Question regarding CPU per host and Core per VM

November 26, 2013, 12:00 am

≫ Next: Can't access network computers from Hyper-V Server 2008 R2

≪ Previous: Live Migration between AD Forests

Hello Folks,

I have a question - a stupid question for you, expert of Windows server 2012 R2 and Hyper-V :))

My physical host is equipped with :

2 x Intel(R) Xeon(TM) Processor 2.7 GHz - 8 Core per CPU
128 Gb RAM

At this time Hyper-Threading is disabled - because of recommendation for the software that will be installed on 5 Virtual Machine.

I need to host 5 VM ( on Windows server 2012 R2 too) on the host with a total of 18 Cores and 80Gb.

OK !

For the memory, I think it's good, I have enough for my 5 VM. But for the Core ?

Talking to an expert on Hyper-V, he tell me that with 16 core on the physical server, I can use 24 Core on my VM ( 1.5x cores count). Is he right ?

Can I installed 5 VM for which I need a total of 18 Cores ?

Can some one confirm ? give me an MSFT article about this topics ?

Thx in advance for your help !

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Can't access network computers from Hyper-V Server 2008 R2

November 25, 2013, 10:38 am

≫ Next: AzMan replacement in 2012 R2

≪ Previous: Question regarding CPU per host and Core per VM

I have a Hyper-V Server (call it Server-X) that can be accessed from all computers on my domain network. However, I cannot access any domain computers or NAS drives from Server-X. I can ping the resource by IP address from Server-X, but I cannot access by name (i.e. \\NAS\Public or \\Server-Z\c$).

Note as stated above... I do not have this problem from within any of the Hyper-V servers or physical workstations on my network.

Thoughts appreciated!

Thanks.

Seth

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AzMan replacement in 2012 R2

November 11, 2013, 1:57 am

≫ Next: Kernel Panic after importing Linux VM

≪ Previous: Can't access network computers from Hyper-V Server 2008 R2

Since the removal of AzMan in 2012 R2, what apart from the local Hyper-V Administrators group can we use? I need to limit access to a Hyper-V server.

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Kernel Panic after importing Linux VM

November 26, 2013, 8:57 am

≫ Next: Hyper-v Migration from Standalone host to Cluster

≪ Previous: AzMan replacement in 2012 R2

I'm running a VM with Red Hat 5.7 and lastest available LIS drivers installed virtualized on Hyper-V 2008 R2 SP1.

I'm migrating to Hyper-V 2012 R2 and i've made an export of this VM with success and imported it into the new hypervisor.

When i start the vm, i get an kernel panic error, saying this:

unable to access resume device (LABEL=SWAP=hda3)

could not find filesystem '/dev/root'

If i start the vm in Hyper-V 2008 R2, it works like a charm.

Any help will be welcome.

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Hyper-v Migration from Standalone host to Cluster

November 26, 2013, 9:05 am

≫ Next: Hyper-V or WSRM (or both)?

≪ Previous: Kernel Panic after importing Linux VM

Hi Team,

I have Hyper-v Host connected directly with DELL FC Storage running as standalone host. 16 Virtual machines are running on both host .8 on each host . Some virtual machine are running with Pass through Swicth.

Please let me know can i configure Both host as Hyper- cluster and connect CSV with Both and make virtual machine as HA enabled.

I want to configure File Server Guest cluster in vHDX which required host to be in failover Cluster Mode.

Thanks

Ravindra

Ravi

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Hyper-V or WSRM (or both)?

November 26, 2013, 8:02 am

≫ Next: ReFS and Hyper-V VHD

≪ Previous: Hyper-v Migration from Standalone host to Cluster

We've just built a new Server 2012 (not R2) to run Hyper-V. This server also runs other applications, and I don't want these apps restricting Hyper-V performance, so I want to use WSRM to manage this. I've used WSRM in 2008R2, and it works fine for what I need, but in 2012 WSRM shows as 'Depreciated'. Even in this case though, I assume WSRM can be installed, but does it co-exist well with Hyper-V, or should I be using Hyper-V to manage resources?

