HP DL380 G5 Windows Server 2012 R2 Hyper-V

July 24, 2014, 3:23 am

≪ Previous: Disk Configuration Question for Performance

Hello. I have a HP DL380 G5 server & a have a problem. OS installation proceeds normally, the installation takes the role well, but the virtual machines is running weird. When using a network inside a virtual machine (for example, copy of iso file from the network to virtual machine) CPU inside of the VM at 100%. 50-60% is process System interrupts. All terribly slow, up until the copy end.Ido not know what to do.Maybesomebody facedwithsomething similar? Thnx!

HP DL380 G5:
Intel Xeon 5130 2.0 GHz * 2
Ram 32 Gb
Raid Smart Array P400i 512mb + battery
Network Broadcom BCM5708C 1 Gb * 2
Host OS - raid 1
VMs - raid 10

BIOS P56
HP Service Pack for ProLiant 2014.06
Windows Server 2012 R2 + all updates + all newest drivers

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Convert vhdx to vhd

January 28, 2015, 10:26 pm

≫ Next: GPU Pass-through in the Works for Hyper-V? GRID Tech wanted!

≪ Previous: HP DL380 G5 Windows Server 2012 R2 Hyper-V

Hi,

Running Server 2012 R2

I have a requirement to convert a vhdx to vhd. I used the builtin feature in the hyperv manager to convert the vhdx (Fixed) disk to a vhd (fixed).

When i create a new server an attach this vhd disk, i get an error when the vm boots. It briefly displays the windows logo, then gives an error: boot failure. Reboot and select proper boot device or insert boot media in selected boot device. This occurs whether i attach the disk as ide or scsi.

Why would the converted drive no longer be bootable?

Any help would be greatly appreciated

Sean

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GPU Pass-through in the Works for Hyper-V? GRID Tech wanted!

January 13, 2014, 6:13 pm

≫ Next: Host a Hyper-V environment in another host?

≪ Previous: Convert vhdx to vhd

A plea or question - call it what you will. PLEASE, GPU Pass-through for Hyper-V! Is it in the works for future versions of Hyper-V? Has there been any more collaboration with NVIDIA on GRID tech? It seem like Citrix and VMWARE are stealing all of NVIDIA's attention.

RemoteFX is an improvement over no VGPU, but needs the GPU pass-through. After implementing RDS 2012R2 with VMM 2012 R2 for Iowa State University, I am having to begin development on XenServer for GPU Pass-through / GRID enabled virtual desktops and miss VMM already. I'd even settle for a new VMM plugin for XenServer since development seems to have ended.

Thanks,

Damien

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Host a Hyper-V environment in another host?

January 26, 2015, 11:41 am

≫ Next: Hyper-V 2012 general administration and configuration questions

≪ Previous: GPU Pass-through in the Works for Hyper-V? GRID Tech wanted!

We need to create a lab environment where we can spin up the following to help train people how to use HyperV with our applications.

Each student will need:
2 HyperV systems
each system will have 4 Windows Server 2012 R2 VMs on it.

The 2 hosts need to be virtual so that we can duplicate them and grow with scale depending on the number of students in the class.

However at this time it looks like HyperV cannot be a role installed on a VM that is hosted by VMware host or HyperV host. At least not in a supported state.

We're not sure how else we're supposed to train our staff on using HyperV in the field. It can't just be basic HyperV training that is already out there.

Is there any product out there where you can create a virtual machine that runs HyperV and then inside that VM which is now a virtual host, run four other VMs?

Since Microsoft and VMware both don't officially support running nested HyperV I'm not sure where to look.

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Hyper-V 2012 general administration and configuration questions

January 7, 2015, 2:19 pm

≫ Next: Querying actual memory use in guest with dynamic memory

≪ Previous: Host a Hyper-V environment in another host?

My company is moving heavily into virtualization. We have about 50 HW servers and 2 HyperV 2008 single hosts. I just built a pretty beefy Hyper-V 2012 clustered server and connected it to a brand new SAN.

I've read several articles before building the system to ensure that i follow those best practices, like this one.

http://blogs.technet.com/b/askpfeplat/archive/2013/03/10/windows-server-2012-hyper-v-best-practices-in-easy-checklist-form.aspx

The new system is running great. It has a dedicated NIC for live migrations, which has been tested.

My questions are really about resource usage. Determining how many virtual machines to put on one physical NIC, and how many virtual processors to give a virtual machine. I found an article that described mathematically what my limits are for a single virtual server. My server has 24 cores with 48 logical processors and 512 GB RAM.

What i'm not sure of is how many virtual processors I should give a machine. What I'm doing currently is starting small and just visually rating performance. If the machine seems slow i turn it off and give it two more processors. Does this sound like a good method?

