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