VDI virtualization servers: a separate cluster or a part of a common cluster?

We've bought a new storage system, and I'm in process of rebuilding our Hyper-V virtualization farm. I intend to create a highly available solution based on Hyper-V (Windows Server 2012 R2) clustering technology.
We have only four servers connected to the storage system. I need at least three of them to create a robust cluster of server virtual machines. In addition, I need to deploy a pilot VDI farm for hosting at least 50 workstation VMs. They will need an
entire physical server.
The question is, should I deploy all four servers as a part of a single four-node Hyper-V cluster? Or should I deploy three servers in a three-node cluster for hosting server VMs and then create a single-node cluster for VDI (supposing that it will
be extended with new servers in the future)? The first design is much more robust, but it requires that I give full control over the SC VMM server to a person who manages that VDI installation. I don't want to do it due to security reasons.
Any ideas?
You can perfectly use your Hyper-V cluster just make sure you have properly configured storage as it's IOPS thing that makes or breaks the whole VDI config, modern CPUs have enough of a horsepower to handle virtually any workload and RAM is cheap these days.
Create a 4-node symmetric cluster and make sure you have under provisioned hosts so VDI VMs can move to the other one and it would stall on CPU.
StarWind VSAN [Virtual SAN] clusters Hyper-V without SAS, Fibre Channel, SMB 3.0 or iSCSI, uses Ethernet to mirror internally mounted SATA disks between hosts.

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Hi ,
It is hard for me to answer this .
I am not family with storage , but I think shared storage is needed if you want to build a high availability cluster .
BGDS
Paul

Hyper-V cluster Backup causes virtual machine reboots for common Cluster Shared Volumes members.