Also, does anyone know how processor affinity work for HyperV. I would assume that HyperV balances threads across all cores. Or does it load up cores first them move to others.

Then there are the physical NICS. The back end ISCSI nics for the SAn are 10G and isolated and HyperV isn't allowed to use them. The front end NICS for the virtual servers are 1G. I'm watching them for load, but they seem to be no where near saturated. How many virts should I put on a single NIC? Is it just based on saturation or are there other considerations?

Thanks,

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Querying actual memory use in guest with dynamic memory

January 29, 2015, 9:10 am

≫ Next: Hyper-V cluster and guests VMs in different subnets

≪ Previous: Hyper-V 2012 general administration and configuration questions

I need to programatically determine how much memory a Hyper-V guest with dynamic memory is using, from within the guest running Windows Server 2008 R2, without access to the host.

The total amount the guest thinks it is using is, of course, easy to get. But most of that is driver locked memory created by the memory balloon, not memory actually in use by the guest. I have not been able to find a way to query the current size of the memory balloon.

You can see the size of the driver locked memory using Sysinternals RAMMap.exe, but I need a way to get that value in PowerShell.

Any ideas?

Thanks

Tim Curwick
MadWithPowerShell.com

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Hyper-V cluster and guests VMs in different subnets

January 28, 2015, 11:45 pm

≫ Next: formula for calculate vCpu

≪ Previous: Querying actual memory use in guest with dynamic memory

Hi all,

I have a customer that need Hyper-V cluster nodes network subnet on a VLAN\subnet different than the guest VMs to be hosted on the Hype-V cluster (hosts in a subnet and guests on different subnet). Is this possible? Is it only about doing network routing on the router\L3 switch?

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formula for calculate vCpu

January 25, 2015, 9:02 pm

≫ Next: RemoteFX Support for Gen2 VMs

≪ Previous: Hyper-V cluster and guests VMs in different subnets

i use windows 2012 R2

and enable Hyper-V Role

and i want how to calculate vCPU formula ?

socket x core
socket x core x threads
socket x core x 2
socket x core x threads x 2
socket x core x 8
socket x core x threads x 8

ิbest regards

chatchai-netd

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RemoteFX Support for Gen2 VMs

October 12, 2014, 5:55 pm

≫ Next: Hyper-V over SMB 3.0 poor performance on 1GB NIC's without RDMA

≪ Previous: formula for calculate vCpu

When does Microsoft plan to add support for RemoteFX to Gen2 VMs? Will there be a service pack at some point for Windows Server 2012 R2?

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Hyper-V over SMB 3.0 poor performance on 1GB NIC's without RDMA

December 19, 2013, 3:03 am

≫ Next: Execute powershell commands on a VM from the host.

≪ Previous: RemoteFX Support for Gen2 VMs

This is a bit of a repost as the last time I tried to troubleshoot this my question got hijacked by people spamming alternative solutions (starwind)

For my own reasons I am currently evaluating Hyper-V over SMB with a view to designing our new production cluster based on this technology. Given our budget and resources a SoFS makes perfect sense.

The problem I have is that in all my testing, as soon as I host a VM's files on a SMB 3.0 server (SoFS or standalone) I am not getting the performance I should over the network.

My testing so far:

4 different decent spec machines with 4-8gb ram, dual/quad core cpu's,
Test machines are mostly Server 2012 R2 with one Windows 8.1 hyper-v host thrown in for extra measure.
Storage is a variety of HD and SSD and are easily capable of handling >100MB/s of traffic and 5k+ IOPS
Have tested storage configurations as standalone, storage spaces (mirrored, spanned and with tiering)
All storage is performing as expected in each configuration.
Multiple 1GB NIC's from broadcom, intel and atheros. The broadcoms are server grade dual port adapters.
Switching has been a combination of HP E5400zl, HP 2810 and even direct connect with crossover cables.
Have tried stand alone NIC's, teamed NIC's and even storage through hyper-v extensible switch.

File copies between machines will easily max out 1GB in any direction.
VM's hosted locally show internal benchmark performance in line with roughly 90% of underlying storage performance.
Tested with dynamic and fixed vhdx's
NIC's have been used in combinations of RSS and TCP offload enabled/disabled.

Whenever I host VM files on a different server from where it is running, I observe the following:

Write speeds within the VM to any attached vhd's are severely effected and run at around 30-50% of 1GB
Read Speeds are not as badly effected but just about manager to hit 70% of 1GB
Random IOPS are not noticeably affected.
Running multiple tests at the same time over the same 1GB links results in the same total through put.
The same results are observed no matter which machine hosts the vm or the vhdx files.
Any host involved in a test will show a healthy amount of cpu time allocated to hardware interupts. On a 6 core 3.8Ghz cpu this is around 5% of total. On the slowest machine (dual core 2.4Ghz) this is roughly 30% of cpu load.

