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From Peter Lin <wool...@gmail.com>
Subject Re: AccessLogSampler multiple files
Date Thu, 11 Aug 2005 20:40:06 GMT
I will patch the bug and check it into CVS HEAD tonight. you should be
able to pick up the nightly build.


peter lin


On 8/11/05, Ronald Garrett <rgarrett@jstor.org> wrote:
> Definitely seen it. If you run multiple threads in a Thread Group, then
> you can see the same requests scroll by multiple times if you watch the
> Apache access_log. Whether the later threads catch up with the first may
> well be due to server caching.
> 
> 
> -----Original Message-----
> From: Michael Stover [mailto:mstover1@apache.org]
> Sent: Thursday, August 11, 2005 2:55 PM
> To: jmeter-user@jakarta.apache.org
> Subject: Re: AccessLogSampler multiple files
> 
> On Thu, 2005-08-11 at 14:57 -0400, Ronald Garrett wrote:
> > I'm using the AccessLogSampler to simulate actual web traffic. I've
> > gotten it to work reasonably well but still have one problem.
> >
> > If I have multiple threads running on the same jmeter instance, then
> > they will all read from the same file. This means that the web server
> > will get the same requests in the same sequence multiple times (once
> for
> > each thread). This isn't realistic. If the server caches any results,
> > then the later jmeter thread requests will process much faster than
> the
> > first.
> 
> Is this an assumption you're making or did you actually watch it work
> this way?  It doesn't sound like how I remember it working.
> 
> -Mike
> 
> >
> > What I'd like to do is have each thread read from a different file,
> > either specified or randomly selected. Say, you'd enter "access_log.*"
> > into the Access Log Sampler "Log File" field, and the LogParser
> > implementation would randomly choose a specific file that fits that
> > filename pattern. Then each jmeter thread would use requests from a
> > different file, and you're much less likely to get the unrealistic
> > repetition of requests.
> >
> > Does the threaded nature of JMeter allow something like this? Does
> each
> > Thread use the same LogFilter object, or is there one LogFilter object
> > per Thread? Has anyone else come across this problem before and solved
> > it? Is there a better way than I suggest?
> >
> > (BTW, I'm using the 20050807 version of JMeter. Version 2.0.3 has
> > problems with the access log sampler.)
> >
> > Thanks
> >
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> 
> 
> 
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