LAMPIRAN
SCRIPT PROGRAM SINGLE SERVER
1. Single Server Server
#Pembuatan jaringan CDN
set ns [new Simulator]
set f [open out.tr w] $ns trace-all $f
set nf [open out.nam w] $ns namtrace-all $nf
$ns duplex-link $n0 $n3 5Mb 2ms DropTail $ns duplex-link $n1 $n3 5Mb 2ms DropTail $ns duplex-link $n2 $n3 5Mb 2ms DropTail $ns duplex-link $n10 $n3 1.5Mb 10ms DropTail $ns duplex-link $n9 $n10 1.5Mb 10ms DropTail $ns duplex-link $n10 $n16 1.5Mb 10ms DropTail $ns duplex-link $n10 $n11 1.5Mb 10ms DropTail $ns duplex-link $n10 $n17 1.5Mb 10ms DropTail $ns duplex-link $n3 $n4 1.5Mb 10ms DropTail $ns duplex-link $n4 $n5 1.5Mb 10ms DropTail $ns duplex-link $n4 $n11 1.5Mb 10ms DropTail $ns duplex-link $n5 $n6 1.5Mb 10ms DropTail $ns duplex-link $n6 $n7 1.5Mb 10ms DropTail $ns duplex-link $n6 $n8 1.5Mb 10ms DropTail $ns duplex-link $n11 $n12 1.5Mb 10ms DropTail $ns duplex-link $n12 $n13 1.5Mb 10ms DropTail $ns duplex-link $n12 $n14 1.5Mb 10ms DropTail $ns duplex-link $n12 $n15 1.5Mb 10ms DropTail $ns duplex-link $n11 $n18 1.5Mb 10ms DropTail $ns duplex-link $n18 $n19 1.5Mb 10ms DropTail $ns duplex-link $n18 $n20 1.5Mb 10ms DropTail $ns duplex-link $n5 $n21 1.5Mb 10ms DropTail $ns duplex-link $n5 $n22 1.5Mb 10ms DropTail
$ns duplex-link-op $n0 $n3 orient right-up $ns duplex-link-op $n1 $n3 orient right-down $ns duplex-link-op $n2 $n3 orient down $ns duplex-link-op $n10 $n3 orient up $ns duplex-link-op $n9 $n10 orient right-up $ns duplex-link-op $n10 $n11 orient right $ns duplex-link-op $n10 $n16 orient down $ns duplex-link-op $n10 $n17 orient right-down $ns duplex-link-op $n3 $n4 orient right
$ns duplex-link-op $n6 $n7 orient right-up $ns duplex-link-op $n6 $n8 orient right $ns duplex-link-op $n11 $n12 orient right $ns duplex-link-op $n12 $n13 orient right-up $ns duplex-link-op $n12 $n14 orient right $ns duplex-link-op $n12 $n15 orient right-down $ns duplex-link-op $n11 $n18 orient right-down $ns duplex-link-op $n18 $n19 orient left-down $ns duplex-link-op $n18 $n20 orient right-down $ns duplex-link-op $n5 $n21 orient right-up $ns duplex-link-op $n5 $n22 orient left-up
$ns duplex-link-op $n2 $n3 queuePos 0.5
#Penambahan Background Traffic
set udp0 [new Agent/UDP] $ns attach-agent $n0 $udp0
set cbr0 [new Application/Traffic/CBR] $cbr0 attach-agent $udp0
set udp1 [new Agent/UDP] $ns attach-agent $n3 $udp1 $udp1 set class_ 1
set cbr1 [new Application/Traffic/CBR] $cbr1 attach-agent $udp1
set udp2 [new Agent/UDP] $ns attach-agent $n9 $udp2 $udp2 set class_ 2
set cbr2 [new Application/Traffic/CBR] $cbr2 attach-agent $udp2
set udp3 [new Agent/UDP] $ns attach-agent $n16 $udp3 $udp3 set class_ 3
set cbr3 [new Application/Traffic/CBR] $cbr3 attach-agent $udp3
set cbr4 [new Application/Traffic/CBR] $cbr4 attach-agent $udp4
set udp5 [new Agent/UDP] $ns attach-agent $n7 $udp5 $udp5 set class_ 5
set cbr5 [new Application/Traffic/CBR] $cbr5 attach-agent $udp5
set udp6 [new Agent/UDP] $ns attach-agent $n14 $udp6 $udp6 set class_ 6
set cbr6 [new Application/Traffic/CBR] $cbr6 attach-agent $udp6
set udp7 [new Agent/UDP] $ns attach-agent $n13 $udp7 $udp7 set class_ 7
set cbr7 [new Application/Traffic/CBR] $cbr7 attach-agent $udp7
set udp8 [new Agent/UDP] $ns attach-agent $n1 $udp8 $udp8 set class_ 8
set cbr8 [new Application/Traffic/CBR] $cbr8 attach-agent $udp8
set null0 [new Agent/Null] $ns attach-agent $n14 $null0
set null1 [new Agent/Null] $ns attach-agent $n13 $null1
set null2 [new Agent/Null] $ns attach-agent $n8 $null2
set null3 [new Agent/Null] $ns attach-agent $n20 $null3
set null5 [new Agent/Null] $ns attach-agent $n20 $null5
set null6 [new Agent/Null] $ns attach-agent $n21 $null6
set null7 [new Agent/Null] $ns attach-agent $n22 $null7
set null8 [new Agent/Null] $ns attach-agent $n17 $null8
$ns connect $udp0 $null0 $ns connect $udp1 $null1 $ns connect $udp2 $null2 $ns connect $udp3 $null3 $ns connect $udp4 $null4 $ns connect $udp5 $null5 $ns connect $udp6 $null6 $ns connect $udp7 $null7 $ns connect $udp8 $null8
#Penambahan Traffic Video
# creation trace traffic
set max_fragmented_size 1024
#add udp header(8 bytes) and IP header (20bytes) set packetSize 1052
set original_file_name trafik set trace_file_name video1.dat
set original_file_id [open $original_file_name r] set trace_file_id [open $trace_file_name w] set pre_time 0
while {[eof $original_file_id] == 0} { gets $original_file_id current_line
scan $current_line "%d%s%d%d%f" no_ frametype_ length_ tmp1_ tmp2_ set time [expr int(($tmp2_ - $pre_time)*1000000.0)]
if { $frametype_ == "I" } { set type_v 1
set prio_p 0 }
set type_v 2
puts $trace_file_id "$time $length_ $type_v $prio_p $max_fragmented_size" set pre_time $tmp2_
}
close $original_file_id close $trace_file_id set end_sim_time $tmp2_ puts "$end_sim_time"
set trace_file [new Tracefile]
$trace_file filename $trace_file_name
#Sistem Load Balancer
#Attach video to server #create source traffic
#Create a UDP agent and attach it to node n0 set udp_0 [new Agent/myUDP]
$udp_0 set_filename udpSend0 $udp_0 set packetSize_ 1052
$ns attach-agent $n2 $udp_0 ;#Server 2
set udp_1 [new Agent/myUDP] $udp_1 set_filename udpSend1 $udp_1 set packetSize_ 1052
$ns attach-agent $n2 $udp_1 ;#Server 2
set udp_7 [new Agent/myUDP] $udp_7 set_filename udpSend7 $udp_7 set packetSize_ 1052
set udp_8 [new Agent/myUDP] $udp_8 set_filename udpSend8 $udp_8 set packetSize_ 1052