I think WSRM has been pulled completely in 2012 R2, so this is the end of the line for it, but if not Hyper-V, what should I be using now to manage resources?

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ReFS and Hyper-V VHD

November 22, 2013, 9:12 am

≫ Next: Can I configure this senario (Cluster of 6 Nodes replicate to the same replica server )and doesn't the replica failed due to live migration ?

≪ Previous: Hyper-V or WSRM (or both)?

For a new Hyper-V cluster (server 2012 R2) what are the benefits and drawbacks of using ReFS for the Hyper-V VHD drive?

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Can I configure this senario (Cluster of 6 Nodes replicate to the same replica server )and doesn't the replica failed due to live migration ?

November 26, 2013, 3:33 am

≫ Next: Hyper-V for Test environment with internet but not LAN access.

≪ Previous: ReFS and Hyper-V VHD

Hi,

we want to implement a replica of hyper-v cluster

We have cluster 2012 contain 6 nodes windows 2012 core

and another server has enough storage we want to configure it as a replica server for the above cluster ,

My question is : Can I configure this senario (Cluster of 6 Nodes replicate to the same replica server )and doesn't the replica failed due to live migration ?

Ramy Shaker

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Hyper-V for Test environment with internet but not LAN access.

November 26, 2013, 10:49 am

≫ Next: Creating HYPER V CLUSTER Error:

≪ Previous: Can I configure this senario (Cluster of 6 Nodes replicate to the same replica server )and doesn't the replica failed due to live migration ?

This is what I thought would be a standard scenario, but the plethora of methods I have attempted to get my test environment access to the Internet but not my LAN/Domain have all failed.

The goal is a 4 VM test environment on one host where data can be moved from that host to the VMs and the VMs can access internet (to test that part of that for which they are the test environment).

I initially though I would build a subnet to this purpose with four NICs on the server (one for each VM) and two NICs on the host (one for LAN/Domain connection, and one for VM connection, such as data transfer).

The more I read, the more it sounded like I had over complicated matters, so I tried instead to bypass the 4 NIC subnet method, and use private virtual network connected to one of the server NICs and leave the other in its' standard LAN configuration, then use RRAS as a NAT router.

I have found it easy to get the four VMs talking to one another, but not get them a route to the internet.

So folly aside, what is the best way to have my test environment of 4 virtual machines on this host, be able to get data from the host, and access the internet, but not interfere with any LAN/Domain activity?

Open for suggestions and eager for the assistance-

Sincerely,

Stuart

Stuart TechnoFile

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Creating HYPER V CLUSTER Error:

November 26, 2013, 10:56 am

≫ Next: Dynamic(Switch Independent) NIC Teaming Mode Problem

≪ Previous: Hyper-V for Test environment with internet but not LAN access.

If you try to do a new Hyper V 2012 R2 cluster with the Failover Cluster Wizard in a full Win 2012 Server, sends error.

When you start the process, says Forming Cluster "CLUSTER"
The Operation is taking longer than expected

At the end, throws this:

An error occurred while creating the cluster.
An error occurred creating cluster 'CLUSTER'.
This operation returned because the timeout period expired

The problem was that you need to create the cluster from a Windows 2012 R2 Failover Cluster Manager. R1 doesn't seem to work.

When you do the same in a full Windows 2012 R2 server with the Failover Cluster Manager, works ok.

Can anyone confirm this?..

If this is a yes, can you please, Microsoft, notify the user with a msg? Something like the node that you adding is NOT supported with this Failover Cluster Manager

Another Question:

Same applies for Win8, Win8.1 Manager tools?.. Do we have to use Win 8.1 tools for hyper V 2012 R2?

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Dynamic(Switch Independent) NIC Teaming Mode Problem

November 26, 2013, 1:50 pm

≫ Next: Hyper-v Cluster without Shared SAN storage

≪ Previous: Creating HYPER V CLUSTER Error:

Hi,

We are using Switch Independent Dynamic distribution NIC Teaming configuration on Hyper-V 2012 R2 cluster. In the following graphs between 19:48 - 19:58 you can see clearly how dynamic NIC teaming mode badly affected the web servers response times.

