Coolest VMware video training trailer ever

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Update Manager Client is randomly disabled

Products: VMware Update Manager

Product Versions: VMware VirtualCenter 2.5.x


  • Update Manager Client is randomly disabled
  • Update Manager Client is not working

  • The following error is generated:

    session with the VMware Update Manager is no longer valid. The VMware
    Update Manager Client plugin will be unloaded from the VI Client.


To prevent Update Manager from being randomly disabled, check if there is antivirus software running on the system.

Exclude the Update Manager download
repository from antivirus scanning. For more information about
excluding items from antivirus scanning, contact your antivirus
software vendor.

Note: If your problem
still exists after trying the steps in this article, please file a
support request with VMware Support and note this KB Article ID in the
problem description. For more information, see How to Submit a Support Request.

Via: VMware KB >>

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VMware product name changes

  1. VMware VirtualCenter is now VMware vCenter Server
  2. VMware vCenter is the family name for all management products
  3. VMware Lab Manager is now VMware vCenter Lab Manager (since it is in the management products family)
  4. The VMware vCenter prefix applies to the other products in the management products family as well
  5. VMware View is the family name for all VDI/VDM products
  6. VMware VDI is now VMware View
  7. VMware VDM is now VMware View Manager

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Configuration Maximums for Virtual Infrastructure 3

Configuration Maximums for Virtual Infrastructure 3
is by far one of my favorite VMware documents.  This is a useful
document for the VMware evangelist and any VMware VI administrator to
have tacked up on the wall of their office for use as a quick
reference.  It’s also handy for identifying platform comparison points
of discussion or decision.

The document answers most of the “How many…”, “How much…” type
questions about the VMware Virtual Infrastructure capabilities (ESX
hypervisor, VirtualCenter, guest VMs, etc.)  more than once I’ve used
this document as the basis for interactive VMware trivia sessions at
our local VMware User Group meetings.  This is one of the documents
that will most often be updated as new releases of VMware VI are
released so it’s a good one to keep tabs on.

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Citrix XenServer im Praxistest – XenServer 5 Installation und Konfiguration

Seit September 2008 ist die Version 5.0 des XenServers verfügbar. Citrix hat diese Version gründlich überarbeitet und mit neuen Funktionen ausgestattet. TecChannel hat sich XenServer 5 in einem Test für Sie angesehen.
Xen ist eine Plattform zur Rechnervirtualisierung für x86-Computer. Es wurde ursprünglich von der University of Cambridge entwickelt und dann in die Obhut der Open Source Community übergeben. Funktional steht Xen in Wettbewerb mit dem ESX-Server von VMware und dem Hyper-V von Microsoft. Mehr zu diesen Produkten lesen Sie in den TecChannel-Beiträgen Microsoft Hyper-V, Herausforderer in Sachen Virtualisierung und Workshop: VMWare ESX-Server.

Die Vertriebspartner des Produkts reichern, dem Open-Source-Gedanken entsprechend, Xen um weitere Funktionen an und vermarkten es dann als Produkt. Diese Aufgabe hatte für Xen ursprünglich das Unternehmen XenSource übernommen. Dieses Unternehmen wurde im August 2007 von Citrix aufgekauft. Citrix bietet Xen seither unter dem Namen XenServer an. Die Version 4.0.1 des XenServers erschien kurz nach der Übernahme durch Citrix. Seit Mitte September 2008 ist die Version 5.0 des XenServers verfügbar.
Gegenüber der Open-Source-Variante von Xen hat Citrix dabei vor allem Werkzeuge zur einfacheren Verwaltung von Xen dazugepackt. Dazu zählt das XenCenter. Diese GUI-basierte Managementkonsole fasst alle Funktionen zur Verwaltung der virtuellen Maschinen und auch der Hostsysteme in einer Konsole zusammen.

Die Neuerungen des XenServer 5

Zu den Neuerungen der Version 5.0 gehört der Support für weitere Gastsysteme wie etwa:
  • Windows Server 2008 32-Bit und 64-Bit
  • Windows XP Service Pack 3, Windows Vista Service Pack 1,
  • SUSE Enterprise Linux 9 SP4 32-Bit, SUSE Enterprise Linux 10 SP1/2 64-Bit
  • Red Hat Enterprise Linux 4.7 32-Bit und Red Hat Enterprise Linux 5.2 32-bit/64-Bit

Reichlich Auswahl: XenServer 5 unterstützt jede Menge Betriebssysteme als Gast.