$ns attach-agent $n2 $udp_8 ;#Server 2
set udp_9 [new Agent/myUDP] $udp_9 set_filename udpSend9 $udp_9 set packetSize_ 1052
$ns attach-agent $n2 $udp_9 ;#Server 2
set udp_14 [new Agent/myUDP] $udp_14 set_filename udpSend14 $udp_14 set packetSize_ 1052
$ns attach-agent $n2 $udp_14 ;#Server 2
set udp_15 [new Agent/myUDP] $udp_15 set_filename udpSend15 $udp_15 set packetSize_ 1052
$ns attach-agent $n2 $udp_15 ;#Server 2
set udp_16 [new Agent/myUDP] $udp_16 set_filename udpSend16 $udp_16 set packetSize_ 1052
$ns attach-agent $n2 $udp_16 ;#Server 2
set udp_19 [new Agent/myUDP] $udp_19 set_filename udpSend19 $udp_19 set packetSize_ 1052
$ns attach-agent $n2 $udp_19 ;#Server 2
set udp_21 [new Agent/myUDP] $udp_21 set_filename udpSend21 $udp_21 set packetSize_ 1052
$ns attach-agent $n2 $udp_21 ;#Server 2
# Attach video traffic source
set video0 [new Application/Traffic/myEvalvid] $video0 attach-tracefile $trace_file
$video0 attach-agent $udp_0
$video1 attach-tracefile $trace_file $video1 attach-agent $udp_1
set video2 [new Application/Traffic/myEvalvid] $video2 attach-tracefile $trace_file
$video2 attach-agent $udp_7
set video3 [new Application/Traffic/myEvalvid] $video3 attach-tracefile $trace_file
$video3 attach-agent $udp_8
set video4 [new Application/Traffic/myEvalvid] $video4 attach-tracefile $trace_file
$video4 attach-agent $udp_9
set video5 [new Application/Traffic/myEvalvid] $video5 attach-tracefile $trace_file
$video5 attach-agent $udp_14
set video6 [new Application/Traffic/myEvalvid] $video6 attach-tracefile $trace_file
$video6 attach-agent $udp_15
set video7 [new Application/Traffic/myEvalvid] $video7 attach-tracefile $trace_file
$video7 attach-agent $udp_16
set video8 [new Application/Traffic/myEvalvid] $video8 attach-tracefile $trace_file
$video8 attach-agent $udp_19
set video9 [new Application/Traffic/myEvalvid] $video9 attach-tracefile $trace_file
$video9 attach-agent $udp_21
# Create the Null agent to sink traffic set null_0 [new Agent/myEvalvid_Sink] $null_0 set_filename udpRec0
$ns attach-agent $n0 $null_0
$ns attach-agent $n1 $null_1
set null_7 [new Agent/myEvalvid_Sink] $null_7 set_filename udpRec7
$ns attach-agent $n7 $null_7
set null_8 [new Agent/myEvalvid_Sink] $null_8 set_filename udpRec8
$ns attach-agent $n8 $null_8
set null_9 [new Agent/myEvalvid_Sink] $null_9 set_filename udpRec9
$ns attach-agent $n9 $null_9
set null_14 [new Agent/myEvalvid_Sink] $null_14 set_filename udpRec14
$ns attach-agent $n14 $null_14
set null_15 [new Agent/myEvalvid_Sink] $null_15 set_filename udpRec15
$ns attach-agent $n15 $null_15
set null_16 [new Agent/myEvalvid_Sink] $null_16 set_filename udpRec16
$ns attach-agent $n16 $null_16
set null_19 [new Agent/myEvalvid_Sink] $null_19 set_filename udpRec19
$ns attach-agent $n19 $null_19
set null_21 [new Agent/myEvalvid_Sink] $null_21 set_filename udpRec21
$ns attach-agent $n21 $null_21
# Attach the 2 agents
$ns connect $udp_16 $null_16 $ns connect $udp_19 $null_19 $ns connect $udp_21 $null_21
$ns at 1.0 "$cbr0 start" $ns at 6.1 "$cbr1 start" $ns at 1.3 "$cbr2 start" $ns at 2.6 "$cbr3 start" $ns at 1.8 "$cbr4 start" $ns at 3.0 "$cbr5 start" $ns at 2.1 "$cbr6 start" $ns at 5.2 "$cbr7 start" $ns at 7.3 "$cbr8 start"
$ns at 4.0 "$cbr5 stop" $ns at 5.1 "$cbr6 stop" $ns at 5.8 "$cbr7 stop"
#Evaluated traffics $ns at 2.0 "$video0 start" $ns at 2.5 "$video1 start" $ns at 3.0 "$video2 start" $ns at 3.5 "$video3 start" $ns at 4.0 "$video4 start" $ns at 4.5 "$video5 start" $ns at 5.0 "$video6 start" $ns at 5.5 "$video7 start" $ns at 6.0 "$video8 start" $ns at 6.5 "$video9 start"
set tcp [new Agent/TCP] $tcp set class_ 2
set sink [new Agent/TCPSink] $ns attach-agent $n0 $tcp $ns attach-agent $n3 $sink $ns connect $tcp $sink
set ftp [new Application/FTP] $ftp attach-agent $tcp
$ns at 1.2 "$ftp start"
puts [$cbr0 set packetSize_] puts [$cbr0 set interval_]
$ns at 500.0 "finish"
proc finish {} { global ns f nf $ns flush-trace close $f close $nf
puts "running nam..." exec nam out.nam & exit 0
}
LAMPIRAN
SCRIPT PROGRAM LEAST CONNECTION
set ns [new Simulator]
$ns color 0 pink $ns namtrace-all $nf
$ns duplex-link $n1 $n3 5Mb 2ms DropTail $ns duplex-link $n2 $n3 5Mb 2ms DropTail $ns duplex-link $n10 $n3 1.5Mb 10ms DropTail $ns duplex-link $n9 $n10 1.5Mb 10ms DropTail $ns duplex-link $n10 $n16 1.5Mb 10ms DropTail $ns duplex-link $n10 $n11 1.5Mb 10ms DropTail $ns duplex-link $n10 $n17 1.5Mb 10ms DropTail $ns duplex-link $n3 $n4 1.5Mb 10ms DropTail $ns duplex-link $n4 $n5 1.5Mb 10ms DropTail $ns duplex-link $n4 $n11 1.5Mb 10ms DropTail $ns duplex-link $n5 $n6 1.5Mb 10ms DropTail $ns duplex-link $n6 $n7 1.5Mb 10ms DropTail $ns duplex-link $n6 $n8 1.5Mb 10ms DropTail $ns duplex-link $n11 $n12 1.5Mb 10ms DropTail $ns duplex-link $n12 $n13 1.5Mb 10ms DropTail $ns duplex-link $n12 $n14 1.5Mb 10ms DropTail $ns duplex-link $n12 $n15 1.5Mb 10ms DropTail $ns duplex-link $n11 $n18 1.5Mb 10ms DropTail $ns duplex-link $n18 $n19 1.5Mb 10ms DropTail $ns duplex-link $n18 $n20 1.5Mb 10ms DropTail $ns duplex-link $n5 $n21 1.5Mb 10ms DropTail $ns duplex-link $n5 $n22 1.5Mb 10ms DropTail
$ns duplex-link-op $n0 $n3 orient right-up $ns duplex-link-op $n1 $n3 orient right-down $ns duplex-link-op $n2 $n3 orient down $ns duplex-link-op $n10 $n3 orient up $ns duplex-link-op $n9 $n10 orient right-up $ns duplex-link-op $n10 $n11 orient right $ns duplex-link-op $n10 $n16 orient down $ns duplex-link-op $n10 $n17 orient right-down $ns duplex-link-op $n3 $n4 orient right