We have encountered this problem on the different cluster nodes that use different NIC chipsets Intel or Broadcom and configured with dynamic NIC teaming for VM Network connection.

If we change the teaming mode as Hyper-V Port or remove NIC teaming for VM network as you can see from the graphic, response times are back to normal.

Any ideas?

Regards

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Hyper-v Cluster without Shared SAN storage

November 26, 2013, 7:29 am

≫ Next: Hyper-V and Server 2012 Project where 2 small biz are consolidating...Please HELP

≪ Previous: Dynamic(Switch Independent) NIC Teaming Mode Problem

Hi Team,

Our Envorinment consist of VMware and Hyper-v Both . we have two project which will run on Virtual platform.

we dont have SAN storage since vmware team suggested us that we can achieve HA /VMotion without having SAN storage by using their STorage appliance Feature. It looks like we can achieve VMware HA without having SA Storage which is a great New.

do we have same kind of feature available in Hyper-v 2012 R2 also.

We have six server with all 900 GB 6 SAS disk . we will utilize three for VMware & three for Hyper-v .

Please let me know if we have production supported Storage Appliance kind of feature in Hyper-v also.

Thanks

Ravindra

Ravi

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Hyper-V and Server 2012 Project where 2 small biz are consolidating...Please HELP

November 22, 2013, 1:12 pm

≫ Next: Hyper-V 2012 - IBM DS3524 SAN via SAS

≪ Previous: Hyper-v Cluster without Shared SAN storage

This is for a small business in two different locations who recenltly merged and have a total of about 50-60 users. I was brought on to consolidate and virtualize their physical servers. They have 2 - Server 2012 Servers with Hyper-V already installed. Currently they run a mix of Physical Small Business Server 2011 and Server 2003 and Server 2008. This is the new Hyper-V Server thats already in place.

2 Hyper-V Machines- Dell PowerEdge R520
Both have Server 2012 Enterprise with Hyper-V role installed
2 x Intel(R) Xeon(R) CPU E5-2450 0 @ 2.10GHz
16GB RAM Each
4 x Broadcom NICs
4TB NAS

-Both Hyper-Vs are setup as Domain Controllers but have no VMs currently.

-Site One Currently: Server 2008 is DC and File and Application Server

-Site Two Curently: SMS 2011 is DC, Sharepoint, Application, and File Server

-Each site also has their own Exchange Servers which is going to be migrating to Office 365

-SQL Server 2008R2 and Terminal Services Server 2003 are also in place in one site.

-They also want to have DFS setup between the 2 Hyper-V Servers.

I am getting confused because, for one, I'm new at doing this and I have been reading so many docs and forums and watching videos that although there are best practices, there's a number of ways to go about this task. I guess I'm hoping for a little push in the right direction. My plan was to create a seperate VM in each Hyper-V for Application and File Server; Another for Sharepoint. I'm getting confused because where would AD go? All recommendations are that they should not be on the Hyper-V Server. Would that be a seperate VM or on a seperate physical box? And is the hardware listed above for the Hyper-V sufficient? I'm concerned the Memory may not be sufficient. Also, we don't have System Center Installed, just Hyper-V Manager on the HyperV Servers. Is that enough to manage the small numbe rof VMs? Or do I need to console and manage from a seperate machine?

Sorry if this isn't enough information. I'm new to Hyper-V and virtualization. Thanks in advance and any help or guidance is appreciated.

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Hyper-V 2012 - IBM DS3524 SAN via SAS

November 26, 2013, 5:22 am

≫ Next: XP/SP3 & Hyper-V RC1 - cannot upgrade integration services

≪ Previous: Hyper-V and Server 2012 Project where 2 small biz are consolidating...Please HELP

Hi all,

I'm looking for a bit of guidance on the DS3524 (with SAS connections) and Hyper-V 2012 with regards to MPIO. I have come from a VMware background and have only worked on iSCSI SANs so this is all new to me.

Firstly the setup...

