert your VHD(X) files to binary IMG or VMDK disk images, boot your server
using live Linux USB and use trivial DD or Rescuezilla
https://rescuezilla.com/ Opens a new window to flush that binary IMG/VMDK
directly to physical disk. Make sure it detects all the partitions and file
systems before imaging, just in case.
If I were you seeing 100% disk usage and being sure that is the root cause of
the problem, I would just add 2-4 more disks to the existing RAID array to
boost performance or replace SSDs with 2 x NVMe and call it a day.
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* OP alvarovelasco
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poblano
Feb 16th, 2024 at 10:10 PM
Many thanks for your quick response, I will give you more info to see if I
have any fail in my install with Hyper-V, try to solve instead to go to
physical.
Host: Proliant MicroServer Gen10 Plus
OS: Windows Server 2019 Standard 64 Bit
Proc: Intel Xeon E-2224 3.4Gh
Ram: 32 Gb
HDD: Raid5 (3 disk 1 TB each) for the host
Hyper-V runining in a StandAlone SSD 2.5 1 TB.
The VHD is runing with 24 Gb Ram on the SSD, and the 4 Cores the processor
has. (there is no Raid here).
This server does not accept NVMe drives native, so I could do something with
a converter, but I think I am not going to gain nothing so need to connect
same to the Sata Controler.
The users dont have access to the server they use a Client/server APP to
properly move the Microsoft SQL Database (Microsoft SQL server 2017).
* local_offer Tagged Items
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* markwilliams3
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thai pepper
Feb 16th, 2024 at 10:16 PM
Honestly this sounds more like a configuration problem. Check for basic stuff
like the you have a 4 physical core CPU and the vm is assigned 4 or more
cores. See if the memory allocation is excessively high and forcing HyperV to
page file to disk.
Always make sure you have at least 1 physical core for the host OS and at
least 8GB of ram for host OS at all times.
Check that your storage is healthy as in no drives failing. Make sure there
are no other services or processes not needed to support HyperV running on
the host OS. Make sure your ERP vm is not a domain controller or providing
other network services.
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* Rod-IT
pure capsaicin
Feb 17th, 2024 at 12:35 AM
> alvarovelasco wrote:
>
> I will give you more info to see if I have any fail in my install with
> Hyper-V, try to solve instead to go to physical.
>
> Host: Proliant MicroServer Gen10 Plus
This would be useful in a lab or with very small workloads, but I doubt I
would use this as a production server. While the CPU and ram are not likely
the problems here, the server does have limitations.
> alvarovelasco wrote:
>
> Proc: Intel Xeon E-2224 3.4Gh
This CPU does not support HT, so it's 4 cores and nothing else, if you've
also assigned all 4 cores to the VM, this isn't going to help,
> alvarovelasco wrote:
>
> HDD: Raid5 (3 disk 1 TB each) for the host
>
>
> Hyper-V runining in a StandAlone SSD 2.5 1 TB.
>
> The VHD is runing with 24 Gb Ram on the SSD, and the 4 Cores the processor
> has. (there is no Raid here).
What is the purpose of the HDDs if the VM is on the SSD?
Low space on the SSD will cause issues, confirm you have at least 10-15% free
space. If your VM is on the HDD, note that this is going to be bad and with
RAID5, using the built-in RAID (software), this will be even worse as there
is no cache or battery backup.
> alvarovelasco wrote:
>
> This server does not accept NVMe drives native, so I could do something
> with a converter, but I think I am not going to gain nothing so need to
> connect same to the Sata Controler.
NVMe (assuming you mean PCIe ones) do not use the SATA ports, they use PCIe.
If you do mean the mSATA ones, you'd be better off sticking with what you
have.
How many users?
Does it happen if only one user is active?
Are your SQL databases indexed and non-fragmented.
Is it SQLExpress or full SQL (the former is limited to 1GB ram and 1 vCPU and
the latter will eat all of the available ram, unless you limit it).