$ns duplex-link-op $n4 $n5 orient right-up $ns duplex-link-op $n4 $n11 orient down $ns duplex-link-op $n5 $n6 orient right $ns duplex-link-op $n6 $n7 orient right-up $ns duplex-link-op $n6 $n8 orient right $ns duplex-link-op $n11 $n12 orient right $ns duplex-link-op $n12 $n13 orient right-up $ns duplex-link-op $n12 $n14 orient right $ns duplex-link-op $n12 $n15 orient right-down $ns duplex-link-op $n11 $n18 orient right-down $ns duplex-link-op $n18 $n19 orient left-down $ns duplex-link-op $n18 $n20 orient right-down $ns duplex-link-op $n5 $n21 orient right-up $ns duplex-link-op $n5 $n22 orient left-up
set udp0 [new Agent/UDP] $ns attach-agent $n0 $udp0
set cbr0 [new Application/Traffic/CBR] $cbr0 attach-agent $udp0
set udp1 [new Agent/UDP] $ns attach-agent $n3 $udp1 $udp1 set class_ 1
set cbr1 [new Application/Traffic/CBR] $cbr1 attach-agent $udp1
set udp2 [new Agent/UDP] $ns attach-agent $n9 $udp2 $udp2 set class_ 2
set cbr2 [new Application/Traffic/CBR] $cbr2 attach-agent $udp2
set udp3 [new Agent/UDP] $ns attach-agent $n16 $udp3 $udp3 set class_ 3
set cbr3 [new Application/Traffic/CBR] $cbr3 attach-agent $udp3
set udp4 [new Agent/UDP] $ns attach-agent $n19 $udp4 $udp4 set class_ 4
set cbr4 [new Application/Traffic/CBR] $cbr4 attach-agent $udp4
set udp5 [new Agent/UDP] $ns attach-agent $n7 $udp5 $udp5 set class_ 5
set cbr5 [new Application/Traffic/CBR] $cbr5 attach-agent $udp5
set udp6 [new Agent/UDP] $ns attach-agent $n14 $udp6 $udp6 set class_ 6
set cbr6 [new Application/Traffic/CBR] $cbr6 attach-agent $udp6
set udp7 [new Agent/UDP] $ns attach-agent $n13 $udp7 $udp7 set class_ 7
set udp8 [new Agent/UDP] $ns attach-agent $n1 $udp8 $udp8 set class_ 8
set cbr8 [new Application/Traffic/CBR] $cbr8 attach-agent $udp8
set null0 [new Agent/Null] $ns attach-agent $n14 $null0
set null1 [new Agent/Null] $ns attach-agent $n13 $null1
set null2 [new Agent/Null] $ns attach-agent $n8 $null2
set null3 [new Agent/Null] $ns attach-agent $n20 $null3
set null4 [new Agent/Null] $ns attach-agent $n14 $null4
set null5 [new Agent/Null] $ns attach-agent $n20 $null5
set null6 [new Agent/Null] $ns attach-agent $n21 $null6
set null7 [new Agent/Null] $ns attach-agent $n22 $null7
set null8 [new Agent/Null] $ns attach-agent $n17 $null8
$ns connect $udp0 $null0 $ns connect $udp1 $null1 $ns connect $udp2 $null2 $ns connect $udp3 $null3 $ns connect $udp4 $null4 $ns connect $udp5 $null5 $ns connect $udp6 $null6 $ns connect $udp7 $null7 $ns connect $udp8 $null8
# creation trace traffic
set max_fragmented_size 1024
#add udp header(8 bytes) and IP header (20bytes) set packetSize 1052
set trace_file_name video1.dat
set original_file_id [open $original_file_name r] set trace_file_id [open $trace_file_name w] set pre_time 0
while {[eof $original_file_id] == 0} { gets $original_file_id current_line
scan $current_line "%d%s%d%d%f" no_ frametype_ length_ tmp1_ tmp2_ set time [expr int(($tmp2_ - $pre_time)*1000000.0)]
if { $frametype_ == "I" } {
puts $trace_file_id "$time $length_ $type_v $prio_p $max_fragmented_size" set pre_time $tmp2_
}
close $original_file_id close $trace_file_id set end_sim_time $tmp2_ puts "$end_sim_time"
set trace_file [new Tracefile]
$trace_file filename $trace_file_name
#Attach video to server #create source traffic
#Create a UDP agent and attach it to node n0 set udp_0 [new Agent/myUDP]
$udp_0 set_filename udpSend0 $udp_0 set packetSize_ 1052
$ns attach-agent $n2 $udp_0 ;#Server 2
set udp_1 [new Agent/myUDP] $udp_1 set_filename udpSend1 $udp_1 set packetSize_ 1052
set udp_4 [new Agent/myUDP] $udp_4 set_filename udpSend7 $udp_4 set packetSize_ 1052
$ns attach-agent $n2 $udp_4 ;#Server 2
set udp_7 [new Agent/myUDP] $udp_7 set_filename udpSend8 $udp_7 set packetSize_ 1052
$ns attach-agent $n2 $udp_7 ;#Server 2
set udp_2 [new Agent/myUDP] $udp_2 set_filename udpSend9 $udp_2 set packetSize_ 1052
$ns attach-agent $n20 $udp_2 ;#Server 20
set udp_5 [new Agent/myUDP] $udp_5 set_filename udpSend14 $udp_5 set packetSize_ 1052
$ns attach-agent $n20 $udp_5 ;#Server 20
set udp_8 [new Agent/myUDP] $udp_8 set_filename udpSend15 $udp_8 set packetSize_ 1052
$ns attach-agent $n20 $udp_8 ;#Server 20
set udp_3 [new Agent/myUDP] $udp_3 set_filename udpSend16 $udp_3 set packetSize_ 1052
$ns attach-agent $n22 $udp_3 ;#Server 22
set udp_6 [new Agent/myUDP] $udp_6 set_filename udpSend19 $udp_6 set packetSize_ 1052
$ns attach-agent $n22 $udp_6 ;#Server 22
set udp_9 [new Agent/myUDP] $udp_9 set_filename udpSend21 $udp_9 set packetSize_ 1052
$ns attach-agent $n22 $udp_9 ;#Server 22
# Attach video traffic source
set video0 [new Application/Traffic/myEvalvid] $video0 attach-tracefile $trace_file
$video0 attach-agent $udp_0
set video1 [new Application/Traffic/myEvalvid] $video1 attach-tracefile $trace_file
set video2 [new Application/Traffic/myEvalvid] $video2 attach-tracefile $trace_file
$video2 attach-agent $udp_2
set video3 [new Application/Traffic/myEvalvid] $video3 attach-tracefile $trace_file
$video3 attach-agent $udp_3
set video4 [new Application/Traffic/myEvalvid] $video4 attach-tracefile $trace_file
$video4 attach-agent $udp_4