1 x DS3524 with Dual Controllers using SAS Connections (Hardware ID: 1764 FasTt Firmware: 07.86.32.00)
2 x IBM 3650 M4 with 2 x IBM 6GB SAS HBAs in each
DS Storage Manager Version 10.86.0G05.0035
Windows 2012 Datacenter with Hyper-V 2012

What I am having difficulty finding is a definitive guide on how to configure the DS3524 in Windows 2012 (Hyper-V) with SAS connections. I have configured the Array in the DS Storage Manager, created some LUNs, created the Hosts using the Host Port Identifiers on the SAS cards, and mapped the LUNs pretty much as I would have done as if I was setting it up for iSCSI. I have set the Host Operating System to Windows Clustered.

From Windows, I can see the storage in Storage Pools, it shows as Primordial and then I can see the disks I have created when I select it and I can create a virtual disk on it etc. This is now where I am getting a little confused! As there are two SAS connections from each host, I would have thought I would need to setup MPIO as you would with an iSCSI connection. I have installed the DS Storage Manager host software on each host which installs MPIO and I can see the SAN listed in the Device Hardware ID, however when I select the Discover Multi-Paths tab, all the options are greyed out. I can see the 'Add support for SAS devices' checkbox, but cannot select it.

My specific questions are...

1) Do I need to use MPIO for my setup?
2) If not, how is failover handled?
3) Have I selected the correct Host Operating System for the Hosts in DS SM?
4) Is there a guide which explains all this?

Any help would be greatly appreciated!

Thanks,

Mark

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XP/SP3 & Hyper-V RC1 - cannot upgrade integration services

May 22, 2008, 10:26 am

≫ Next: The Default Virtual Machine Configuration Store Cannot be Changed......

≪ Previous: Hyper-V 2012 - IBM DS3524 SAN via SAS

I have two XP / SP3 vitrual machines, and on each one, after I dismiss the "found new hardware" wizard, and try to install the Integration Services, I receive the "A previous installation og Hyper-V integration services has been detected"

I click OK to "upgrade or repair", and I get the following error message:

"An error has occured: Fatal error during installation."

My event viewer doesn't seem to have any relevant information.

Ideas?

Karl

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The Default Virtual Machine Configuration Store Cannot be Changed......

November 26, 2013, 3:24 pm

≫ Next: Hyper-V WIndows Server 2012 R2 event ID 157 Disk x has been surprise removed using windows backup

≪ Previous: XP/SP3 & Hyper-V RC1 - cannot upgrade integration services

I am trying to change the default virtual machine configuration store from within the hyper-v settings to a SMB 3.0 share. I have been able to change the Hard Disk location but when I try to change the Virtual Machines location I get an error:

Failed to modify service settings

The default virtual machine configuration store cannot be change to '\\computer\sharename\' The network path was not found.

I have check both NTFS and share permissions and both Hyper-v servers have full access to this share. If they hadn't I wouldn't have been able to change the Hard Disk locations.

What am I missing?

Kristopher Turner | Not the brightest bulb but by far not the dimmest bulb.

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Hyper-V WIndows Server 2012 R2 event ID 157 Disk x has been surprise removed using windows backup

November 20, 2013, 6:05 am

≫ Next: Restoring a Full Windows Backup from a USB Drive

≪ Previous: The Default Virtual Machine Configuration Store Cannot be Changed......

I've found a few postings on Event ID 157 for Windows 2012 R2, but no answers

We've upgraded from Server 2012 to 2012 R2. Hyper-V Role. Event ID 157 occurs when Windows Backup is running to backup Hyper-V machines. People have reported the same issue I am having. They have ID 157 occurring only during the Windows Backup process or if they use VSS Snapshots to backup hyper-v virtual machines.

I've found event ID 157 was designed for 2012 R2 Storage Groups when a disk is removed, so it seems like it is a bug showing up during Windows Backup.

One time (out of about 10 now - once each day) that this event was logged, a software RESET was sent to the LSI Mega Raid controller for half of the array and consistency checks were immediately done. I hope this does not happen again.

Everything worked fine before we moved from 2012 to 2012 R2. I've done a clean install and it still happens.

