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• Stresstesting ASP.NET/IIS with WCAT

  - by MartinHN

  I'm trying to setup a stress/load test using the WCAT toolkit included in the IIS Resources. Using LogParser, I've processed a UBR file with configuration. It looks something like this: [Configuration] NumClientMachines: 1 # number of distinct client machines to use NumClientThreads: 100 # number of threads per machine AsynchronousWait: TRUE # asynchronous wait for think and delay Duration: 5m # length of experiment (m = minutes, s = seconds) MaxRecvBuffer: 8192K # suggested maximum received buffer ThinkTime: 0s # maximum think-time before next request WarmupTime: 5s # time to warm up before taking statistics CooldownTime: 6s # time to cool down at the end of the experiment [Performance] [Script] SET RequestHeader = "Accept: */*\r\n" APP RequestHeader = "Accept-Language: en-us\r\n" APP RequestHeader = "User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705)\r\n" APP RequestHeader = "Host: %HOST%\r\n" NEW TRANSACTION classId = 1 NEW REQUEST HTTP ResponseStatusCode = 200 Weight = 45117 verb = "GET" URL = "http://Url1.com" NEW TRANSACTION classId = 3 NEW REQUEST HTTP ResponseStatusCode = 200 Weight = 13662 verb = "GET" URL = "http://Url1.com/test.aspx" Does it look OK? I execute the controller with this command: wcctl -z StressTest.ubr -a localhost The Client(s) is executed like this: wcclient localhost When the client is executed, I get this error: main client thread Connect Attempt 0 Failed. Error = 10061 Has anyone in this world ever used WCAT?

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• Unable to run WCAT against DotNetNuke with NTLM authentication

  - by David Neale

  I have a ubr file setup to stress test an internal DotNetNuke site with WCAT: transaction { id = "Intranet Home Page"; weight = 1000; cookies{clear = true;} sleep{delay = rand("1","500");} request { url = "/"; statuscode = 401; } request { url = "/"; authentication = ntlm; username = "mydomain\\accountname"; password = "password"; statuscode = 200; } close{ method = reset;} } When running this (wcat.wsf -run -clients localhost -s myserver -t test.ubr -f settings.ubr -x) I simply get lots of error 500s: 2010-03-08 10:29:31 192.168.11.239 GET / - 80 - 192.168.52.139 - 401 2 2148074254 2010-03-08 10:29:31 192.168.11.239 GET / - 80 - 192.168.52.139 - 401 1 0 2010-03-08 10:29:31 192.168.11.239 GET /Default.aspx - 80 mydomain\myaccount 192.168.52.139 - 500 0 0 DNN is reporting these errors as: AssemblyVersion: 5.2.3 PortalID: 0 PortalName: My Company UserID: -1 UserName: ActiveTabID: 39 ActiveTabName: Home RawURL: /Default.aspx AbsoluteURL: /Default.aspx AbsoluteURLReferrer: UserAgent: DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider ExceptionGUID: 28d8821f-1ef2-41db-8a65-d33e97a69130 InnerException: *Unhandled Error:* FileName: FileLineNumber: 0 FileColumnNumber: 0 Method: DotNetNuke.Authentication.ActiveDirectory.HttpModules.AuthenticationModule.OnAuthenticateRequest StackTrace: Message: System.Exception: Unhandled Error: --- System.NullReferenceException: Object reference not set to an instance of an object. at DotNetNuke.Authentication.ActiveDirectory.HttpModules.AuthenticationModule.OnAuthenticateRequest(Object s, EventArgs e) at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) --- End of inner exception stack trace --- Source: Server Name: MYSERVER It seems to be losing the username somehow.

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• How to create WCAT extension DLL

  - by TonyP

  Need to create WCAT extension DLL that query database for next available record nubmber and feed back it into senario request POSTed Data.. How would do that.. Thanks in advance

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• Is there a way to simulate a remote AMF call with WCAT?

  - by Lieven Cardoen

  I managed to use WCAT to test an url for an aspx page getting an asset. Now I would like to use it to test a remote call to WebORB from Flex. Problem is I don't know what to put in RequestData, RequestHeader, ... If I look with Charles (HTTP Monitor), then it's impossible to copy paste the request data (it has squares and all kind of weird characters that can't be copy paste to my txt file).

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• Performance mitigations serving content from a UNC share via IIS 6

  - by codepoke

  I have a quad processor vmware instance running Windows 2003 and 1gb ethernet. I'm comparing serving the exact same heavy .NET 2.0 content from the local hard drive versus serving it from a UNC drive. If I use WCAT to load it down, I see about a 40% reduction in transactions/sec while serving from the UNC. Processor time barely moves from 45% and the NIC sits around 40% either way. I don't see any significant memory loading either way. Context Switches/Transaction, though, more than doubles when serving from the UNC. Pathlengths more than double as well, but I believe that's just an expression of the effect of context switching. All told, it looks like the bottleneck is processor switching while waiting on content from the UNC share. Is my experience about the norm? Is there some mitigation I might try? I twiddled HKLM\System\CurrentControlSet\Services\LanmanWorkstation\Parameters\MaxCmds a little bit per http://technet.microsoft.com/en-us/library/dd296694(WS.10).aspx, but to no obvious effect. I kind of doubt my problem is lack of connections, but rather just the act of switching from thread to thread while waiting on data.

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