set video5 [new Application/Traffic/myEvalvid] $video5 attach-tracefile $trace_file
$video5 attach-agent $udp_5
set video6 [new Application/Traffic/myEvalvid] $video6 attach-tracefile $trace_file
$video6 attach-agent $udp_6
set video7 [new Application/Traffic/myEvalvid] $video7 attach-tracefile $trace_file
$video7 attach-agent $udp_7
set video8 [new Application/Traffic/myEvalvid] $video8 attach-tracefile $trace_file
$video8 attach-agent $udp_8
set video9 [new Application/Traffic/myEvalvid] $video9 attach-tracefile $trace_file
$video9 attach-agent $udp_9
# Create the Null agent to sink traffic set null_0 [new Agent/myEvalvid_Sink] $null_0 set_filename udpRec0
$ns attach-agent $n0 $null_0
set null_1 [new Agent/myEvalvid_Sink] $null_1 set_filename udpRec1
$ns attach-agent $n1 $null_1
set null_7 [new Agent/myEvalvid_Sink] $null_7 set_filename udpRec7
$ns attach-agent $n7 $null_7
$ns attach-agent $n8 $null_8
set null_9 [new Agent/myEvalvid_Sink] $null_9 set_filename udpRec9
$ns attach-agent $n9 $null_9
set null_14 [new Agent/myEvalvid_Sink] $null_14 set_filename udpRec14
$ns attach-agent $n14 $null_14
set null_15 [new Agent/myEvalvid_Sink] $null_15 set_filename udpRec15
$ns attach-agent $n19 $null_15
set null_16 [new Agent/myEvalvid_Sink] $null_16 set_filename udpRec16
$ns attach-agent $n19 $null_16
set null_19 [new Agent/myEvalvid_Sink] $null_19 set_filename udpRec19
$ns attach-agent $n19 $null_19
set null_21 [new Agent/myEvalvid_Sink] $null_21 set_filename udpRec21
$ns attach-agent $n21 $null_21
# Attach the 2 agents
$ns connect $udp_0 $null_0 $ns connect $udp_1 $null_1 $ns connect $udp_2 $null_7 $ns connect $udp_3 $null_8 $ns connect $udp_4 $null_9 $ns connect $udp_5 $null_14 $ns connect $udp_6 $null_15 $ns connect $udp_7 $null_16 $ns connect $udp_8 $null_19 $ns connect $udp_9 $null_21
$ns at 4.0 "$cbr5 stop" $ns at 5.1 "$cbr6 stop" $ns at 5.8 "$cbr7 stop"
#Evaluated traffics $ns at 2.0 "$video0 start" $ns at 2.5 "$video1 start" $ns at 3.0 "$video2 start" $ns at 3.4 "$video3 start" $ns at 3.8 "$video4 start" $ns at 4.0 "$video5 start" $ns at 4.5 "$video6 start" $ns at 5.0 "$video7 start" $ns at 5.5 "$video8 start" $ns at 6.0 "$video9 start"
set tcp [new Agent/TCP] $tcp set class_ 2
set sink [new Agent/TCPSink] $ns attach-agent $n0 $tcp $ns attach-agent $n3 $sink $ns connect $tcp $sink
set ftp [new Application/FTP] $ftp attach-agent $tcp
$ns at 1.2 "$ftp start"
$ns at 1.35 "$ns detach-agent $n0 $tcp ; $ns detach-agent $n3 $sink"
puts [$cbr0 set packetSize_] puts [$cbr0 set interval_]
$ns at 500.0 "finish"
proc finish {} { global ns f nf $ns flush-trace close $f close $nf
puts "running nam..." exec nam out.nam & exit 0
}
LAMPIRAN
SCRIPT PROGRAM ROUND ROBIN
set ns [new Simulator]
$ns color 0 pink $ns namtrace-all $nf
$ns duplex-link $n1 $n3 5Mb 2ms DropTail $ns duplex-link $n2 $n3 5Mb 2ms DropTail $ns duplex-link $n10 $n3 1.5Mb 10ms DropTail $ns duplex-link $n9 $n10 1.5Mb 10ms DropTail $ns duplex-link $n10 $n16 1.5Mb 10ms DropTail $ns duplex-link $n10 $n11 1.5Mb 10ms DropTail $ns duplex-link $n10 $n17 1.5Mb 10ms DropTail $ns duplex-link $n3 $n4 1.5Mb 10ms DropTail $ns duplex-link $n4 $n5 1.5Mb 10ms DropTail $ns duplex-link $n4 $n11 1.5Mb 10ms DropTail $ns duplex-link $n5 $n6 1.5Mb 10ms DropTail $ns duplex-link $n6 $n7 1.5Mb 10ms DropTail $ns duplex-link $n6 $n8 1.5Mb 10ms DropTail $ns duplex-link $n11 $n12 1.5Mb 10ms DropTail $ns duplex-link $n12 $n13 1.5Mb 10ms DropTail $ns duplex-link $n12 $n14 1.5Mb 10ms DropTail $ns duplex-link $n12 $n15 1.5Mb 10ms DropTail $ns duplex-link $n11 $n18 1.5Mb 10ms DropTail $ns duplex-link $n18 $n19 1.5Mb 10ms DropTail $ns duplex-link $n18 $n20 1.5Mb 10ms DropTail $ns duplex-link $n5 $n21 1.5Mb 10ms DropTail $ns duplex-link $n5 $n22 1.5Mb 10ms DropTail
$ns duplex-link-op $n0 $n3 orient right-up $ns duplex-link-op $n1 $n3 orient right-down $ns duplex-link-op $n2 $n3 orient down $ns duplex-link-op $n10 $n3 orient up $ns duplex-link-op $n9 $n10 orient right-up $ns duplex-link-op $n10 $n11 orient right $ns duplex-link-op $n10 $n16 orient down $ns duplex-link-op $n10 $n17 orient right-down $ns duplex-link-op $n3 $n4 orient right
$ns duplex-link-op $n4 $n5 orient right-up $ns duplex-link-op $n4 $n11 orient down $ns duplex-link-op $n5 $n6 orient right $ns duplex-link-op $n6 $n7 orient right-up $ns duplex-link-op $n6 $n8 orient right $ns duplex-link-op $n11 $n12 orient right $ns duplex-link-op $n12 $n13 orient right-up $ns duplex-link-op $n12 $n14 orient right $ns duplex-link-op $n12 $n15 orient right-down $ns duplex-link-op $n11 $n18 orient right-down $ns duplex-link-op $n18 $n19 orient left-down $ns duplex-link-op $n18 $n20 orient right-down $ns duplex-link-op $n5 $n21 orient right-up $ns duplex-link-op $n5 $n22 orient left-up
set udp0 [new Agent/UDP] $ns attach-agent $n0 $udp0
set cbr0 [new Application/Traffic/CBR] $cbr0 attach-agent $udp0
set udp1 [new Agent/UDP] $ns attach-agent $n3 $udp1 $udp1 set class_ 1
set cbr1 [new Application/Traffic/CBR] $cbr1 attach-agent $udp1
set udp2 [new Agent/UDP] $ns attach-agent $n9 $udp2 $udp2 set class_ 2
set cbr2 [new Application/Traffic/CBR] $cbr2 attach-agent $udp2
set udp3 [new Agent/UDP] $ns attach-agent $n16 $udp3 $udp3 set class_ 3
set cbr3 [new Application/Traffic/CBR] $cbr3 attach-agent $udp3
set udp4 [new Agent/UDP] $ns attach-agent $n19 $udp4 $udp4 set class_ 4