I am having a problem where my VMs are rebooting while other VMs that share the same CSV are being backed up. I have provided all the information that I have gather to this point below. If I have missed anything, please let me know.
My HyperV Cluster configuration:
5 Node Cluster running 2008R2 Core DataCenter w/SP1. All updates as released by WSUS that will install on a Core installation
Each Node has 8 NICs configured as follows:
NIC1 - Management/Campus access (26.x VLAN)
NIC2 - iSCSI dedicated (22.x VLAN)
NIC3 - Live Migration (28.x VLAN)
NIC4 - Heartbeat (20.x VLAN)
NIC5 - VSwitch (26.x VLAN)
NIC6 - VSwitch (18.x VLAN)
NIC7 - VSwitch (27.x VLAN)
NIC8 - VSwitch (22.x VLAN)
Following hotfixes additional installed by MS guidance (either while build or when troubleshooting stability issue in Jan 2013)
KB2531907 - Was installed during original building of cluster
KB2705759 - Installed during troubleshooting in early Jan2013
KB2684681 - Installed during troubleshooting in early Jan2013
KB2685891 - Installed during troubleshooting in early Jan2013
KB2639032 - Installed during troubleshooting in early Jan2013
Original cluster build was two hosts with quorum drive. Initial two hosts were HST1 and HST5
Next host added was HST3, then HST6 and finally HST2.
NOTE: HST4 hardware was used in different project and HST6 will eventually become HST4
Validation of cluster comes with warning for following things:
Updates inconsistent across hosts
  I have tried to manually install "missing" updates and they were not applicable
  Most likely cause is different build times for each machine in cluster
   HST1 and HST5 are both the same level because they were built at same time
   HST3 was not rebuilt from scratch due to time constraints and it actually goes back to Pre-SP1 and has a larger list of updates that others are lacking and hence the inconsistency
   HST6 was built from scratch but has more updates missing than 1 or 5 (10 missing instead of 7)
   HST2 was most recently built and it has the most missing updates (15)
Storage - List Potential Cluster Disks
  It says there are Persistent Reservations on all 14 of my CSV volumes and thinks they are from another cluster.
  They are removed from the validation set for this reason. These iSCSI volumes/disks were all created new for
  this cluster and have never been a part of any other cluster.
When I run the Cluster Validation wizard, I get a slew of Event ID 5120 from FailoverClustering. Wording of error:
  Cluster Shared Volume 'Volume12' ('Cluster Disk 13') is no longer available on this node because of
  'STATUS_MEDIA_WRITE_PROTECTED(c00000a2)'. All I/O will temporarily be queued until a path to the
  volume is reestablished.
Under Storage and Cluster Shared VOlumes in Failover Cluster Manager, all disks show online and there is no negative effect of the errors.
Cluster Shared Volumes
We have 14 CSVs that are all iSCSI attached to all 5 hosts. They are housed on an HP P4500G2 (LeftHand) SAN.
I have limited the number of VMs to no more than 7 per CSV as per best practices documentation from HP/Lefthand
VMs in each CSV are spread out amonst all 5 hosts (as you would expect)
Backup software we use is BackupChain from BackupChain.com.
Problem we are having:
When backup kicks off for a VM, all VMs on same CSV reboot without warning. This normally happens within seconds of the backup starting
What have to done to troubleshoot this:
We have tried rebalancing our backups
  Originally, I had backup jobs scheduled to kick off on Friday or Saturday evening after 9pm
  2 or 3 hosts would be backing up VMs (Serially; one VM per host at a time) each night.
  I changed my backup scheduled so that of my 90 VMs, only one per CSV is backing up at the same time
   I mapped out my Hosts and CSVs and scheduled my backups to run on week nights where each night, there
   is only one VM backed up per CSV. All VMs can be backed up over 5 nights (there are some VMs that don't
   get backed up). I also staggered the start times for each Host so that only one Host would be starting
   in the same timeframe. There was some overlap for Hosts that had backups that ran longer than 1 hour.
  Testing this new schedule did not fix my problem. It only made it more clear. As each backup timeframe
  started, whichever CSV the first VM to start was on would have all of their VMs reboot and come back up.
I then thought maybe I was overloading the network still so I decided to disable all of the scheduled backup
and run it manually. Kicking off a backup on a single VM, in most cases, will cause the reboot of common
CSV members.
Ok, maybe there is something wrong with my backup software.
  Downloaded a Demo of Veeam and installed it onto my cluster.
  Did a test backup of one VM and I had not problems.
  Did a test backup of a second VM and I had the same problem. All VMs on same CSV rebooted
Ok, it is not my backup software. Apparently it is VSS. I have looked through various websites. The best troubleshooting
site I have found for VSS in one place it on BackupChain.com (http://backupchain.com/hyper-v-backup/Troubleshooting.html)
I have tested almost every process on there list and I will lay out results below:
  1. I have rebooted HST6 and problems still persist
  2. When I run VSSADMIN delete shadows /all, I have no shadows to delete on any of my 5 nodes
   When I run VSSADMIN list writers, I have no error messages on any writers on any node...
  3. When I check the listed registry key, I only have the build in MS VSS writer listed (I am using software VSS)
  4. When I run VSSADMIN Resize ShadowStorge command, there is no shadow storage on any node
  5. I have completed the registration and service cycling on HST6 as laid out here and most of the stuff "errors"
   Only a few of the DLL's actually register.
  6. HyperV Integration Services were reconciled when I worked with MS in early January and I have no indication of
   further issue here.
  7. I did not complete the step to delete the Subscriptions because, again, I have no error messages when I list writers
  8. I removed the Veeam software that I had installed to test (it hadn't added any VSS Writer anyway though)
  9. I can't realistically uninstall my HyperV and test VSS
  10. Already have latest SPs and Updates
  11. This is part of step 5 so I already did this. This seems to be a rehash of various other stratgies
I have used the VSS Troubleshooter that is part of BackupChain (Ctrl-T) and I get the following error:
  ERROR: Selected writer 'Microsoft Hyper-V VSS Writer' is in failed state!
  - Status: 8 (VSS_WS_FAILED_AT_PREPARE_SNAPSHOT)
  - Writer Failure code: 0x800423f0 (<Unknown error code>)
  - Writer ID: {66841cd4-6ded-4f4b-8f17-fd23f8ddc3de}
  - Instance ID: {d55b6934-1c8d-46ab-a43f-4f997f18dc71}
  VSS snapshot creation failed with result: 8000FFFF
VSS errors in event viewer. Below are representative errors I have received from various Nodes of my cluster:
I have various of the below spread out over all hosts except for HST6
Source: VolSnap, Event ID 10, The shadow copy of volume took too long to install
Source: VolSnap, Event ID 16, The shadow copies of volume x were aborted because volume y, which contains shadow copy storage for this shadow copy, wa force dismounted.
Source: VolSnap, Event ID 27, The shadow copies of volume x were aborted during detection because a critical control file could not be opened.
I only have one instance of each of these and both of the below are from HST3
Source: VSS, Event ID 12293, Volume Shadow Copy Service error: Error calling a routine on a Shadow Copy Provider {b5946137-7b9f-4925-af80-51abd60b20d5}. Routine details RevertToSnashot [hr = 0x80042302, A Volume Shadow Copy Service component encountered an
unexpected error.
Source: VSS, Event ID 8193, Volume Shadow Copy Service error: Unexpected error calling routine GetOverlappedResult. hr = 0x80070057, The parameter is incorrect.
So, basically, everything I have tried has resulted in no success towards solving this problem.
I would appreciate anything assistance that can be provided.
Thanks,
Charles J. Palmer
Wright Flood

