SQL 2012 on hyper-V

April 2, 2014, 2:09 am

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We have moved from vmware to hyper-V virtualization.

We have windows server 2012 and sql server 2012.
When executing some query on SQL server the CPU time is much greater than CPU time for the same query on the same sql server with the similar resources but on vmware virtualization.
(the query doesn't produce IO, since all data pages are in RAM - so, the problem is CPU)

I have tested the most simple queries as the most complex queries with the same execution plans on both servers. There is always similar difference in cpu time, couple of times slower.

Is there some well known configuration of hyper-v, which is optimal for running sql server on it? What should i check, any idea?

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VM Machines not communicating with each other on Hyper-V 2012

August 6, 2014, 9:43 am

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In Hyper-V 2012 on Server 2012 I have created two VM's Server 2008 64-bit & Server 2012 64-bit.

The problem is both VM's are not communicating with each other.

Regards

Ganesh Parte

Microsoft Network Adapter Multiplex Driver version

August 5, 2014, 6:31 am

≫ Next: What is normal range for CPU Wait time Per Dispatch on Hyper-V 2012

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On a Windows 2012 R2 server I was looking at the property of Teamed Network adapter and noticed the Microsoft Network Adapter Multiplex Driver version in version 6.3.9600.16384 with Driver Date of 2006-Jun-21. File name NdislmPlatform.sys Is this the latest driver?

What is normal range for CPU Wait time Per Dispatch on Hyper-V 2012

August 11, 2014, 8:10 am

≫ Next: Installing client on the Domain Controlller

≪ Previous: Microsoft Network Adapter Multiplex Driver version

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Hello.

I am trying to troubleshoot some performance issues with an application that utilizes sql server, which runs in a Hyper-V Guest.

I have found that the ram, cpu, disk i/o all appear to be within normal range.
Before troubleshooting the sql end of things, I wanted to make make sure the vm isn't waiting for cpu time.

In Vmware, the metric for this is " CPU Ready". From what I can tell, the equivilant to this for Hyper-V on server 2012 is:

Hyper-V Hypervisor Virtual processor\CPU Wait time per dispatch.

I have fired this up and been monitoring it and found that the average is around 22,000, maximum 41,000.

The problem is, I have no idea if this is a normal or acceptable range. I can't seem to find any further information on actually interpreting this data, as to what is acceptable and what will cause performance issues etc..

Can anyone help enlighten me further on this?

Thanks

Installing client on the Domain Controlller

August 11, 2014, 9:48 am

≫ Next: enable Hyper-V on ESXi 5

≪ Previous: What is normal range for CPU Wait time Per Dispatch on Hyper-V 2012

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Hi All

Can any one please advice me in right direction.

We had 2008R2 server running AD & DC and now i would like to install Hyper-v and a virtual machine with Windows 8.1 Pro on top of it.

Can it be added in to domain? Will there be any issues while sharing the drives,files & programs? Can the VM accessible

through RDP? 

Please share your thoughts

Thanks

enable Hyper-V on ESXi 5

August 11, 2014, 6:50 am

≫ Next: VM Proxy server on Hyper-V performance slow.

≪ Previous: Installing client on the Domain Controlller

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hi
i have a dedicated server with hyper-V on. since two peoples cannot work on the server at the same time . i installed Vmware workstation and ESXi as a Vm.
i can access to the ESXi using another machine and manage it with vCenter and vSphere .
i read that it's possible to enable hyper-v on a vm with the ESXi. i tried a lot of solution but it didn't work
does anybody knows an effective solution
thanks

VM Proxy server on Hyper-V performance slow.

August 7, 2014, 2:49 am

≫ Next: Hyper - V

≪ Previous: enable Hyper-V on ESXi 5

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I've a physical server ML350Gen8 with broadcom NIC as a window 2012-r2 hyper-v server. The Hyper-v have 2 VM (AD and Proxy). 

The AD VM is installed with win2012 and the proxy VM(win2003) is a VM converted from vmware server. 

First the ping value was high when perform ping to the VM. After disabled the physical and VM's VMQ the ping value low. 

But I encounter after the proxy server converted to hyper-v VM, the client machine that connected to proxy server internet browsing is awfully slow.

It does not have performance issue when its on Vmware server. I setup a new VM as proxy server installed with linux but the performance for the client to browse internet is still slow.

Any Hyper-v setting that could improve the performance? 

Hyper - V

August 12, 2014, 5:08 am

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≪ Previous: VM Proxy server on Hyper-V performance slow.

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Hi all,

I have a single server which is refurbished one from Rackable server.

The server config is

Intel s5000PSLMotherboard, Intel Xeon Quad Core dual processor, 12GB RAM, 300GB HDD SATA, Hardware virtualization enabled in BIOS.

I want to learn Hyper V

I have installed Windows 2012 DataCenter Edition

I am trying to create Windows 2008 R2 Server Virtual Machine. From this Windows 2008 R2 can i start learning HYper v, AD, DNS, DHCP?

