## Copyright (C) 1999 by USC/ISI# All rights reserved.                                            #                                                                # Redistribution and use in source and binary forms are permitted# provided that the above copyright notice and this paragraph are# duplicated in all such forms and that any documentation, advertising# materials, and other materials related to such distribution and use# acknowledge that the software was developed by the University of# Southern California, Information Sciences Institute.  The name of the# University may not be used to endorse or promote products derived from# this software without specific prior written permission.# # THIS SOFTWARE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED# WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.# ## Maintainer: Polly Huang <huang@isi.edu># Version Date: $Date: 1999/10/26 16:51:56 $## @(#) $Header: /nfs/jade/vint/CVSROOT/ns-2/tcl/ex/large-scale-web-traffic-old.tcl,v 1.1 1999/10/26 16:51:56 haoboy Exp $ (USC/ISI)### An example script that simulates large-scale web traffic. # See web-traffic.tcl for a smaller scale web traffic simulation.# Some attributes:# 1. Topology: ~460 nodes, 420 web clients, 40 web servers# 2. Traffic: approximately 200,000 TCP connections, heavy-tailed connection #             sizes, throughout 4200 second simulation time# 3. Simulation scale: ~800 MB memory, ~1.5-2 hrs running on FreeBSD 3.0#              Pentium II Xeon 450 MHz PC with 1GB physical memory#puts "Warning!!!! Warning!!!!"puts "This simulation requires ~800 MB MEMORY to complete!!"puts "If this machine has less than 800 MB physical memory,"puts "expect this simulation to finish in a DAY or so."source ../http/http-mod.tclglobal num_node n verboseset verbose 0source varybell.tcl# Basic ns setupset ns [new Simulator]$ns set-address 10 21# Create generic packet trace$ns trace-all [open large-scale-web-traffic.out w]create_topology########################### Modify From Here ####################### Number of Sessions## set numSession 400set numSession 400## Inter-session Intervalset interSession [new RandomVariable/Exponential]$interSession set avg_ 1## Number of Pages per Sessionset sessionSize [new RandomVariable/Constant]$sessionSize set val_ 250set launchTime [$ns now]for {set i 0} {$i < $numSession} {incr i} {    set numPage [$sessionSize value]    set httpSession($i) [new HttpSession $ns $numPage [$ns picksrc]]## Inter-Page Interval    $httpSession($i) setDistribution interPage_ Exponential 15## Number of Objects per Page    $httpSession($i) setDistribution pageSize_ Constant 1    $httpSession($i) createPage## Inter-Object Interval    $httpSession($i) setDistribution interObject_ Exponential 0.01## Number of Packets per Object    $httpSession($i) setDistribution objectSize_ ParetoII 12 1.2    $ns at [expr $launchTime + 0.1] "$httpSession($i) start"    set launchTime [expr $launchTime + [$interSession value]]}## Start the simulation$ns at 4200.1 "exit 0"$ns run