Top 10 Topics for MSCOM Ops…The TOOL MAN Cometh!! (Part 2)

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More goodness from the MSCOM Ops tool belt…(with lots more to come!). My stars! We are just scratching the surface.

WCAT (Web Capacity Analysis Tool – Very useful web application stress tool for generating stress against a particular URL or a set of URLs. Can be combined with logparser output to simulate traffic against a server using production IIS log files. Available in the IIS 6.0 Resource Kit

https://www.microsoft.com/downloads/details.aspx?FamilyID=56fc92ee-a71a-4c73-b628-ade629c89499&DisplayLang=en

Example:

‘Generate a WCAT UBR file using logparser and production logs, then use the UBR file to stress SERVERNAME with WCAT

                       

 ‘Create the UBR file using logparser against a production IIS log

 Logparser file:WCAT.SQL –o:TPL –tpl:WCAT.TPL

 wcctrl.exe –a SERVERNAME –z stressfile.ubr

 wcclient.exe 127.0.0.1

                       

Wcat.sql

 SELECT TOP 10 

                EXTRACT_TOKEN(cs-uri-query,0,'|') AS Query,

                STRCAT(cs-uri-stem, REPLACE_IF_NOT_NULL(cs-uri-query,STRCAT('?',Query))) AS URI,

                sc-status AS STATUS,

                cs-method AS VERB,

                COUNT(*) AS TOTAL,

                SEQUENCE(1) AS UID 

 INTO StressFile.ubr

 FROM %windir%\system32\logfiles\w3svc1\ex*.log

 WHERE (cs-method = 'GET')

 GROUP BY URI, VERB, STATUS, Query

 ORDER BY TOTAL DESC

Wcat.tpl

 <LPHEADER>[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"

  

 </LPHEADER>

 <LPBODY>

 NEW TRANSACTION

                     classId = %UID%

                     NEW REQUEST HTTP

                     ResponseStatusCode = %STATUS%

                     Weight = %TOTAL%

                     verb = "%VERB%"

         URL = "%URI% 

 </LPBODY>

 <LPFOOTER>

  </LPFOOTER>