Wednesday, August 27, 2008

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RECOMMENDATION FOR IMPLEMENTATION OF XenApp VIRTUALZIACIÓN IN AN ENVIRONMENT OF VMWARE

El presente documento es una recopilación de best practices for implementing XenApp virtual machines hosted on VMware ESX.

1. Installing VMWare Tools: Improved performance of the virtual machine.

2. Disconnect the CD-ROM: This is constantly consulting, consuming unnecessary processor cycles.

3. Eliminate visual effects of virtual machines: Accelerates the response time given to the user.

4. Make a regular disk defragmentation to improve virtual machine performance.

5. Disable COM ports: When used, using additional processing cycles.

6. Make sure the virtual machine always has the RAM needed, if necessary perform a memory allocation per virtual machine Citrix XenApp.

7. It is very important to be careful with sobrecomisionamiento of processing cores, if the physical machine hosts many virtual machines with high demands on processing, it will show problems in scalability and performance of Citrix XenApp virtual machines. If you share processing resources with other machines, it is necessary to ensure that virtual machines have a capacity for growth sufficient and guaranteed to make use of it when we needed. In our experience, we found a better performance of Citrix XenApp virtual machines to allocate dedicated processing cores.

8. If this clone servers have the following Citrix support article http://support.citrix.com/article/CTX107406

9. It is recommended to manually add the following line to the VMX file of each VM Citrix XenApp

    workload = "TerminalServices"

parameter must be validated according to version VMWare used.
10. For machines that run a large number of context switches is recommended to manually add the machine VMX file the following parameter:
    Monitor.idleLoopSpinUS = "n"

where n is a number between 1 and 4000, our experience is well with the value 500. For detailed information on this point see the following links:

http://www.vmware.com/pdf/WS6_Performance_Tuning_and_Benchmarking.pdf
http://kb.vmware.com/selfservice/microsites/search.do? language = en_US & cmd = displayKC & external = 1730


11. It is necessary to verify that the HAL virtual machine is properly configured according to the number of processor cores you have the machine.

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1077

12. You should not use P2V Citrix XenApp server. Make clean facilities.

13. UPHClean installed in virtual machines.
14. Apply policies to redirect my documents, application data and desktop.
15. Limit el tamaño de los archivos temporales de Internet.

Vínculos Recomendados:

Tuesday, August 26, 2008

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implementing VBS Path

Bueno, en algunos scripts es necesario saber la ruta donde nuestro script se esta ejecutando, para realizar acciones adicionales en dicha ruta.

A continuación les dejo unos tips para averiguar las rutas de ejecución:

Full Path
  • script:

      WScript.ScriptFullName wscript.echo path = path

      Sample Output: C: \\ Users \\ Desktop \\ path.vbs
  • Directory Implementation:
    Option 1:

      AbsPath = Replace (WScript.ScriptFullName, WScript.ScriptName, "") wscript.echo
      abspath

      Sample Output: C: \\ Users \\ Desktop \\


    Option 2:

      Set WshShell = CreateObject ("WScript.Shell") WScript.Echo
      WshShell.CurrentDirectory

      Sample Output: C: \\ Users \\ Desktop

    Option 3:

      Set fso = WScript.CreateObject ("Scripting.FileSystemObject") wscript.echo
      fso.GetAbsolutePathName (".")

      Sample Output: C: \\ Users \\ Desktop



Sunday, August 24, 2008

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Invalid namespace [WBEM_E_INVALID_NAMESPACE]

I came across this error on a client ... and not finding much information in my blog I decided to write the solution, after much searching on the net. The error is: Citrix Monitoring Script


Event 2 Citrix MetaFrame Compute Event Rate: WMI error
Connecting to Citrix WMI provider:
Received error: 0x8004100e: Invalid namespace [WBEM_E_INVALID_NAMESPACE]

This error appears every 5 to 10minutes in the event viewer in the application module.

This error is caused by the files MOF (Managed Object Format) for Citrix are now corrupt.

This problem is solved by compiling these files, which are found in the path C: \\ Program Files \\ Citrix \\ System32 \\ Citrix \\ WMI, recompilation is performed by running the following command in the path already mentioned: for%

i in (*. mof, *. mfl) do Mofcomp% i

These files are responsible for delivering information to WMI Classes WMI central warehouse (which stores schema and static instances of WMI objects.)

Mofcomp command is simply a MOF file compiler.

Font1 , Article Citrix

Monday, August 18, 2008

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How does XenApp 4.5? ClearType on XenApp

Visiting Citrix blogs I came across this video, here we can see step by step procedure used for XenApp 4.5 on the logon procedure, display applications, admission to virtualized applications and monitoring system XenApp.
We will see how it interacts
different infrastructure components, among which are the client, the IMA service, XML service, the Health Service and Monitoring and more.

The explanation is provided by Ashish (Principal designer of Citrix Systems).

