Invoke-command takes 20-90 seconds to complete
all servers I'm testing with is server 2008r2 with powershell 4. I have a text file with 100 servers that are online and with PS remoting enabled.
When I run this command:
# this takes about 20-30 seconds to complete
Invoke-Command
-ScriptBlock
{get-date}
-ComputerName
(gc
100servers.txt)
# this takes at least 90 seconds to complete when I set throttle to 100
Invoke-Command
-ScriptBlock
{get-date}
-ComputerName
(gc
100servers.txt)
-ThrottleLimit
100
I didn't get these delays when my local was running powershell 2 and executing against the same set of servers with PS4 on them. PS2 only took 2-3 seconds to finish the command if all were online. If I run the command in PS4 ISE, it seems to
work fast as well but for some reason PS4 traditional shell (not ISE) gives me these delays when working with large set of servers and increasing throttle to 100+
Sometimes you get different results if you keep running it with the same shell, but if you open a new shell with -noprofile switch then I get the same execution delays with PS4.
# I even tried skipping the different checks with sessionOption below but same results
Invoke-Command
-ScriptBlock
{get-date}
-ComputerName
(gc
100servers.txt)
-ThrottleLimit
100
-SessionOption
(New-PSSessionOption
-SkipCACheck
-SkipRevocationCheck
-SkipCNCheck)
I also tried running the same command from win8.1 with PS4 and it will hang for about 90 seconds before it spits out all the results at once.
This seems to be a problem with large number of servers of at least 50. Works fine with small set. Is anyone else having this problem? I know there's other ways of running scripts in parallel, but I can't figure out why this is not working.
I'm also using the default pssessionoption below. I have full admin rights to all the servers. Any suggestions?
MaximumConnectionRedirectionCount : 5
NoCompression : False
NoMachineProfile : False
ProxyAccessType : None
ProxyAuthentication : Negotiate
ProxyCredential :
SkipCACheck : False
SkipCNCheck : False
SkipRevocationCheck : False
OperationTimeout : 00:03:00
NoEncryption : False
UseUTF16 : False
IncludePortInSPN : False
OutputBufferingMode : None
Culture :
UICulture :
MaximumReceivedDataSizePerCommand :
MaximumReceivedObjectSize :
ApplicationArguments :
OpenTimeout : 00:03:00
CancelTimeout : 00:01:00
IdleTimeout : -00:00:00.0010000
-asjob only puts it in the background, but it still takes the same amount of time to finish. Any other suggestions? I want to be able to increase the throttle to at least 100 servers. With PS2, I was able to throttle to 200 servers and
was very fast. Not sure why PS4 is so much slower. It seems to run better without increasing the throttle, but still slower when dealing with 100 servers compared to PS2 results.
Invoke-Command
-ScriptBlock
{get-date}
-ComputerName
(gc
100servers.txt)
-ThrottleLimit
100
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First You will encounter the second-hop issue when run "invoke-commmand" as the scriptblock in another remote cmdlet, for more detailed information, please refer to this article:
Enabling Multihop Remoting
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I tested with single cmdlet, and this could work:
If there is anything else regarding this issue, please feel free to post back.
If you have any feedback on our support, please click here.
Best Regards,
Anna Wang
TechNet Community Support -
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Invoke-Command - SQL collation change function
Hi,
I am creating a script to automatically configure SQL servers in Azure from one of the base Azure SQL VM templates. All of my code works well besides changing the default collation of the instance. The PowerShell code works but the problem is that the
command only runs the setup.exe command correctly if I have an open RDP session to the server. I'm trying to figure out why it won't run without the RDP session and either work around it or change the code to something that will work consistently. For
now, I have it open an RDP session but this method won't work in future when I fully automate the scripts.
Here is my code for the ChangeCollation function:
FUNCTION ChangeCollation
param
[Parameter(Mandatory=$true)]$DeploymentName,
[Parameter(Mandatory=$true)]$AdminName,
[Parameter(Mandatory=$true)]$AdminPassword,
[Parameter(Mandatory=$true)]$Collation
Write-Host ("Rebuilding instance collation, setting to $Collation ... ") -ForegroundColor Green
$setup = (Start-Process -FilePath "C:\SQLServer_12.0_Full\Setup.exe" -ArgumentList "/QUIET /ACTION=REBUILDDATABASE /INSTANCENAME=MSSQLSERVER /SQLSYSADMINACCOUNTS=$DeploymentName\$AdminName /SAPWD=$AdminPassword /SQLCOLLATION=$Collation" -NoNewWindow -Wait -PassThru).ExitCode
If ($setup -eq 0) { Write-Host ("Successfully set collation to $Collation") -ForegroundColor Green}
If ($setup -ne 0) { Write-Host ("Failed to set collation to $Collation") -ForegroundColor Red}
I execute it as follows, its in a basic retry loop which tries restarting the services or server if the command fails:
try
Invoke-Command -ConnectionUri $uri.ToString() -Credential $credential -ScriptBlock ${function:ChangeCollation} -ArgumentList $DeploymentName, $AdminName, $AdminPassword, $Collation
$NewCollation = Invoke-Command -ConnectionUri $uri.ToString() -Credential $credential -ScriptBlock {Invoke-SQLCmd "SELECT CONVERT (varchar, SERVERPROPERTY('collation'));"}
$NewCollation = $NewCollation.Column1
If ($Collation -ne $NewCollation)
Throw "Collation not changed exception!"
$Stoploop = $true
}Catch{ .......}
If I have an RDP session open as the local admin which is the same account as I am running the invoke-command with, the setup.exe runs through just fine. Without an RDP session, Invoke waits a minute or two then exits. I can see from the logs on the server
it hasn't tried to change the collation of the instance.
I've tried additional switches on the start-process, like -LoadUserProfile or without -nonewwindow but they made no difference. I have also tried changing the collation with the command sqlservr, seems to work sometimes but its inconsistent
and I don't get the returned result saying that it completed successfully so the code just hangs even after the change.
Does anyone have any idea why an exe wouldn't work via an invoke without the RDP session? Or alternatively a better way to change the collation of the database which is consistent?Hi Federico,
As Ashwin’s post, before changing server level collation, please check that if the existing SQL Server collation setting of your instance is ‘SQL_Latin1_General_CP1_CI_AS’ with the command below.
SELECT SERVERPROPERTY(N'Collation')
Then perform the following steps to change the server level collation and put new collation value.
1. Record all server-wide configuration values by running the below commands and save the output.
SELECT * FROM sys.configurations;
-- OR
EXEC SP_CONFIGURE
2. Create and prepare all scripts related to jobs, maintenance plans, logins and their access levels.
3. Detach all user databases before rebuilding your system databases.
4. Run your original scripts to rebuild the system databases. Make sure to run this command from the directory where you have placed your SQL Server setup files.
5. Check the server collation to verify whether this change is successful or not by running the command “SELECT SERVERPROPERTY(N'Collation') ”
6. Attach all user databases which were detached in Step 3.
7. Change the collation settings of all user databases.
ALTER DATABASE DBName collate <NewCollation>
8. Run all of the which were created in Step 2 to restore jobs, alerts, logins, operators scripts and so on.
For more details, please review the following blog.
How to change server level collation for a SQL Server Instance http://www.mssqltips.com/sqlservertip/2901/how-to-change-server-level-collation-for-a-sql-server-instance/
Thanks,
Lydia Zhang
Lydia Zhang
TechNet Community Support
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