Re: Curl-loader results vary from time to time

[alo s. <asi...@ic...>]

Hi Robert,

Thanks for your reply and appreciate it. I have upgraded the test 
client's RAM from 2 gig to 4 gig and now it gives me a kind of 
consistent result, though it varies a little. I have followed the FAQ 
sec 7.2 recommendations but that didn't make any big difference.

Now, i have another question: what is the best configuration for testing 
50 000, 60 000, 70 000, 100 000 requests. Currently i am using the 
following configuration,

########### GENERAL SECTION ################################
BATCH_NAME= 15Kr6 
CLIENTS_NUM_MAX=15000
CLIENTS_NUM_START=100
CLIENTS_RAMPUP_INC=75
INTERFACE   =eth0   
NETMASK=16 
IP_ADDR_MIN= 10.0.1.240
IP_ADDR_MAX= 10.0.1.240
CYCLES_NUM= 1
URLS_NUM= 1

########### URL SECTION ####################################

URL=http://xx.x.x.xxx:pppp/main
URL_SHORT_NAME="SA-home"
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 =0

My test client is:
Linux
Operating System:    CentOS release 5.2 (Final)
CPU:    Intel(R) Core(TM)2 Duo CPU     E4600  @ 2.40GHz
Ram:    4 Gigabytes DDR2

My hosting server is:
Linux
Operating System:    CentOS release 5 (Final)
CPU:    Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz
Ram:    4 Gigabytes DDR2

Please let me know the optimum and best configurations for testing 
really big loads. The reason why i am asking this question is, when i 
put CLIENTS_RAMPUP_INC=50, it takes more time but less failed. when i 
put CLIENTS_RAMPUP_INC=75, it takes less time and more failed. And 
because of it, i am not able to come to a conclusion with respect to the 
runtime and number of failed requests. Most of the time, it throws the 
Connection time-out error in the log file. Again when i increased the 
TIMER_URL_COMPLETION, it didn't make big difference.

Greatly appreciate your reply..

Thanks,
Alo



Robert Iakobashvili wrote:
> Hi Alo,
>
>
> On Thu, Oct 30, 2008 at 3:17 PM, alo sinnathamby 
> <asi...@ic... <mailto:asi...@ic...>> wrote:
>
>     Hi Robert,
>
>     Thanks for your immediate reply and appreciate it. I am looking at
>     your
>     suggestions and in the mean time please find below the conf file
>     for the
>     tests that i run,
>     Greatly appreciate your help.
>
>
> The suggestions are:
> a) to all at the erors in SAH10000r5.log, what is written there, when 
> there are errors;
> b) look in FAQs about increasing performance on a client side (file 
> descriptors), etc
>    for a big load -optimization;
> c) look at your server side;
>
> See others embedded:
>
>     ########### GENERAL SECTION ################################
>     BATCH_NAME=SAH10000r5
>     CLIENTS_NUM_MAX = 10000
>
>
> Each client requires about 40K memory, which means, that your 4GB 
> memory is not
> enough.
> Working with more than 4000-5000 clients requires doing the Big-Load 
> optimizations
> as in FAQs.
>
> Try to work lets say with 1000-5000  clients and to make Big-Load 
> optimizations.
>
>
>     CLIENTS_NUM_START = 50
>     CLIENTS_RAMPUP_INC= 50
>     INTERFACE=eth0
>     NETMASK=24
>     IP_ADDR_MIN=10.0.1.240 <http://10.0.1.240>
>     IP_ADDR_MAX=10.0.1.240 <http://10.0.1.240>
>     CYCLES_NUM= 1
>     URLS_NUM=1
>
>
> Really you are running more than one cycle, are not you?
>
> -- 
> Truly,
> Robert Iakobashvili, Ph.D.
> ......................................................................
> Assistive technology that understands you
> ......................................................................

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