set cbr4 [new Application/Traffic/CBR] $cbr4 attach-agent $udp4
set udp5 [new Agent/UDP] $ns attach-agent $n7 $udp5 $udp5 set class_ 5
set cbr5 [new Application/Traffic/CBR] $cbr5 attach-agent $udp5
set udp6 [new Agent/UDP] $ns attach-agent $n14 $udp6 $udp6 set class_ 6
set cbr6 [new Application/Traffic/CBR] $cbr6 attach-agent $udp6
set udp7 [new Agent/UDP] $ns attach-agent $n13 $udp7 $udp7 set class_ 7
set udp8 [new Agent/UDP] $ns attach-agent $n1 $udp8 $udp8 set class_ 8
set cbr8 [new Application/Traffic/CBR] $cbr8 attach-agent $udp8
set null0 [new Agent/Null] $ns attach-agent $n14 $null0
set null1 [new Agent/Null] $ns attach-agent $n13 $null1
set null2 [new Agent/Null] $ns attach-agent $n8 $null2
set null3 [new Agent/Null] $ns attach-agent $n20 $null3
set null4 [new Agent/Null] $ns attach-agent $n14 $null4
set null5 [new Agent/Null] $ns attach-agent $n20 $null5
set null6 [new Agent/Null] $ns attach-agent $n21 $null6
set null7 [new Agent/Null] $ns attach-agent $n22 $null7
set null8 [new Agent/Null] $ns attach-agent $n17 $null8
$ns connect $udp0 $null0 $ns connect $udp1 $null1 $ns connect $udp2 $null2 $ns connect $udp3 $null3 $ns connect $udp4 $null4 $ns connect $udp5 $null5 $ns connect $udp6 $null6 $ns connect $udp7 $null7 $ns connect $udp8 $null8
# creation trace traffic
set max_fragmented_size 1024
#add udp header(8 bytes) and IP header (20bytes) set packetSize 1052
set trace_file_name video1.dat
set original_file_id [open $original_file_name r] set trace_file_id [open $trace_file_name w] set pre_time 0
while {[eof $original_file_id] == 0} { gets $original_file_id current_line
scan $current_line "%d%s%d%d%f" no_ frametype_ length_ tmp1_ tmp2_ set time [expr int(($tmp2_ - $pre_time)*1000000.0)]
if { $frametype_ == "I" } {
puts $trace_file_id "$time $length_ $type_v $prio_p $max_fragmented_size" set pre_time $tmp2_
}
close $original_file_id close $trace_file_id set end_sim_time $tmp2_ puts "$end_sim_time"
set trace_file [new Tracefile]
$trace_file filename $trace_file_name
#Attach video to server #create source traffic
#Create a UDP agent and attach it to node n0 set udp_0 [new Agent/myUDP]
$udp_0 set_filename udpSend0 $udp_0 set packetSize_ 1052
$ns attach-agent $n2 $udp_0 ;#Server 2
set udp_3 [new Agent/myUDP] $udp_3 set_filename udpSend1 $udp_3 set packetSize_ 1052
set udp_6 [new Agent/myUDP] $udp_6 set_filename udpSend7 $udp_6 set packetSize_ 1052
$ns attach-agent $n2 $udp_6 ;#Server 2
set udp_9 [new Agent/myUDP] $udp_9 set_filename udpSend8 $udp_9 set packetSize_ 1052
$ns attach-agent $n2 $udp_9 ;#Server 2
set udp_1 [new Agent/myUDP] $udp_1 set_filename udpSend9 $udp_1 set packetSize_ 1052
$ns attach-agent $n20 $udp_1 ;#Server 20
set udp_4 [new Agent/myUDP] $udp_4 set_filename udpSend14 $udp_4 set packetSize_ 1052
$ns attach-agent $n20 $udp_4 ;#Server 20
set udp_7 [new Agent/myUDP] $udp_7 set_filename udpSend15 $udp_7 set packetSize_ 1052
$ns attach-agent $n20 $udp_7 ;#Server 20
set udp_2 [new Agent/myUDP] $udp_2 set_filename udpSend16 $udp_2 set packetSize_ 1052
$ns attach-agent $n22 $udp_2 ;#Server 22
set udp_5 [new Agent/myUDP] $udp_5 set_filename udpSend19 $udp_5 set packetSize_ 1052
$ns attach-agent $n22 $udp_5 ;#Server 22
set udp_8 [new Agent/myUDP] $udp_8 set_filename udpSend21 $udp_8 set packetSize_ 1052
$ns attach-agent $n22 $udp_8 ;#Server 22
# Attach video traffic source
set video0 [new Application/Traffic/myEvalvid] $video0 attach-tracefile $trace_file
$video0 attach-agent $udp_0
$video1 attach-agent $udp_1
set video2 [new Application/Traffic/myEvalvid] $video2 attach-tracefile $trace_file
$video2 attach-agent $udp_2
set video3 [new Application/Traffic/myEvalvid] $video3 attach-tracefile $trace_file
$video3 attach-agent $udp_3
set video4 [new Application/Traffic/myEvalvid] $video4 attach-tracefile $trace_file
$video4 attach-agent $udp_4
set video5 [new Application/Traffic/myEvalvid] $video5 attach-tracefile $trace_file
$video5 attach-agent $udp_5
set video6 [new Application/Traffic/myEvalvid] $video6 attach-tracefile $trace_file
$video6 attach-agent $udp_6
set video7 [new Application/Traffic/myEvalvid] $video7 attach-tracefile $trace_file
$video7 attach-agent $udp_7
set video8 [new Application/Traffic/myEvalvid] $video8 attach-tracefile $trace_file
$video8 attach-agent $udp_8
set video9 [new Application/Traffic/myEvalvid] $video9 attach-tracefile $trace_file
$video9 attach-agent $udp_9
# Create the Null agent to sink traffic set null_0 [new Agent/myEvalvid_Sink] $null_0 set_filename udpRec0
$ns attach-agent $n0 $null_0
set null_1 [new Agent/myEvalvid_Sink] $null_1 set_filename udpRec1
$ns attach-agent $n1 $null_1
set null_7 [new Agent/myEvalvid_Sink] $null_7 set_filename udpRec7
set null_8 [new Agent/myEvalvid_Sink] $null_8 set_filename udpRec8
$ns attach-agent $n8 $null_8
set null_9 [new Agent/myEvalvid_Sink] $null_9 set_filename udpRec9
$ns attach-agent $n9 $null_9
set null_14 [new Agent/myEvalvid_Sink] $null_14 set_filename udpRec14
$ns attach-agent $n14 $null_14
set null_15 [new Agent/myEvalvid_Sink] $null_15 set_filename udpRec15
$ns attach-agent $n19 $null_15
set null_16 [new Agent/myEvalvid_Sink] $null_16 set_filename udpRec16
$ns attach-agent $n19 $null_16
set null_19 [new Agent/myEvalvid_Sink] $null_19 set_filename udpRec19
$ns attach-agent $n19 $null_19