Sunday, August 10, 2008

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ClearType is a feature designed by Microsoft to improve the user experience and more comfortable reading text on the screens (especially in the LCD), by softening the outline of the text.

This feature could not be enabled in XenApp ICA sessions 4.5 running on Windows 2003, Microsoft explains the problem this way: "The option to enable font smoothing feature to est not available in the version of Windows Server 2003 RDC was published. Windows Server 2003 disables Font smoothing on all remote connections by default . These connections include connections made through RDC 6.0. "

The good thing is we already have solution:
  • You must install the Rollup Pack 02 for XenApp 4.5 and install the hotfix PSE450R02W2K3037
  • must be installed Service Pack 1 or Windows Server 2 2003, install the update KB946633 and when accessing through RDP and not ICA client should be RDP 6.0. After installing this update adds the following registry key:
HKEY_LOCAL_MACHINE \\ SOFTWARE \\ Microsoft \\ Windows NT \\ CurrentVersion \\ Windows \\ TSEnableFontSmoothing

  • If this registry key to 0 will deactivate the feature, if in 1 is enabled. You must restart the server after installing this patch.

These steps of providing a better user experience to help correct some problems with las características de Live Preview y Quick Parts de Office 2007, debido a que requieren ClearType para correr de forma adecuada.

A continuación podemos ver como trabaja ClearType:


Saturday, August 9, 2008

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Use Sunscreen

Una muy buena reflexión, que no se nos olvide que la vida no solo es estudio y trabajo, tenemos que vivir cada día con pasión y felicidad!!! Disfrutenlo!!!!

Sunday, August 3, 2008

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Count the number of users logged into a machine

Este script es muy útil para validar la cantidad de usuarios que estan logueados en un momento dado sobre un servidor.

Ayuda mucho cuando necesitamso know the number of users that a terminal server is supporting us.

'-------------------- ITPROSBOGOTACOLOMBIA
---------------------- '- ----------------- --------------------- THE
'------- Change Program --------------------- ------------ COUNT users logged
strComputer = "." September
objWMI = GetObject ("winmgmts: {impersonationLevel = impersonate}! \\ \\" & StrComputer & "\\ root \\ cimv2") in September
objWMI.ExecQuery colSessions = ("Select * from Win32_LogonSession Where LogonType = 10")
If
colSessions.Count = 0 Then Wscript.Echo "No interactive users found" Else

i = 0 For Each objSession
colSessions in September
objWMI.ExecQuery Collister = ("Associators of" & "{Win32_LogonSession.LogonId =" & objSession.LogonId & "}" & _
"Where AssocClass = Win32_LoggedOnUser Role = Dependent") For Each
objItem in Collister

i = i +1 Next End If


Next Wscript.Echo "Users Logged:" & i

Saturday, August 2, 2008

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script to add path to path

This script is designed to modify the registry key for the path, the first thing is to read the current value and save it to a variable, then remove the current key and creates a new one with the required modification

---------------------- ITPROSBOGOTACOLOMBIA'--------------------
'---- --------------------- --------------- THE RPROGRAMADOR CHANGO
'--------- ROUTE ADD TO PATH ----------- ---------------------


'read registry key and stored in the variable strValue
Const HKEY_LOCAL_MACHINE = & H80000002
'The script is running on the local machine
strComputer = "." September
Oreg = GetObject ("winmgmts: {impersonationLevel = impersonate}! \\ \\" & StrComputer & "\\ root \\ default: StdRegProv")
'Key for the path
strKeyPath = "SYSTEM \\ CurrentControlSet \\ Control \\ Session Manager \\ Environment "
strValueName = "Path"
'Capture the current value
oReg.GetExpandedStringValue HKEY_LOCAL_MACHINE, strKeyPath, strValueName, strValue
' Delete value of the registry key HKEY_LOCAL_MACHINE oReg.DeleteValue
, strKeyPath, strValueName
'Create path
updated addToPath = inputbox ("Enter the route to add the path: "" The Change Program - ITPBC) oReg.SetExpandedStringValue
HKEY_LOCAL_MACHINE, strKeyPath, strValueName, strValue &";"& addToPath

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As part of the new products launched by Citrix market, we find XenDesktop a desktop virtualziación solution provides greater flexibility to organizations delivering desktops (Windows XP, Windows Vista, etc. ..) to users from anywhere they have access to the network.

XenDesktop integrates seamlessly with technologies such as XenServer (Server Virtualization) Provisioning Server (dynamic provisioning of machines) and XenApp (Virtualziación application) to form a complete solution that companies reduce costs, improve user performance , increase mobility in organizations and reduce the environmental impact of energy consumption and production of hardware.

XenDeskop has five different editions: Platinum, Enterprise, Advanced, Standard and Express
, detail of you can find them here .
Similarly all technical documentation necessary for the implementation and administration will find it here .
technology definitely recommend and invite you to taste it!