Re: [ns] pagePool/WebTraf - about parameters

[Xuan Chen <xuanc@ISI.EDU>]

On Mon, 6 Aug 2001, Sergio Andreozzi wrote:

> Hi everybody!
>
> considering large-scale-web-traffic.tcl example,  could you please explain
> me $objSize and $interObj meaning?
$objSize means the size of web object (like a image or text, icon, etc) in
the unit of packet,
$interObj means the time between two objects are retrived.

> And what about avg_ and shape_ attributes?
They are parameters for a parto II distributed random variable.

Thanks,
-chen xuan

>
>
> .....
>
> # Create sessions
> $pool set-num-session $numSession
> set launchTime 0
> for {set i 0} {$i < $numSession} {incr i} {
> 	set numPage [$sessionSize value]
> 	puts "Session $i has $numPage pages"
> 	set interPage [new RandomVariable/Exponential]
> 	$interPage set avg_ 15
> 	set pageSize [new RandomVariable/Constant]
> 	$pageSize set val_ 1
> 	set interObj [new RandomVariable/Exponential]
> 	$interObj set avg_ 0.01
> 	set objSize [new RandomVariable/ParetoII]
> 	$objSize set avg_ 12
> 	$objSize set shape_ 1.2
> 	$pool create-session $i $numPage [expr $launchTime + 0.1] \
> 	$interPage $pageSize $interObj $objSize
> 	set launchTime [expr $launchTime + [$interSession value]]
> }
>
> ........
>
>
>
> Thanks,
>
> 	Sergio
>

-- 
Xuan Chen
USC/ISI