Re: Trying to simulate browser behavior.

[Robert I. <cor...@gm...>]

Hi Prahav,

On Tue, Jul 1, 2008 at 10:55 PM, Pranav Desai <pra...@gm...>
wrote:

> Hello,
>
> I am trying to simulate a browser behavior for accessing a front page
> (e.g. www.cnn.com). From traces I see that a few requests go over the
> same TCP connections (persistence) and in general there are a few TCP
> connections made for completely fetching the whole front page.
>
> config file
> -----------
> BATCH_NAME=test_load
> CLIENTS_NUM_MAX=1 # Same as CLIENTS_NUM
> CLIENTS_NUM_START=1
> CLIENTS_RAMPUP_INC=2
> INTERFACE   =eth1
> NETMASK=16
> IP_ADDR_MIN= 12.0.0.1
> IP_ADDR_MAX= 12.0.16.250 #Actually - this is for self-control
> CYCLES_NUM=1
> URLS_NUM=14
>
> ########### URL SECTION ####################################
>
> URL=
> http://192.168.55.205/websites/cisco/www.cisco.com/cdc_content_elements/flash/home/sp_072307/spotlight/sp_webEx_tn.jpg
> URL=
> http://192.168.55.205/websites/cisco/www.cisco.com/cdc_content_elements/flash/home/sp_072307/spotlight/sp_CIN.swf
> FRESH_CONNECT=1
>
> URL=
> http://192.168.55.205/websites/cisco/www.cisco.com/cdc_content_elements/flash/home/sp_072307/spotlight/sp_webEx.swf
>
> URL=http://192.168.55.205/websites/cisco/www.cisco.com/cdc_content_elements/flash/home/sp_072307/spotlight/sp_humanN_anthem_tn.jpg
> URL=http://192.168.55.205/websites/MOO/backfeed10.gif
> TIMER_AFTER_URL_SLEEP=2000-5000
> URL=http://192.168.55.205/websites/MOO/bottom.gif
> URL=http://192.168.55.205/websites/MOO/style3.css
> URL=http://192.168.55.205/websites/MOO/topright.gif
> FRESH_CONNECT=1
>
> URL=http://192.168.55.205/websites/MOO/rss_smaller.gif
> URL=http://192.168.55.205/websites/MOO/index.html.6
> TIMER_AFTER_URL_SLEEP=2000-5000
>
> URL=http://192.168.55.205/websites/cnn/www.cnn.com/.element/ssi/www/breaking_news/2.0/banner.html
> URL=
> http://192.168.55.205/websites/cnn/www.cnn.com/.element/ssi/auto/2.0/sect/MAIN/ftpartners/partner.people.html
> TIMER_AFTER_URL_SLEEP=2000-5000
> URL=
> http://192.168.55.205/websites/cnn/www.cnn.com/.element/ssi/auto/2.0/sect/MAIN/ftpartners/partner.money.txt
> URL=
> http://192.168.55.205/websites/cnn/www.cnn.com/.element/img/2.0/global/icons/video_icon.gif
>
>
I am not sure, that the syntax of URL section you are using is correct.

Please, try to re-write the configuration file keeping for each
URL section it's own parameters, something like below:

URL=http://localhost/ACE-INSTALL.html #
http://localhost/apache2-default/ACE-INSTALL.html
URL_SHORT_NAME=" ACE"
REQUEST_TYPE=GET
TIMER_URL_COMPLETION = 0
TIMER_AFTER_URL_SLEEP =0
FRESH_CONNECT=1

 URL= http://localhost/index.html
 URL_SHORT_NAME=" INDEX"
 REQUEST_TYPE=GET
 TIMER_URL_COMPLETION = 0 # In msec. When positive, Now it is enforced by
cancelling url fetch on timeout
 TIMER_AFTER_URL_SLEEP =1000
FRESH_CONNECT=1

>From the HTTP point of view GET requests may still go via the same TCP/IP
connection.
What we should expect from FRESH_CONNECT=1 is that the connection will be
closed
and re-established at each loading cycle.

In general connections are the matter of libcurl library, where it is
keeping some 5-10
connections minimum, which is govern my MAX_CONNECTIONS flag logic.

What happens with the connection policy, when you are trying e.g. 50, 100
virtual clients?

-- 
Truly,
Robert Iakobashvili, Ph.D.
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Assistive technology that understands you
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