Tim,
Thanks for the reply. I ran the first two commands and got this:
Name
Role Metric
Cluster Network 1
3  10000
Cluster Network 2 - HeartBeat                              1   1300
Cluster Network 3 - iSCSI                                    0  10100
Cluster Network 4 - LiveMigration                         1   1200
When you look at the properties of each network, this is how I have it configured:
Cluster Network 1 - Allow cluster network communications on this network and Allow clients to connect through this network (26.x subnet)
Cluster Network 2 - Allow cluster network communications on this network. New network added while working with Microsoft support last month. (28.x subnet)
Cluster Network 3 - Do not allow cluster network communications on this network. (22.x subnet)
Cluster Network 4 - Allow cluster network communications on this network. Existing but not configured to be used by VMs for Live Migration until MS corrected. (20.x subnet)
Should I modify my metrics further or are the current values sufficient.
I worked with an MS support rep because my cluster (once I added the 5th host) stopped being able to live migrate VMs and I had VMs host jumping on startup. It was a mess for a couple of days. They had me add the Heartbeat network as part of the solution
to my problem. There doesn't seem to be anywhere to configure a network specifically for CSV so I would assume it would use (based on my metrics above) Cluster Network 4 and then Cluster Network 2 for CSV communications and would fail back to the Cluster Network
1 if both 2 and 4 were down/inaccessible.
As to the iSCSI getting a second NIC, I would love to but management wants separation of our VMs by subnet and role and hence why I need the 4 VSwitch NICs. I would have to look at adding an additional quad port NIC to my servers and I would be having to
use half height cards for 2 of my 5 servers for that to work.
But, on that note, it doesn't appear to actually be a bandwidth issue. I can run a backup for a single VM and get nothing on the network card (It caused the reboots before any real data has even started to pass apparently) and still the problem occurs.
As to Backup Chain, I have been working with the vendor and they are telling my the issue is with VSS. They also say they support CSV as well. If you go to this page (http://backupchain.com/Hyper-V-Backup-Software.html)
they say they support CSVs. Their tech support has been very helpful but unfortunately, nothing has fixed the problem.
What is annoying is that every backup doesn't cause a problem. I have a daily backup of one of our machines that runs fine without initiating any additional reboots. But most every other backup job will trigger the VMs on the common CSV to reboot.
I understood about the updates but I had to "prove" it to the MS tech I was on the phone with and hence I brought it up. I understand on the storage as well. Why give a warning for something that is working though... I think that is just a poor indicator
that it doesn't explain that in the report.
At a loss for what else I can do,
Charles J. Palmer

Cluster Network Randomly Failing on Hyper-V Cluster

Please let me know if there is a more appropriate forum. I am having a really strange issue that is seemingly random. I have a 3 host cluster that are all identical hardware and running Hyper-V Server 2012 R2. The networking is as follows and each network
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1 Cluster network for cluster traffic/management
1 Heartbeat network
2 iSCSI networks for storage
All of the networks are perfectly fine except for one which seems to fail on a random node at a random time during the day (so far, a maximum of once per day).
If I start to live migrate virtual machines that are on the failed network, the cluster network comes back up. The cluster networks are teamed using SCVMM and they are switch independent and running the Dynamic teaming algorithm. We have tried changing the
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We have 12 Ethernet ports in each server and they are all identical hardware. Four of them are integrated Broadcom, another four that are from a Broadcom quad add-on NIC, and another 4 that are from an Intel quad add-on NIC. All are server grade NIC's. The
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logs don't seem to be speaking in obvious terms to me.
Please let me know if you have any suggestions on how to narrow down what's causing this or if there is more information that I could provide. In the meantime, I'm going to try and take note of which virtual machines are running on the host that has the
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Since I made the change last Friday evening, 4/10, I haven't experienced the issue. I won't be completely convinced that this resolved it until I monitor for at least one more week since it didn't actually present itself for the first time until I was already
one week into live deployment. Also, this link below is much more eloquent than how I put it and describes my issue exactly. Coupled with the KB article that someone posted within this comments section (the same that I posted earlier here) of the article,
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http://alexappleton.net/post/77116755157/hyper-v-virtual-machines-losing-network
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Programmatically create array from common cluster items inside array of clusters