Reichlich Auswahl: XenServer 5 unterstützt jede Menge Betriebssysteme als Gast.
Verbesserungen gibt es auch hinsichtlich der Hochverfügbarkeit. So können die Ressource Pools nun hochverfügbar ausgelegt werden. Außerdem lässt sich die Startreihenfolge der virtuellen Maschinen nach einem Ausfall des Hosts durch Prioritäten bestimmen.
Durch eine redundante Storage-Anbindung via Multipath werden Engpässe des Speichers abgefedert. Auch bei der Anbindung des Storage ergeben sich Verbesserungen: Jetzt unterstützt XenServer auch Speicheranbindungen durch QLogic und Emulex 8 GByte Fibre Channel HBA. Auch das NIC-Bonding für die Netzanbindung soll Ausfälle oder Engpässe vermeiden. Neu sind zudem der Bootloader und die xsconsole. Durch den neuen Loader hat man beispielsweise Zugriff auf erweiterte Bootoptionen.

First views of VMware View 3


VMware View 3 was just released. (press release, product page).

VMware’s Rick Westrate starts us off with a good tour. Link: A New “View” of Virtual Desktop Computing | Virtual Insanity.

just reprint the marketing press releases, I thought I would
highlight some of the key new features of View3, give a short
explanation, and add some initial thoughts. As the (borrowed) graphic
below shows, “View3” really is the umbrella name that covers all the
components of the total solution. View
Manager 3 is the desktop broker that sets up and manages connections
between end users and back-end desktop virtual machines. Let’s dig into
some of these features.

Dave Stiles likes what he’s seen so far. Link: Virtually Dave » Welcome to the View from VMware’s perspective.

Many of our customers who have been thinking about
virtualization or who are current VMware VDM 2.X users are going to
find the new feature set substantially enhances their experience. …
VMware View when coupled with VMware ThinApp truly enables the
compute on demand desktop experience many of us have heard about for so
long. …

Secondly and more importantly, the ability to build and reference
off a single master image with linked clones is going to save a lot of
time in deployment, management, and disk space costs.  …

Third, View is really a multi-purpose front-end load balancer.  No
longer is View just the connection broker for virtual machines, it can
be the front end for Terminal Servers and PCs.  This is a big
enhancement, many of our customers are going to like.  The ability to
use the SSL tunneling provided for under VDM and continued in view is
really going to be a full on security solution for remote office

And last but not least, the feature I have been longing for the most, offline desktop. …

Brian Madden also gives us his „60 second overview“. Link: VMware releases their new VDI product, View 3. Here’s a 60-second overview – Brian Madden –
He notes these advantages over Citrix, although he rightly points out
that VMware hasn’t yet delivered on all that we previewed at VMworld

  • A lot (a mean a whole lot, like 75%) of customers who use Citrix
    XenDesktop run it on VMware’s infrastructure. If that’s the case, then
    VMware is a much cheaper solution, at only $150 for the edition of View
    3 that includes everything.
  • VMware’s extensions to RDP, plus the ThinPrint stuff they’ve
    licensed, means that Citrix does not have as much as an advantage with
    ICA anymore.

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CSI: Lawrence Fishburne vor seinem ersten Einsatz

Lawrence Fishburne steht bei der US-Krimi-Serie „CSI: Crime Scene Investigation“ vor seinem ersten Einsatz.

Welcome in the … CSI-Matrix, Lawrence.

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Understanding VMware Roles and Permissions

VMware Virtualcenter roles and permissions are one
of the most commonly misunderstood aspects of Virtual Infrastructure
3.  We constantly receive calls into tech support asking how-to assign
the appropriate rights to users and their virtual machines, clusters,

A new article I saw on VIOPS today that helps one understand some of
the basic premises of permissions and roles. Sometimes a good overview
like this one, written from thirty-thousand feet, helps one solidify
VMware’s security model in one’s mind. The article is broken down into
major sections:

  1. Concepts
  2. Definitions
  3. Datastores and Networks have no direct privileges
  4. Definitions
  5. VMs inherit privileges from two sources
  6. Clusters and Hosts implicitly are resource pool
  7. Privileges Needed to Create a Virtual Machine
  8. Privileges Needed for various Inventory Manipulations

Anything to help understand VMware’s roles and permissions is a good thing. Read VI3 Roles and Permissions

Concepts behind this are explained in the paper Management VirtualCenter Roles and Permissions.

Related posts:

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  2. VirtualCenter 2.5 Upgrade Database Issues With the recent release of VirtualCenter 2.5 many customers are anxious to…
  3. How does the VMware HA work Here’s a quick summary of how High Availability (HA) works in VMware…
  4. VirtualCenter Best Practices VMworld 2007 has come and gone, but if you missed it, many…
  5. HA Failover Capacity We get an enormous amount of questions about VMware’s HA (High Availability),…

This post brought to you by VMwarewolf

Understanding VMware Roles and Permissions

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Common Licensing issues in VMware Infrastructure


Continuing my Resolution Path series, here is another download for you all, this time in the Licensing area of VI3. Download the zipfile here and keep it handy for the next time you run into any license related issues.

