1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
#
# Copyright (c) 1997 by the University of Southern California
# All rights reserved.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License,
# version 2, as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
#
# The copyright of this module includes the following
# linking-with-specific-other-licenses addition:
#
# In addition, as a special exception, the copyright holders of
# this module give you permission to combine (via static or
# dynamic linking) this module with free software programs or
# libraries that are released under the GNU LGPL and with code
# included in the standard release of ns-2 under the Apache 2.0
# license or under otherwise-compatible licenses with advertising
# requirements (or modified versions of such code, with unchanged
# license). You may copy and distribute such a system following the
# terms of the GNU GPL for this module and the licenses of the
# other code concerned, provided that you include the source code of
# that other code when and as the GNU GPL requires distribution of
# source code.
#
# Note that people who make modified versions of this module
# are not obligated to grant this special exception for their
# modified versions; it is their choice whether to do so. The GNU
# General Public License gives permission to release a modified
# version without this exception; this exception also makes it
# possible to release a modified version which carries forward this
# exception.
#
# $Header: /cvsroot/nsnam/ns-2/tcl/ex/simple-webcache-comp.tcl,v 1.2 2005/09/16 03:05:41 tomh Exp $
#
# Example script illustrating the usage of complex page in webcache.
# Thanks to Xiaowei Yang <yxw@mercury.lcs.mit.edu> for motivation and
# an original version of this script.
Agent/TCP/FullTcp set segsize_ 1460
Http set TRANSPORT_ FullTcp
set ns [new Simulator]
set f [open "comp.tr" w]
$ns namtrace-all $f
set log [open "comp.log" w]
$ns rtproto Session
set node(c) [$ns node]
set node(r) [$ns node]
set node(s) [$ns node]
$ns duplex-link $node(s) $node(r) 100Mb 25ms DropTail
$ns duplex-link $node(r) $node(c) 10Mb 25ms DropTail
[$ns link $node(s) $node(r)] set queue-limit 10000
[$ns link $node(r) $node(s)] set queue-limit 10000
[$ns link $node(c) $node(r)] set queue-limit 10000
[$ns link $node(r) $node(c)] set queue-limit 10000
# Use PagePool/CompMath to generate compound page, which is a page
# containing multiple embedded objects.
set pgp [new PagePool/CompMath]
$pgp set main_size_ 1000 ;# Size of main page
$pgp set comp_size_ 5000 ;# Size of embedded object
$pgp set num_pages_ 3 ;# Number of objects per compoud page
# Average age of component object: 100s
set tmp [new RandomVariable/Constant]
$tmp set val_ 100
$pgp ranvar-obj-age $tmp
# Average age of the main page: 50s
set tmp [new RandomVariable/Constant]
$tmp set val_ 50
$pgp ranvar-main-age $tmp
set server [new Http/Server/Compound $ns $node(s)]
$server set-page-generator $pgp
$server log $log
set client [new Http/Client/Compound $ns $node(c)]
set tmp [new RandomVariable/Constant]
$tmp set val_ 10
$client set-interval-generator $tmp
$client set-page-generator $pgp
$client log $log
set startTime 1 ;# simulation start time
set finishTime 500 ;# simulation end time
$ns at $startTime "start-connection"
$ns at $finishTime "finish"
proc start-connection {} {
global ns server client
$client connect $server
# Comment out following line to continuously send requests
$client start-session $server $server
# Comment out following line to send out ONE request
# DON't USE with start-session!!!
#set pageid $server:[lindex [$client gen-request] 1]
#$client send-request $server GET $pageid
}
proc finish {} {
global ns log f client server
$client stop-session $server
$client disconnect $server
$ns flush-trace
flush $log
close $log
exit 0
}
$ns run
|