I have seen many questions and responses on dealing with arrays of clusters, but none that discuss quite what I am looking for. I am trying to programmatically create an array from common cluster items inside array of clusters. I have a working solution but looking for a cleaner approach. I have an array of clusters representing channels of data. Each cluster contains a mixture of control data types, i.e.. names, types, range, values, units, etc. The entire cluster is a typedef made up of other typedefs such as the type, range and units and native controls like numeric and boolean. One array is a “block” or module. One cluster is a channel of data. I wrote a small vi to extract all the data with the same units and “pipe” them into another array so that I can process all the data from all the channels of the same units together. It consists of a loop to iterate through the array, in which there is an unbundle by name and a case structure with a case for each unit. Within a specific case, there is a build array for that unit and all the other non-relevant shift registers pass through. As you can see from the attached snapshots, the effort to add an additional unit grows as each non-relevant case must be wired through. It is important to note that there is no default case. My question: Is there a cleaner, more efficient and elegant way to do this?
Thanks in advance!
Solved!
Go to Solution.
Attachments:
NI_Chan units to array_1.png ‏35 KB
NI_Chan units to array_2.png ‏50 KB

nathand wrote:
Your comments made me curious, so I put together a quick test. Maybe there's an error in the code (below as a snippet, and attached as a VI) or maybe it's been fixed in LabVIEW 2013, but I'm consistently getting faster times from the IPE (2-3 ms versus 5-6ms for unbundle/index). See if you get the same results. For fun I flipped the order of the test and got the same results (this is why the snippet and the VI execute the tests in opposite order).
This seems like a poster child for using the IPES! We can look at the index array + replace subset and recognize that it is in place, but the compiler is not so clever (yet!). The bundle/unbundle is a well-known "magic pattern" so it should be roughly equivalent to the IPES, with a tiny penalty due to overhead.
Replace only the array operation with an IPES and leave the bundle/unbundle alone and I wager the times will be roughly the same as using the nested IPES. Maybe even a slight lean toward the magic pattern now if I recall correctly.
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How we can run multiple IOP servers as separate services in iop 4.0.5

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Platform is Windows 2008, SQl Server 2008, ECC Ehp4 SR1
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Regards
Sekhar
Edited by: sekhar on Nov 27, 2009 10:25 AM

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You posted this in the Exchange Forum, your best bet for an answer would be to post this in the Windows Server Forum.
https://social.technet.microsoft.com/Forums/en-US/home?forum=winserverClustering
Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread

How can i get to a specific position in a cluster? (do a Jump in a Cluster)

I have a Cluster of two strings and one Integer: String.name String.value integer.time. I want to do a search for a specific String.name and then start to work with the cluster at this position. Is this possible with simple unbundle by name search in a whileloop for the needed name and then wire the cluster to the output?. I cant and dont want to change the structure of the Cluster itself (to many dependances)! Any suggestions will be nice

Herby Hu:
Not too hard to do.
You are on the right track. I would recommend taking your original
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Doug De Clue
LabVIEW programmer
[email protected]
herbyhu wrote in message news:<[email protected]>...
> I have a Cluster of two strings and one Integer: String.name
> String.value integer.time. I want to do a search for a specific
> String.name and then start to work with the cluster at this position.
> Is this possible with simple unbundle by name search in a whileloop
> for the needed name and then wire the cluster to the output?. I cant
> and dont want to change the structure of the Cluster itself (to many
> dependances)! Any suggestions will be nice

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This article will provide a troubleshooting framework.
http://support.apple.com/kb/TS1398

Real Application Cluster on Sun Solaris 8 and Sun Cluster 3

Hello,
we want to install Oracle 9i Enterprise Edition in combination with Oracle Real Application Cluster-Option on 2 Nodes. Every node (12-CPU-SMP-Machine) should running Sun Solaris 8 and Sun Cluster 3 Service.
Does this configuration work with ORAC? I found nowhere informations about. Is there anything I have to pay special attention for during installation?
Thank you for helping and best regards from Berlin/Germany
Michael Wuttke