Down the left side in yellow are common problems we get calls on. To the right of each problem are the steps you would take to resolve the problem. I have included hyperlinks to help get you to the answers fast.

Common Licensing issues in VMware Infrastructure


VMware ACE Licensing Scenarios


FAQ: VMware ACE 2.0.x Licensing


Using Your ACE Option Pack


Not enough licenses installed


VMware Products in VI3.5 Foundation, Standard and Enterprise Editions


Check installed licenses on the VMware Infrastructure Client


Distinction between License Administrator (LA) and Support
Administrator (SA)


Verifying licenses are activated according to the current feature need


Installing ESX Server Licenses


How to Combine FLEXlm License Files


Attempting to add a host to VirtualCenter produces a license error


Troubleshooting an error when uploading a license file


Understanding VI3.5 Licensing: Server- and Host-Based Licensing Models


How to Combine FLEXlm License Files


Cannot Power on virtual machines on an ESX host


Setting the ESX Server Edition


Configuring License Source


Troubleshooting Missing or Incorrect Licenses on the Portal


Verifying purchased licenses meet current need


Registering a License Key


Distinction between License Administrator (LA) and Support
Administrator (SA)


VMware Partner Activation Codes (PAC) Explained


Troubleshooting why you cannot connect an ESX host to VirtualCenter –
Not enough licenses installed


Importance of VirtualCenter License


Attempting to add a host to VirtualCenter produces a license error


Check installed licenses on the VMware Infrastructure Client


Verifying licenses are activated according to the current feature need


Installing ESX Server Licenses


Testing network connectivity with the Ping command


Troubleshooting a License Server that has stopped responding


Starting License Server and VirtualCenter Server services


Testing network connectivity with the Ping command


Troubleshooting a VMware Infrastructure Client Administration console
that shows Evaluation after Commercial Licenses are installed


Disabling VMware ESX 3.5 and VirtualCenter 2.5 Evaluations


Verifying licenses are activated according to the current feature need


Installing ESX Server Licenses


Troubleshooting an ESX host that cannot connect to Lab Manager Server


Activating Lab Manager Licenses


Ensuring the ESX host is not in Evaluation Mode


Cannot power on an ESX virtual machine after a migration


Investigating if an ESX virtual machine is powered on


Investigating power on permissions for ESX virtual machines


Determining if a virtual machine is orphaned


Verifying ESX virtual machine file integrity


Investigating ESX virtual machine resources


Virtual machine hardware versions


Troubleshooting host architecture incompatibility


Validating the .vmx settings of a virtual machine

Brought to you by VMware and Virtualization Technical Discussions from a VMware Technical Support Engineer

Thanks to vmwarewolf

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Slow performance of virtual machines that use vSMP when running on an ESX Server using certain hardware

VMware ESX
Product Versions
VMware ESX 3.0.x
VMware ESX 3.5.x

  • Rebooting a virtual machine that has multiple vCPUs takes significantly longer than a single vCPU on an ESX Server when using certain hardware
  • Slow performance of virtual machines that use more than one vCPU on an ESX Server when using certain hardware

    Caution: The most noticeable symptom is your virtual machine taking a significant amount of time to reboot, but it does not take significant amount of time if it is a fresh power on. If you are not seeing slow reboot times of virtual machines, this article does not apply to you. Do not turn off pagesharing if you are not experiencing these symptoms.


This issue occurs because of changes in the architecture of certain CPUs. These changes affect the way that ESX Servers perform COW (Copy-on-Write) memory operations when using vSMP in a virtual machine.
There are two common ways to workaround this problem. Perform one of the following workarounds:
  • Instead of rebooting the virtual machine, power-off and then power it back on. By doing this the problem is not noticed because the COW memory is cleared and repopulated upon startup of the virtual machine.

  • Alternatively, you can disable pagesharing which resolves the slow performance. Pagesharing is used to reclaim duplicated memory pages across and within virtual machines. With pagesharing disabled we no longer share memory in this way, therefore the virtual machine consumes more physical memory because all memory pages are duplicated for each virtual machine running on the ESX host.

    Note: Turning pagesharing off can potentially cause an increase in the amount of swapping if you are overcommitting the ESX host memory resources.

    To disable page sharing on the ESX Server:

    1. Log in to VirtualCenter (or the ESX Server directly) with an administrative account using the VMware Infrastructure Client.
    2. Click on the ESX Server that you want to disable page sharing on.
    3. Click the Configuration tab.
    4. Click the Advanced Settings link.
    5. Click Mem in the Advanced Settings window.
    6. Look for the Mem.ShareScanGHz option and set the value to 0.

      Note: By default Mem.ShareScanGHz is set to 4.

    7. Click OK.
    8. Reboot the ESX host.
VMware engineering is currently investigating this behavior in more depth. A permanent fix is expected in a future release of ESX.

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