Can you expand on what you mean by performance is not the best, is someone
running a report and hogging the resources, tell us a little about what is
happening.
I have 2 of those servers in my lab - but I do use NVMe drives (storage
only).
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* GregBradley
ECP Computer Systems is an IT service provider.
jalapeno
Feb 21st, 2024 at 5:27 PM
I'm familiar with that server and have used them in my lab and very small
customers, certainly not 10 users.
Allocating all 4 cores to the VM is wrong. 24GB out of the 32GB is OK as long
as there is just the one VM.
Hard to make sense out of your disk configuration with your statements of 1
SSD for the VM and 3 for the host. Sounds completely wrong.
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* OP alvarovelasco
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poblano
Feb 21st, 2024 at 5:43 PM
Text
Hard to make sense out of your disk configuration with your statements of 1 SSD for the VM and 3 for the host. Sounds completely wrong.
well, yes!! I have concord with you in this area but the server originally
comes with 4 1TB mechanical disk but was very slow (Sata 7200 rpm disks), so
I change one of them to deploy the VM there to try to improve the performance
of the VM, and was better, SSD drives run very faster in comparation, but now
I want to look more beyond of this and make some new changes, not sure if
changing all drives to SSD have sense, so I think the host does not need more
power to manage the HV machine. and for the quantity of users I have (less
than 10), I can assume I have enough power to move my 32 Gb SQL Database.
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* adrian_ych
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mace
Feb 22nd, 2024 at 11:06 AM
> alvarovelasco wrote:
>
> Text
>
> Hard to make sense out of your disk configuration with your statements of 1 SSD for the VM and 3 for the host. Sounds completely wrong.
>
>
> well, yes!! I have concord with you in this area but the server originally
> comes with 4 1TB mechanical disk but was very slow (Sata 7200 rpm disks),
> so I change one of them to deploy the VM there to try to improve the
> performance of the VM, and was better, SSD drives run very faster in
> comparation, but now I want to look more beyond of this and make some new
> changes, not sure if changing all drives to SSD have sense, so I think the
> host does not need more power to manage the HV machine. and for the
> quantity of users I have (less than 10), I can assume I have enough power
> to move my 32 Gb SQL Database.
I would assume that you are running server 2019 with hyper-v role and not
Hyper-v 2019 ? Then your VMs are also Server 2019 ?
Unlike Hyper-v server or ESXi, there is very little reliance on the host OS
for the VM's performance. SSDs can have like 3000 IOPS compared to 80-150
IOPS from SATA or 10K RPM SAS HDD. I would recommend to resilver the HDD into
SSDs as well....
Then you may need to tweak the VM if you want to use RDP (I assume is admin
mode for up to 2 RDP sessions) as well.
But the problem with ERP solutions is not the number of users but what does
it do within the 32GB SQL database as it might be querying lots of data,
creating reports, running massive BI tools and calculations etc.
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* m@ttshaw
mace
Feb 22nd, 2024 at 12:03 PM
In summary the Microserver is a low end low performance server. It is
especially weak in the area of disk performance.
Changing all disks to SSD will improve it. The virtual disk for the VM should
then be placed on the RAID 5. this will increase performance.
However the real solution is to move the VM to a new host with much better
disk IO.
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* glenmartin
pimiento
Feb 22nd, 2024 at 1:47 PM
Hi
What I would consider doing is running an application called TreeSizeFree
(v2.3) or thereabouts as administrator. Find where large files reside. Now
you could move that file / folder as long as its not in use to your HDD
(preferrably move only non frequently accessed information) then run mklink
to create a junction point making the file appear to be on the SSD but in
fact is residing on the HDD (e.g. Looks like its on C: but the file / folder
sits on D:)
Free and relatively easy.
I get confused sometimes as to the Link vs Target but maybe you'll do better
than me. ;-)
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