Forms and report services work fine on solaris 8.
My problem is on the client side.
I have to use solaris 8 with netscape like forms clients
and I wasn't able to make it work with java plugins.
Any solution?
Mauro

2008 R2 SP1 failover cluster, after connect to VM from failover cluster manager console I've get only upper quourter of screen console

Hello :)
I have to ask because this issue is boring me a long time ago :(
From time to time when I connect to virtual machine from failover cluster manager console I've get virtual machine connection screen (console) which is reduced only to upper left quorter of full screen. There is no scroll bar ... If I live migrate
VM to another node (or restart VM on same node) and reconnect, console screen is displayed ok (ie all console screen is visible).
It is happening regardless of OS version installed into guest VM: 2003 R2, 2008 R2, 2012, 2012 R2).
I've check inside VM ( I can see that integration services are installed and running but when I click onto console window with mouse I've get message:
"Virtual Machine Connection
Mouse not captured in Remote Desktop session
The mouse is available in a Remote Desktop session when
integration services are installed in the guest operating
system...."
From SCVMM console I can see that IC version on guest VM is: 6.1.7601.17514
I would like to know what is going on and is there any way how can I detect those situation or even better how to prevent it ?
Thank you for any idea.
Best regards
Nenad

Hi Nenad,
As you mentioned you have tried 2003 R2, 2008 R2, 2012, 2012 R2 guest vm, but all this do not work properly, With Server 2003 platform the 2008r2 Hyper-V the 2003R2 are not
supported, in your case you must update to Windows Server 2003 R2 with Service Pack 2.
Server 2012 as guest vm on 2008r2 you must install the following hot fix:
You cannot run a Windows 8-based or Windows Server 2012-based virtual machine in Windows Server 2008 R2
https://support2.microsoft.com/kb/2744129?wa=wsignin1.0
Server 2012 is the last version of Windows that will be supported as a guest operating system on 2008r2 Hyper-V therefore the 2012r2 guest vm is not supported.
Please use the following command can query all guest vm’s IC version, please compare this problematic vms IC version with functioning vms.
The following powershell command can be used to display the version of integration services installed on all VMs on the Hyper-V host:
PS C:\Users\administrator> get-vm | ft name, IntegrationServicesVersion
Name
IntegrationServicesVersion
TestVM2012
6.2.9200.16433
SQL01
6.2.9200.16433
SQL02
                                  6.2.9200.16433
SCVMM01
6.2.9200.16384
SCVMM02
6.2.9200.16384
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Windows Server 2012 Cluster Validation Failing On List All Potential Cluster Disks

I'm in the process of setting up a new cluster using Windows Server 2012 with a view to migrate from our existing 2008 R2 cluster. I am having problems validating the storage and the wizard keeps failing on the List All Potential Cluster Disks
test (which causes all the other storage tests to be cancelled).
I'm getting the following error:
Failed while verifying removal of any Persistent Reservation on physical disk 19ba99a4 at node RC-HYPERV-3.riddlesdown.local.
When I look in validation report, disk 19ba99a4 is the management LUN (Access LUN 31 as termed by the storage software).
Looking on my 2008 R2 cluster this doesn't appear in Disk Management.
Any ideas how I can get rid of it or the error that it is causing?

Hi,
Thank you for your question.
I am trying to involve someone familiar with this topic to further look at this issue. There might be some time delay. Appreciate your patience.
Thank you for your understanding and support.
Best Regards,
Aiden
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Sql 2008 r2 cluster side by side with sql 2012 cluster on Windows 2008 R2

We have a SQL 2008R2 active/passive SQL cluster running on Windows 2008 R2 cluster.
I would like to add a SQL 2012 clustered instance to the same Winows 2008 R2 cluster.
Are there any issues involved having a SQL 2008 R2 clustered instance running side by side with a SQL 2012 instance in same Windows 2008 R2 cluster?
Are there any pitfalls/"gotchas" to watch for with SQL 2012 cluster install?
Thank you so much!

Hello,
Two instances, one SQL Server 2008 and the other SQL Server 2012, side-by-side, is fully supported.
I would like to recommend you to assign a different port (not port 1433) to the non-default instance
to avoid an IP address conflict between both instances.
Hope this helps.
Regards,
Alberto Morillo
SQLCoffee.com

VDI virtualization servers: a separate cluster or a part of a common cluster?

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