Please advise how to learn virtualization with this? and how to learn by following the right path?

Tnx

Tony

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Help with Script

August 12, 2014, 3:13 am

≫ Next: Remotefx questions

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hi guys,

i am test creating of VM on the hyper-v 2012R2.

i have created a VM 2012R2 STD from scratch,

i need to create a script on power to create the VM for me while i run it.

can someone please put me on the right road ?

VM has two HDD

HDD 1 OS 20GB

HDD 2 Data 20GB

host is a singel one , no SSCM

your help is much appreciated !

Remotefx questions

August 12, 2014, 12:54 am

≫ Next: Virtualized IIS Web Layer

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Hello, I would like to run anywhere from 24-30 vms in hyper-v with remotefx.

I read somewhere there was a gpu limitation with remotefx for up to 12 vms per graphics card while using remotefx.

Is this true?  If I wanted to run 24-30 vms in hyper-v I would need at least 2 graphics cards?

Any help is much appreciated

Virtualized IIS Web Layer

August 12, 2014, 7:19 am

≫ Next: Storage issues during live clone in Server 2012 R2

≪ Previous: Remotefx questions

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So we have a few physical servers running Hyper-V VM web servers.  I have several virtual directories in IIS that point to the host through a UNC path.  I do this because the virtual machines do not have enough space to run all content.  Is there a better way to access the data on the host other than a UNC path?

Right now the setup looks like this:

The host has a C drive for the OS and a D drive for the VMs and Content.  I would split these but I do not have enough drives at the moment to do this.

The VMs have a C drive.  The drive is physically located on the D drive of the host.

Thanks

Storage issues during live clone in Server 2012 R2

December 4, 2013, 10:30 am

≫ Next: Server 2012 VM 0xc000000F A required device isn’t connected or can’t be accessed

≪ Previous: Virtualized IIS Web Layer

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We just set up a new 2012 R2 cluster and we are having troubles with live cloning. I have seen it work in our environment but usually it fails.

We get this error in our cluster events:

Cluster Shared Volume 'Volume8' ('Volume8') has entered a paused state because of '(c0000435)'. All I/O will temporarily be queued until a path to the volume is reestablished.

and the clone fails with:

Error (2916)
VMM is unable to complete the request. The connection to the agent ServerName was lost.

WinRM: URL: [http://ServerPath], Verb: [INVOKE], Method: [GetError], Resource: [http://schemas.microsoft.com/wbem/wsman/1/wmi/root/microsoft/bits/BitsClientJob?JobId={DC6D9530-26F1-4F95-A1AB-0197B1406F98}]

Not found (404) (0x80190194)

The storage is a Dell EqualLogic PS6500 and its connected to two S55 Force 10 48 port switches.  The client side of the network is hooked to two Cisco 2960G 48 port switches.

I can't find any information on error c0000435.  Has anyone head of this issue?

Server 2012 VM 0xc000000F A required device isn’t connected or can’t be accessed

August 11, 2014, 10:52 pm

≫ Next: Stabilty Issues with Migrated VMWare Servers on Hyper-V 2012 R2

≪ Previous: Storage issues during live clone in Server 2012 R2

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I am trying to boot a Server 2012 VM and it keeps giving me the below error

 

0xc000000F A required device isn’t connected or can’t be accessed

 

I tried running the below command but it did not help.

bootrec /fixmbr bootrec /fixboot bootrec /rebuildbcd

I also tried to run the  STARTREP.EXE” from X:\sources\recovery

Any idea how I can recovery this VM?

Stabilty Issues with Migrated VMWare Servers on Hyper-V 2012 R2

August 12, 2014, 7:34 am

≫ Next: Is it mandatory to enable hardware-assisted virtualization support in BIOS before installting Hyper-V Server 2012 R2?

≪ Previous: Server 2012 VM 0xc000000F A required device isn’t connected or can’t be accessed

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Hi

Has anyone who's migrated from vSphere to Hyper-v encountered issues with VM stability? We have a 12 node 2012R2 cluster and most of the VMs were migrated from VMWare 5 using various utilities (disk2vhd/starwind/etc).

It seems as if Server 2008-based VMs will now BSOD every once in a while. Virtual servers created from scratch do not have this issue. We've removed VMtools, we've removed anti virus, disabled VMQ for affected VMs, set the power options to high performance, updated integration services where needed... anything we can think of but a small handful of servers keep on doing it.

Its mostly server 2008 terminal servers which high specs and heavy workloads that this happens to. All we ever get is the bug check info in the minidump but we've made no hardware changes so I dont see how thats relevant to a VM. 

Anyone encounter something similar?

Is it mandatory to enable hardware-assisted virtualization support in BIOS before installting Hyper-V Server 2012 R2?

August 12, 2014, 11:12 am

≫ Next: windows server 2012 pricing

≪ Previous: Stabilty Issues with Migrated VMWare Servers on Hyper-V 2012 R2

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Hi,

I recently installed Hyper-V Server 2012 R2 on my PC. CPU is i5 3rd generation and it supports hardware-assisted virtualization. However, I didn't realize that until after I finished installing the Hyper-V server.

