PVS: Streamed OS Optimization

Use the following to optimize the streamed OS.

Must-Have: DisableTaskOffload

CTX117491: Execssive Retries Occur on PVS Target

$strRegPath = "HKLM:\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters"
Set-ItemProperty -Path $strRegPath -Name "DisableTaskOffload" -Value "1" -Type DWORD

Must-Have: Disable IPv6

Do so for each adapter to prevent slow boots and logons, in addition to other intermittent issues.

It can be scripted with NVSPBIND, by setting it in each individual adapter, or with the following command line:
reg add hklm\system\currentcontrolset\services\tcpip6\parameters /v DisabledComponents /t REG_DWORD /d 0xFFFFFFFF

You may also use the following PowerShell code:
$strRegPath = "HKLM:\SYSTEM\CurrentControlSet\Services\TcpIp6\Parameters"
Set-ItemProperty -Path $strRegPath -Name "DisabledComponents" -Value "0xffffffff" -Type DWORD

Must-Have: ESXi 5.1+ - Increase UDP FastSend Threshold

KB2040065: Reduce UDP resends
$strRegPath = "HKLM\System\CurrentControlSet\Services\Afd\Parameters"
Set-ItemProperty -Path $strRegPath -Name "FastSendDatagramThreshold" -Value "1500" -Type DWORD

Must-Have: ESXi 5.5.1 and below - Disable Receive Side Scaling

KB2055853: VMXNET3 resets frequently when RSS is enabled in a Windows virtual machine
Solution: Update ESXi to 5.5 Update 1

Must-Have: Server 2008 R2 - Reduce impact heavy UDP traffic on vCPU

KB2685007: High CPU usage occurs when a Windows Server 2008 R2-based server is under a very heavy UDP load

$strRegPath = "HKLM:\SYSTEM\CurrentControlSet\Services\BFE\Parameters"
Set-ItemProperty -Path $strRegPath -Name "MaxEndpointCountMult" -Value "0x10" -Type DWORD

Must-Have: Reduce IOSRequestThreads when using PVS 7.6

CTX200952: High Amount of Retries Shown when Using Private Mode or Maintenance Version in PVS 7.6

$strRegPath = "HKLM:SYSTEM\CurrentControlSet\Services\BNIStack\Parameters"
Set-ItemProperty -Path $strRegPath -Name "IosRequestThreads" -Value "0x2" -Type DWORD

Value: 2 (If that does not improve, try 1)