set null_21 [new Agent/myEvalvid_Sink] $null_21 set_filename udpRec21
$ns attach-agent $n21 $null_21
# Attach the 2 agents
$ns connect $udp_0 $null_0 $ns connect $udp_1 $null_1 $ns connect $udp_2 $null_7 $ns connect $udp_3 $null_8 $ns connect $udp_4 $null_9 $ns connect $udp_5 $null_14 $ns connect $udp_6 $null_15 $ns connect $udp_7 $null_16 $ns connect $udp_8 $null_19 $ns connect $udp_9 $null_21
$ns at 7.3 "$cbr8 start"
$ns at 4.0 "$cbr5 stop" $ns at 5.1 "$cbr6 stop" $ns at 5.8 "$cbr7 stop"
#Evaluated traffics $ns at 2.0 "$video0 start" $ns at 2.5 "$video1 start" $ns at 3.0 "$video2 start" $ns at 3.4 "$video3 start" $ns at 3.8 "$video4 start" $ns at 4.0 "$video5 start" $ns at 4.5 "$video6 start" $ns at 5.0 "$video7 start" $ns at 5.5 "$video8 start" $ns at 6.0 "$video9 start"
set tcp [new Agent/TCP] $tcp set class_ 2
set sink [new Agent/TCPSink] $ns attach-agent $n0 $tcp $ns attach-agent $n3 $sink $ns connect $tcp $sink
set ftp [new Application/FTP] $ftp attach-agent $tcp
$ns at 1.2 "$ftp start"
$ns at 1.35 "$ns detach-agent $n0 $tcp ; $ns detach-agent $n3 $sink"
puts [$cbr0 set packetSize_] puts [$cbr0 set interval_]
$ns at 500.0 "finish"
proc finish {} { global ns f nf $ns flush-trace close $f close $nf
puts "running nam..." exec nam out.nam & exit 0
}
LAMPIRAN
SCRIPT PROGRAM WEIGHTED ROUND ROBIN
set ns [new Simulator]
$ns color 0 pink $ns namtrace-all $nf
$ns duplex-link $n2 $n3 5Mb 2ms DropTail $ns duplex-link $n10 $n3 1.5Mb 10ms DropTail $ns duplex-link $n9 $n10 1.5Mb 10ms DropTail $ns duplex-link $n10 $n16 1.5Mb 10ms DropTail $ns duplex-link $n10 $n11 1.5Mb 10ms DropTail $ns duplex-link $n10 $n17 1.5Mb 10ms DropTail $ns duplex-link $n3 $n4 1.5Mb 10ms DropTail $ns duplex-link $n4 $n5 1.5Mb 10ms DropTail $ns duplex-link $n4 $n11 1.5Mb 10ms DropTail $ns duplex-link $n5 $n6 1.5Mb 10ms DropTail $ns duplex-link $n6 $n7 1.5Mb 10ms DropTail $ns duplex-link $n6 $n8 1.5Mb 10ms DropTail $ns duplex-link $n11 $n12 1.5Mb 10ms DropTail $ns duplex-link $n12 $n13 1.5Mb 10ms DropTail $ns duplex-link $n12 $n14 1.5Mb 10ms DropTail $ns duplex-link $n12 $n15 1.5Mb 10ms DropTail $ns duplex-link $n11 $n18 1.5Mb 10ms DropTail $ns duplex-link $n18 $n19 1.5Mb 10ms DropTail $ns duplex-link $n18 $n20 1.5Mb 10ms DropTail $ns duplex-link $n5 $n21 1.5Mb 10ms DropTail $ns duplex-link $n5 $n22 1.5Mb 10ms DropTail
$ns duplex-link-op $n0 $n3 orient right-up $ns duplex-link-op $n1 $n3 orient right-down $ns duplex-link-op $n2 $n3 orient down $ns duplex-link-op $n10 $n3 orient up $ns duplex-link-op $n9 $n10 orient right-up $ns duplex-link-op $n10 $n11 orient right $ns duplex-link-op $n10 $n16 orient down $ns duplex-link-op $n10 $n17 orient right-down $ns duplex-link-op $n3 $n4 orient right
$ns duplex-link-op $n4 $n5 orient right-up $ns duplex-link-op $n4 $n11 orient down $ns duplex-link-op $n5 $n6 orient right $ns duplex-link-op $n6 $n7 orient right-up $ns duplex-link-op $n6 $n8 orient right $ns duplex-link-op $n11 $n12 orient right $ns duplex-link-op $n12 $n13 orient right-up $ns duplex-link-op $n12 $n14 orient right $ns duplex-link-op $n12 $n15 orient right-down $ns duplex-link-op $n11 $n18 orient right-down $ns duplex-link-op $n18 $n19 orient left-down $ns duplex-link-op $n18 $n20 orient right-down $ns duplex-link-op $n5 $n21 orient right-up $ns duplex-link-op $n5 $n22 orient left-up
set udp0 [new Agent/UDP] $ns attach-agent $n0 $udp0
set cbr0 [new Application/Traffic/CBR] $cbr0 attach-agent $udp0
set udp1 [new Agent/UDP] $ns attach-agent $n3 $udp1 $udp1 set class_ 1
set cbr1 [new Application/Traffic/CBR] $cbr1 attach-agent $udp1
set udp2 [new Agent/UDP] $ns attach-agent $n9 $udp2 $udp2 set class_ 2
set cbr2 [new Application/Traffic/CBR] $cbr2 attach-agent $udp2
set udp3 [new Agent/UDP] $ns attach-agent $n16 $udp3 $udp3 set class_ 3
set cbr3 [new Application/Traffic/CBR] $cbr3 attach-agent $udp3
set udp4 [new Agent/UDP] $ns attach-agent $n19 $udp4 $udp4 set class_ 4
set cbr4 [new Application/Traffic/CBR] $cbr4 attach-agent $udp4
set udp5 [new Agent/UDP] $ns attach-agent $n7 $udp5 $udp5 set class_ 5
set cbr5 [new Application/Traffic/CBR] $cbr5 attach-agent $udp5
set udp6 [new Agent/UDP] $ns attach-agent $n14 $udp6 $udp6 set class_ 6
set cbr6 [new Application/Traffic/CBR] $cbr6 attach-agent $udp6
set udp7 [new Agent/UDP] $ns attach-agent $n13 $udp7 $udp7 set class_ 7
set cbr7 [new Application/Traffic/CBR] $cbr7 attach-agent $udp7
$ns attach-agent $n1 $udp8 $udp8 set class_ 8
set cbr8 [new Application/Traffic/CBR] $cbr8 attach-agent $udp8
set null0 [new Agent/Null] $ns attach-agent $n14 $null0
set null1 [new Agent/Null] $ns attach-agent $n13 $null1
set null2 [new Agent/Null] $ns attach-agent $n8 $null2
set null3 [new Agent/Null] $ns attach-agent $n20 $null3
set null4 [new Agent/Null] $ns attach-agent $n14 $null4
set null5 [new Agent/Null] $ns attach-agent $n20 $null5
set null6 [new Agent/Null] $ns attach-agent $n21 $null6
set null7 [new Agent/Null] $ns attach-agent $n22 $null7
set null8 [new Agent/Null] $ns attach-agent $n17 $null8
$ns connect $udp0 $null0 $ns connect $udp1 $null1 $ns connect $udp2 $null2 $ns connect $udp3 $null3 $ns connect $udp4 $null4 $ns connect $udp5 $null5 $ns connect $udp6 $null6 $ns connect $udp7 $null7 $ns connect $udp8 $null8
# creation trace traffic
set max_fragmented_size 1024
#add udp header(8 bytes) and IP header (20bytes) set packetSize 1052