I've looked through the event logs on the virtual machines and we have one Windows 2008 Server running SQL 2008 R2 and it chokes through the entire backup process with hundreds of errors, starting with the SQL VSS Writer receiving a command that it does not understand. From then onward it says tables and data are corrupt, but the normal SQL maintenance job we have running for SQL Server backs up the databases and performs consistenacy checks without issues.

I've just remove the SQL Server from the Windows Backup and will see how it goes tonight.

In case this is related to the SQL Server, here's the error that is 1st logged as soon as the Windows Backup on the host begins:

Event ID 513, CAPI2, Error, Cruptographic Services failed while processing the OnIdentity() call in the System Writer Object.

Details: AddCoreCsiFiles: BeginFileEnumeratrion() failed.

System Error: Access is denied.

After that it freezes the databases, gives dozens of errors for each table, and then restores each table to normal operation.

The Guest SQL server appears to always be the 1st VM to get backed up, so I doubt this has anything to do with it, but thought I should provide as many details as possible, especially when everyone else has discovered it is VSS related and this guest is reporting VSS errors.

What do you think?
thanks
John
P.S. there are no hard drive errors, so running check disk will not help.

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Restoring a Full Windows Backup from a USB Drive

November 7, 2013, 7:57 am

≫ Next: MySQL Performance on a Hyper-V Ubuntu Server

≪ Previous: Hyper-V WIndows Server 2012 R2 event ID 157 Disk x has been surprise removed using windows backup

I am trying to recover a full image backup of a 2012 server into a 2012 Hyper-V VM.

I am RDC'ing into the VM attaching my host's resources, e.g. drives, which I have enabled. The problem is that the VM doesn't see the drive; even the Host doesn't see drive using Explorer. It is only visible in Device Manager and in Windows Backup on the Host.

Is the lack of a drive letter association the issue or something deeper?

In Windows Backup on the host, when selecting a drive to restore from, it is labeled as "develop 2013_08_28 15:17 DISK_01" but without a drive letter. On the VM, neither Explorer, Device Manager or Backup see it.

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MySQL Performance on a Hyper-V Ubuntu Server

November 27, 2013, 7:23 am

≫ Next: Network access not available until about 1 minute after hyper-v (VM) server boots

≪ Previous: Restoring a Full Windows Backup from a USB Drive

Hello,

I'm running Hyper-V Server 2012. My server has an 8-core 4GHZ AMD CPU, and 16gb of ram. I have a guest OS, Ubuntu 12.04 installed. I have two 2TB 7200 RPM hard disks in Raid-1.

I installed a basic LAMP stack on my server and the site that I'm developing is extremely slow. I have narrowed the issue down to MySQL. I have MySQL on a server across my network and everything works fine when I connect this website to that MySQL server. I installed iotop and noticed that disk usage goes very high when I make the request to the page.

I've found the technet post (but I can't paste the link because my account is not verified). I didn't want to change those two options to my hard disk. (Enable write caching on the device and Turn off Windows write-cache buffer flushing on the device)

Any advice is appreciated.

Thanks!

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Network access not available until about 1 minute after hyper-v (VM) server boots

November 26, 2013, 8:25 pm

≫ Next: Hyper-V 2008 R2Disk space issue when copying into a fixed disk.

≪ Previous: MySQL Performance on a Hyper-V Ubuntu Server

Hello,

We just set up a 2012 R2 Host server with about 6 VMs. We are not sharing the nic between the host and the VM - separate nic. It doesn't matter if we boot all VMs at the same time or just boot 1 VM with the others offline. From the Hyper V management console, you can log into the VM but you can't ping locally or to 4.2.2.2 - not using DNS. Takes a minute after the VM boots before you can ping internal or external.

There is no add on software on the nics - e.g. no firewall software on the physical machine or virtual nic. We tried it with Windows firewall on and off - no difference.

We are using the latest drivers

We have all the latest patches from MS.

We tried a different switch - the physical machine does not have this issue - only the VMs exhibit this problem. We tried this with both Broadcom and Intel nics - same issue. Tried with a vanilla hyper v setup from scratch - same issue.

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