Things I have yet to test:

Gen 1 VM's
VM's running anything other than server 2012 r2
Running the tests on actual server hardware. (hard as most of ours are in production use)

Is there a default QoS or IOPS limit when SMB detects hyper-v traffic? I just can't wrap my head around how all the tests are seeing an identical bottleneck as soon as the storage traffic goes over smb.

What else should I be looking for? There must be something obvious that I am overlooking!

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Execute powershell commands on a VM from the host.

January 30, 2015, 7:05 am

≫ Next: Exporting VM to shared folder from 2k8 R2 Core Hyper-v to other 2k8 server

≪ Previous: Hyper-V over SMB 3.0 poor performance on 1GB NIC's without RDMA

I’m wondering if it’s possible to execute PowerShell commands from the host that will be execute on a virtual machine.

I have around 10 VM and I need to run the same command on all of it and I need to do the same in other 15 host. None of the VM belong to the same domain.

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Exporting VM to shared folder from 2k8 R2 Core Hyper-v to other 2k8 server

January 30, 2015, 4:12 am

≫ Next: How to get the current user name of the host who is occupying a specific VM?

≪ Previous: Execute powershell commands on a VM from the host.

Hi,

I am trying o export VM to shared folder from my Hyper-V host based on 2k8 R2 Core edition and so far I fail miserably.

It seems that not only I had this problem but I was not able to find a solution yet in neither of the other threads I have found about it.

I have tried well advertised method of:

http://blogs.msdn.com/b/virtual_pc_guy/archive/2010/03/15/exporting-to-importing-from-a-network-share-hyper-v.aspx

but it does not work in Core environment (I have also tried giving "everyone" and "guest" full NTFS and Shares permissions to no result). With above mentioned methods all I am getting is

Did anybody have found a working method to export to shared folder using Core version of 2k8 (both target and source are in one domain).

Thanks

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How to get the current user name of the host who is occupying a specific VM?

January 29, 2015, 8:47 pm

≫ Next: physical to virtual ends with errors, other methods export but launch with windows repair 2008 r2

≪ Previous: Exporting VM to shared folder from 2k8 R2 Core Hyper-v to other 2k8 server

I'm developing a winform app with c# code to manage Hyper-V. I need to remind someone if he/she would take a VM which has already been occupied by others.

Is there any powershell cmd or WMI interface to get the current user of a specific VM?

Thanks!

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physical to virtual ends with errors, other methods export but launch with windows repair 2008 r2

January 30, 2015, 12:31 pm

≫ Next: Prompt to Delete. HyperV Manager

≪ Previous: How to get the current user name of the host who is occupying a specific VM?

New to hyperV here, plan to implement it in a few months. So I am practicing with it now.

I am trying to convert a working 2008 r2 physical to virtual using Microsoft virtual machine converter. in the settings I was point it to my hyperv- server and I was getting errors, this was due to permissions. No matter what I did I can't get it to work, not sure whats wrong. SO I installed hyper V under my win8.1 pro machine shared the folders and the export started.

Upon the end of the export where it goes into "Fixing disk' I get an instant error no matter how may times I do this or how which server I try to export I get an error here.

It still created files and when I then copy those over to my test hyper V the win2008 R2 export goes into repair mode, I'm sure it's a driver issue but I would have expected that MS would have stripped the drivers our before export.

I then tried Acronis backup server and was able to export to MS virtual machine but this export also goes into windows repair more.

In the past I've used acronis and restored a physical server , this would also go into repair mode unless I use the "intelligent restore" which strips the drivers.

I don't want to tinker with the live server to get this to work since It's still in production, but I would like to get this to work , would any one have a tip, what can I do to provide more information on the root of the problem?

nambi

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Prompt to Delete. HyperV Manager

January 30, 2015, 11:23 am

≫ Next: P2V Migration hardware problems - Blue Screen of DEATH!

≪ Previous: physical to virtual ends with errors, other methods export but launch with windows repair 2008 r2

Hello all

Windows 2012. Hyper-V Manager.

Question: Is there a way to have a prompt (OK/Cancel) when using the option to delete?

Once I meant to rename a computer (right click on VM) but since it's the option above delete, I accidentally deleted the virtual machine instead. I would like to know if there is an option to have a pop-up prompt to select OK or Cancel when deleting a virtual machine.

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P2V Migration hardware problems - Blue Screen of DEATH!

January 30, 2015, 12:24 pm

≫ Next: hyper-v 2012 r2 teaming bug?

≪ Previous: Prompt to Delete. HyperV Manager

We're starting to virtualize some of our HW servers. We're using a backup product called Dell AppAssure and porting the image to virtual from their backup snapshot.