set original_file_id [open $original_file_name r] set trace_file_id [open $trace_file_name w] set pre_time 0
while {[eof $original_file_id] == 0} { gets $original_file_id current_line
scan $current_line "%d%s%d%d%f" no_ frametype_ length_ tmp1_ tmp2_ set time [expr int(($tmp2_ - $pre_time)*1000000.0)]
if { $frametype_ == "I" } {
puts $trace_file_id "$time $length_ $type_v $prio_p $max_fragmented_size" set pre_time $tmp2_
}
close $original_file_id close $trace_file_id set end_sim_time $tmp2_ puts "$end_sim_time"
set trace_file [new Tracefile]
$trace_file filename $trace_file_name
#Attach video to server #create source traffic
#Create a UDP agent and attach it to node n0 set udp_0 [new Agent/myUDP]
$udp_0 set_filename udpSend0 $udp_0 set packetSize_ 1052
$ns attach-agent $n2 $udp_0 ;#Server 2
set udp_1 [new Agent/myUDP] $udp_1 set_filename udpSend1 $udp_1 set packetSize_ 1052
set udp_4 [new Agent/myUDP] $udp_4 set_filename udpSend7 $udp_4 set packetSize_ 1052
$ns attach-agent $n2 $udp_4 ;#Server 2
set udp_5 [new Agent/myUDP] $udp_5 set_filename udpSend8 $udp_5 set packetSize_ 1052
$ns attach-agent $n2 $udp_5 ;#Server 2
set udp_8 [new Agent/myUDP] $udp_8 set_filename udpSend9 $udp_8 set packetSize_ 1052
$ns attach-agent $n2 $udp_8 ;#Server 2
set udp_9 [new Agent/myUDP] $udp_9 set_filename udpSend14 $udp_9 set packetSize_ 1052
$ns attach-agent $n2 $udp_9 ;#Server 2
set udp_2 [new Agent/myUDP] $udp_2 set_filename udpSend15 $udp_2 set packetSize_ 1052
$ns attach-agent $n20 $udp_2 ;#Server 20
set udp_6 [new Agent/myUDP] $udp_6 set_filename udpSend16 $udp_6 set packetSize_ 1052
$ns attach-agent $n20 $udp_6 ;#Server 20
set udp_3 [new Agent/myUDP] $udp_3 set_filename udpSend19 $udp_3 set packetSize_ 1052
$ns attach-agent $n22 $udp_3 ;#Server 22
set udp_7 [new Agent/myUDP] $udp_7 set_filename udpSend21 $udp_7 set packetSize_ 1052
$ns attach-agent $n22 $udp_7 ;#Server 22
# Attach video traffic source
set video0 [new Application/Traffic/myEvalvid] $video0 attach-tracefile $trace_file
$video0 attach-agent $udp_0
set video1 [new Application/Traffic/myEvalvid] $video1 attach-tracefile $trace_file
set video2 [new Application/Traffic/myEvalvid] $video2 attach-tracefile $trace_file
$video2 attach-agent $udp_2
set video3 [new Application/Traffic/myEvalvid] $video3 attach-tracefile $trace_file
$video3 attach-agent $udp_3
set video4 [new Application/Traffic/myEvalvid] $video4 attach-tracefile $trace_file
$video4 attach-agent $udp_4
set video5 [new Application/Traffic/myEvalvid] $video5 attach-tracefile $trace_file
$video5 attach-agent $udp_5
set video6 [new Application/Traffic/myEvalvid] $video6 attach-tracefile $trace_file
$video6 attach-agent $udp_6
set video7 [new Application/Traffic/myEvalvid] $video7 attach-tracefile $trace_file
$video7 attach-agent $udp_7
set video8 [new Application/Traffic/myEvalvid] $video8 attach-tracefile $trace_file
$video8 attach-agent $udp_8
set video9 [new Application/Traffic/myEvalvid] $video9 attach-tracefile $trace_file
$video9 attach-agent $udp_9
# Create the Null agent to sink traffic set null_0 [new Agent/myEvalvid_Sink] $null_0 set_filename udpRec0
$ns attach-agent $n0 $null_0
set null_1 [new Agent/myEvalvid_Sink] $null_1 set_filename udpRec1
$ns attach-agent $n1 $null_1
set null_7 [new Agent/myEvalvid_Sink] $null_7 set_filename udpRec7
$ns attach-agent $n7 $null_7
$null_8 set_filename udpRec8 $ns attach-agent $n8 $null_8
set null_9 [new Agent/myEvalvid_Sink] $null_9 set_filename udpRec9
$ns attach-agent $n9 $null_9
set null_14 [new Agent/myEvalvid_Sink] $null_14 set_filename udpRec14
$ns attach-agent $n14 $null_14
set null_15 [new Agent/myEvalvid_Sink] $null_15 set_filename udpRec15
$ns attach-agent $n19 $null_15
set null_16 [new Agent/myEvalvid_Sink] $null_16 set_filename udpRec16
$ns attach-agent $n19 $null_16
set null_19 [new Agent/myEvalvid_Sink] $null_19 set_filename udpRec19
$ns attach-agent $n19 $null_19
set null_21 [new Agent/myEvalvid_Sink] $null_21 set_filename udpRec21
$ns attach-agent $n21 $null_21
# Attach the 2 agents
$ns connect $udp_0 $null_0 $ns connect $udp_1 $null_1 $ns connect $udp_2 $null_7 $ns connect $udp_3 $null_8 $ns connect $udp_4 $null_9 $ns connect $udp_5 $null_14 $ns connect $udp_6 $null_15 $ns connect $udp_7 $null_16 $ns connect $udp_8 $null_19 $ns connect $udp_9 $null_21
$ns at 4.0 "$cbr5 stop" $ns at 5.1 "$cbr6 stop" $ns at 5.8 "$cbr7 stop"
#Evaluated traffics $ns at 2.0 "$video0 start" $ns at 2.5 "$video1 start" $ns at 3.0 "$video2 start" $ns at 3.4 "$video3 start" $ns at 3.8 "$video4 start" $ns at 4.0 "$video5 start" $ns at 4.5 "$video6 start" $ns at 5.0 "$video7 start" $ns at 5.5 "$video8 start" $ns at 6.0 "$video9 start"
set tcp [new Agent/TCP] $tcp set class_ 2
set sink [new Agent/TCPSink] $ns attach-agent $n0 $tcp $ns attach-agent $n3 $sink $ns connect $tcp $sink
set ftp [new Application/FTP] $ftp attach-agent $tcp
$ns at 1.2 "$ftp start"
$ns at 1.35 "$ns detach-agent $n0 $tcp ; $ns detach-agent $n3 $sink"
puts [$cbr0 set packetSize_] puts [$cbr0 set interval_]
$ns at 20.0 "finish"
proc finish {} { global ns f nf $ns flush-trace close $f close $nf
puts "running nam..." exec nam out.nam & exit 0
}
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[13] Yanto, “Analisis QoS (Quality Of Service) pada Jaringan Internet”
[Online].