I can still enable it in BIOS. The question is, if I enable the hardware-assisted virtualization support now, is it sufficient?

If not, do I have to enable this in BIOS and install the Hyper-V Server OS all over again?

Please clarify.

Thanks

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windows server 2012 pricing

August 12, 2014, 10:53 am

≫ Next: Questions about 2008 Enterprise setup with 3 VM's

≪ Previous: Is it mandatory to enable hardware-assisted virtualization support in BIOS before installting Hyper-V Server 2012 R2?

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Hello, I would like to establish about 24-30 vms using windows server 2012 r2 hyper-v and remotefx.

I am hoping to do this off on rig and 1 monitor

Could anyone tell me which licence I need to purchase of windows server 2012 r2?

Questions about 2008 Enterprise setup with 3 VM's

August 12, 2014, 2:17 pm

≫ Next: Hyper-v host went down during SAN maintenance!!!

≪ Previous: windows server 2012 pricing

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I have 2008 Enterprise edition running on a box.  

I have 2011 SBS standard running on another box.  

I want to move the 2011 SBS to VM on the 2008 box.

I want to make 2 more VM's and install 2008 standard (using the free licences from the 2008 Enterprise) 

Does this sound right? 

Hyper-v host went down during SAN maintenance!!!

August 10, 2014, 5:30 pm

≫ Next: Migrate non local Physical running Linux Servers, CentOS, to VHD to run in VM on Hyper-V

≪ Previous: Questions about 2008 Enterprise setup with 3 VM's

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Hi gents,

Yesterday we had a very odd issue during our scheduled SAN maintenance.

We are using Flexpod architecture in our Hyper-v environment, Netapp SAN, Cisco UCS blades and Nexus switches.

Last night when we shutdown the SAN for maintenance all Hyper-v hosts stopped working! even the OS, a few of them with blue screen! (we DO NOT use boot from SAN, each blade has its own disks). However QUORUM was up

Any Idea of what went wrong?

This was also supposed to be fixed in HV 2008R2 with a KB!

This is what I'm getting in eventlog:

http://postimg.org/image/8m0xw0tz7/

Migrate non local Physical running Linux Servers, CentOS, to VHD to run in VM on Hyper-V

August 12, 2014, 2:41 pm

≫ Next: Losing Access to Cluster Shared Volumes: Cluster Shared Volume 'Volume1' ('CSV Disk1') has entered a paused state because of '(c0000435)'

≪ Previous: Hyper-v host went down during SAN maintenance!!!

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I am looking for the best method to migrate non local physical running Linux servers to run on Hyper-V.

The servers are running CentOS. They will need to be converted to VHD.

Is this possible? What's the best method if it is? Are there tools available to perform the migration, or to help?

I know there are some tools for migrating Windows Servers like Disk2VHD and SCVMM, but am not aware of anything for Linux that is not already in a VM and is not local.

Thanks,

Craig

Losing Access to Cluster Shared Volumes: Cluster Shared Volume 'Volume1' ('CSV Disk1') has entered a paused state because of '(c0000435)'

August 12, 2014, 8:05 am

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Hi,

Just built a Server 2012 R2 Hyper-V failover cluster connected to Equallogic 4110 storage arrays with latest firmware and HIT kits. 
When creating a clone or vm from a template we see that the cluster loses access to the storage csv volume that is hosted on the equallogic storage with the following errors:

Cluster Shared Volume 'Volume1' ('CSV Disk1') has entered a paused state because of '(c0000435)'. All I/O will temporarily be queued until a path to the volume is reestablished.

Can anyone shed any light onto this issue?

Full details below:

Log Name: System
Source: Microsoft-Windows-FailoverClustering
Date: 06/08/2014 09:31:17
Event ID: 5120
Task Category: Cluster Shared Volume
Level: Error
Keywords: 
User: SYSTEM
Computer: SVR1
Description:
Cluster Shared Volume 'Volume1' ('CSV Disk1') has entered a paused state because of '(c0000435)'. All I/O will temporarily be queued until a path to the volume is reestablished.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Microsoft-Windows-FailoverClustering" Guid="{BAF908EA-3421-4CA9-9B84-6689B8C6F85F}" />
<EventID>5120</EventID>
<Version>0</Version>
<Level>2</Level>
<Task>38</Task>
<Opcode>0</Opcode>
<Keywords>0x8000000000000000</Keywords>
<TimeCreated SystemTime="2014-08-06T08:31:17.330643100Z" />
<EventRecordID>36230</EventRecordID>
<Correlation />
<Execution ProcessID="2336" ThreadID="3524" />
<Channel>System</Channel>
<Computer>SVR1</Computer>
<Security UserID="S-1-5-18" />
</System>
<EventData>
<Data Name="VolumeName">Volume1</Data>
<Data Name="ResourceName">CSV Disk1</Data>
<Data Name="ErrorCode">(c0000435)</Data>
</EventData>
</Event>

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