I know this isn't a Dell forum, but what is happening is that the snapshot is taken with certain registry settings shich point to the local boot device. Obviously when the image becomes virtual, that HW is gone. There is a KB article from Dell which describes a way to boot to recovery, load the registry hive, modify some registry keys like so..

intelide = 0

pciide = 3

LSI_SAS = 0

https://support.software.dell.com/appassure/kb/120315

etc..

My question to you guys is this. Is there some way for me to prep a server before hand, so that when I take a snapshot of it and migrate it, it won't blue screen. Maybe some kind of prep tool. I'm guessing there are lots of products for P2V migrations alone, but I can't take these servers down which is why using a backups snapshot is more attractive.

Thanks,

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hyper-v 2012 r2 teaming bug?

August 29, 2013, 12:50 pm

≫ Next: Can I apply policy-based QoS to the VM network traffic?

≪ Previous: P2V Migration hardware problems - Blue Screen of DEATH!

2 hyper-v host with 5 nics each. Shared stored is a iSCSI SAN.

With hyper-v 2012 no issues with teaming. 3 nic team for vmswitch no vlan, Live migration vlan 10, cluster heartbeat vlan 20, and host management IP no vlan. When I created the vmswitch I stated allowmanagmentos 1. Works great.

hyper-v 2012 r2 not so much. Whenever I create the same team configuration as above I loose all IP communication, both in the vmswitch and management IP. I soon as I break the team and assign the vmswitch to a standard NIC the VM's can get an IP address and the other NICs that were in the team get a DHCP address. Recreating the team I again loose all IP communication.

Any help would be appreciated.

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Can I apply policy-based QoS to the VM network traffic?

January 31, 2015, 6:28 am

≫ Next: DC from syspreped vhdx

≪ Previous: hyper-v 2012 r2 teaming bug?

Hi,

If I create a QoS policy (policy-based QoS, for example with New-NetQosPolicy) on a Hyper-V host (2012 R2), will it apply to the host traffic only, or it will apply both to the VM traffic and to the host traffic?

By “host traffic” I mean the traffic that is sourced or destined to the host operating system - as opposed to traffic sourced or destined to the VM’s running on this host. Please note that I am NOT asking about Hyper-V specific QoS policies (Hyper-V QoS, Set-VMNetworkAdapter).

Regards,
Pawel Mazurkiewicz

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DC from syspreped vhdx

January 31, 2015, 8:16 am

≫ Next: SCVMM 2012 SP1 Virtual Switch on Cluster Node Disappears

≪ Previous: Can I apply policy-based QoS to the VM network traffic?

in lab I am usually using generalized vhdx for VMs

I just set up a new AD with DC from syspreped Server 2012.

First trouble I hit setting up time. After some troubleshooting I unregister/reregister time service.

But could not start it. And the error was related to SID. So I just reinstalling DC from ISO.

The question: is it known that DC must not be created from syspreped disk?

Does such a disk could create troubles with other member servers like SQL, SCCM?

Thanks.

--- When you hit a wrong note its the next note that makes it good or bad. --- Miles Davis

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SCVMM 2012 SP1 Virtual Switch on Cluster Node Disappears

August 26, 2014, 7:09 am

≫ Next: Unable to specify both source and size with New-VHD command

≪ Previous: DC from syspreped vhdx

I have been running into an interesting but an alarming issue with virtual switches. I have recently built a 4 node Server 2012 Hyper-V failover cluster. I have built numerous 2008R2 and 2012 Hyper-V clusters before, so I am pretty familiar with the process. I have rebuilt my VMM due to software problems, and on this new cluster, I have configured the virtual switches with nic teaming on 2 of the virtual switches.

I have 4 clusters being managed by this VMM.. and this newly built cluster keeps losing all of the VMM virtual switch configurations, meaning if I go to properties on the problem host and click on virtual switches, its blank. Refresh host cluster flags all virtual machines in this cluster as "Unsupported Configuration," making the vm unmanageable via VMM.

Information (26844)
Virtual switch (Virtual Switch Name) is not highly available because the switch is not available in host (One of the Hyper-V Hosts).

Recommended Action

All virtual servers on that host still has connectivity, as all virtual switch configs are normal when looking at it with Hyper-V Manager or Failover Cluster Manager..

The workaround is to evacuate the host using Failover Cluster Manager and reboot the host. Then refresh the host. Then refresh the VM's. I cannot consider this a 'workaround' as I cannot be rebooting my hyper-V hosts every week.. and migrating virtual servers constantly just for this reason. (DPM backups have a FIT with csv's if it tries to backup a vm on a same csv as another vm thats being migrated.)

I have been wrestling with this problem for a few weeks now. The cluster has been slicked and completely rebuilt.. Still same problems. Has ANYONE else out there seen this issue? Does ANYONE out there suggest a way to go about further troubleshooting this issue?

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