Tersedia:http://download.portalgaruda.org/articel.php?article=32511&val=
BAB 3
PERANCANGAN SIMULASI
3.1. Perancangan Alur Penelitian
Guna mencapai tujuan penelitian, perancangan alur penelitian dilakukan
sesuai alur pada Gambar 3.1.Perancangan terlebih dahulu melakukan instalasi dan
pengujian perangkat yang digunakan, yaitu network simulator NS-2.Kemudian
dibangunlah model jaringan CDN, pemilihan server, client dan background
traffic.
Untuk menguji penggunaan multimedia pada jaringan CDN, maka piranti
lunak evaluasi video Evalvid diintegrasikan ke NS-2 pada sistem operasi ubuntu.
Trafik dipilih berdasarkan kerangka Evalvid dengan mengubah kecepatan atau bit
rate video.
Penerapan model CDN dilakukan dengan Load Balancer dengan
menganalisis penerimaan data (download). Analisis dilakukan dengan menghitung
kinerja dari hasil simulasi dengan membandingkan jaringan tanpa CDN atau
single server dengan jaringan setelah dilakukan penerapan CDN.
3.2. Spesifikasi Perangkat Penelitian 3.2.1 Perangkat Keras
Perangkat keras yang digunakan untuk menjalankan simulasi pada Tugas
Akhir ini adalah satu buah laptop Hp Pavilion G4-1311AU dengan spesifikasi
sebagai berikut:
- Processor AMD Dual-Core A4-3305M
- Kecepatan Prosessor (1,9 GHz, 2MB L3 cache)
- Memory 4 GB DDR3
- HDD 500 GB
3.2.2 Perangkat Lunak
Spesifikasi perangkat lunak yang digunakan adalah:
- Sistem operasi Ubuntu 14.04 LTS.
- Network simulator NS-2.35
3.3. Spesifikasi Trafik Simulasi CDN
Tugas akhir ini dilakukan dengan menggunakan softwareNS-2 (Network
Simulator-2) yang merupakan perangkat lunak yang digunakan untuk
mensimulasikan jaringan berbasis TCP/IP dengan berbagai jenis medianya.
Adapun spesifikasi trafik video yang digunakan pada simulasi ditunjukkan pada
Tabel 3.1, dimana kecepatan video memiliki bit rate:286435,406 bps.
Tabel 3.1: Spesifikasi Trafik Video
Parameter Keterangan
Nama video
Kecepatan frame
Tipe frame
Codec
bit rate (bps)
akiyo_cif.yuv
30fps
IPP
MPEG4
286435 bps
Video memiliki kecepatan frame 30 frame setiap detik dengan codec mpeg4
berframe IPP.
3.4. Spesifikasi Fisik Simulasi CDN
Konfigurasi jaringan yang disimulasikan menirukan jaringan CDN seperti
ditunjukkan pada Gambar 3.2, dimana jaringan CDN yang dimodelkan dengan
jaringan CDN terdiri dari 3 server dan 19 client dimana dari 19 client
yangmelakukan permintaan layanan ada 10 client. Sementara 9 client lain
Gambar 3.4Network Configuration
3.5. Implementasi Sistem Load Balancer
Implementasi sistem Load Balancer pada jaringan CDN ditempatkan
diantara client dan server seperti yang ditunjukkan pada Gambar 3.3. Ketika ada
client yang ingin terhubung ke server maka Load Balancer akan memilih server
mana yang akan melayani client tersebut dengan salah satu dari tiga algoritma
yaitu Least Connection (LC), Round Robin (RR), dan Weighted Round Robin
(WRR).
Load Balancer dengan algoritma least connection menghubungkan client ke
server berdasarkan jumlah client paling sedikit yang terhubung ke server. Jadi
ketika ada client yang merequest situs maka Load Balancer akan mendeteksi Server1
server mana yang memiliki koneksi paling sedikit dan kemudian
menghubungkannya.
Gambar 3.3 Implementasi Load Balancer pada Jaringan CDN
Load Balancer dengan algoritma round robin menghubungkan client
dengan server berdasarkan waktu kedatangan dan urutan server yang ada. Ketika
client pertama melakukan request maka Load Balancer akan menghubungkan
client tersebut ke server1. Request dari client kedua Load Balancer akan
menghubungkannya ke server2. Reqest dari client ketiga Load Balancerakan
menghubngkannya ke server3. Request dari client keempat Load Balancer akan
menghubungkannya kembali ke server1. Begitu seterusnya setiap ada request dari
Load Balancer dengan algoritma weighted round robin menghubungkan
client dengan server berdasarkan waktu kedatangan dan urutan server yang ada
tetapi urutannya dibebankan ke salah satu server yang terbaik. Ketika client
pertama melakukan request maka Load Balancer akan menghubungkan client
tersebut ke server1. Request dari client kedua Load Balancer akan
menghubungkannya ke server1 juga. Reqest dari client ketiga Load Balancerakan
menghubngkannya ke server2. Request dari client keempat Load Balancer akan
menghubungkannya ke server3. Begitu seterusnya setiap ada request dari client.
3.6. Parameter Evaluasi 3.6.1. Delay
Delay adalah waktu tunda yang dibutuhkan packet data dari pengirim ke
penerima, Rumus mencari dekay ditunjukkan oleh Persamaan 1. [11]
����� =(����� ������������ −���������������� )
����� ℎ������ (1)
Delay juga dapat dipengaruhi oleh jarak, media fisik, kongesti atau juga
waktu proses yang lama. Menurut versi TIPHON (Telecommunications and
Internet Protocol HarmonizationOverNetworks), besarnya delay dapat
diklasifikasikan pada Tabel 3.2 [12].
Tabel 3.2One-Way Delay (Letency) versi TIPHON[12]
Kategori Delay (Letency) Besar Delay (Letency)
Sangat bagus < 150 ms
3.6.2. Packet Loss
Packet Loss merupakan suatu parameter yang menggambarkan suatu
kondisi yang menunjukkan jumlah paket, dapat terjadi karena collision dan
congestion pada jaringan.[11]
Rumus dari Packet Loss ditunjukkan pada Pers. 2 [11]
���������� =(��ℎ���������������� −��ℎ����������������� )
��ℎ���������������� �100%(2)
Menurut versi TIPHON (Telecommunications and Internet Protocol
HarmonizationOverNetworks), besarnya paketlossdapat diklasifikasikan pada
Tabel 3.2 [12].
Tabel 3.3 Paket Loss versi TIPHON[12]
Kategori Packet Loss
Packet Loss
Sangat Bagus 0%
Bagus 3%
Sedang 15%
Jelek 25%
3.6.3. Throughput
Throughput adalah kecepatan (rate) transfer data efektif, yang diukur
dalam bps. Throughput merupakan jumlah total kedatangan paket yang sukses
yang diamati pada tujuan selama interval waktu tertentu dibagi oleh durasi
interval waktu tersebut. Persamaan Throughput ditunjukkan pada Pers. 3. [13]
�ℎ����ℎ���= ��������� ��������
3.7. Langkah Pelaksanaan Simulasi
Urutan langkah pelaksanaan simulasi dapat dilihat pada Gambar 3.4.
Pada Gambar 3.4 dapat dilihat diagram alir pelaksanaan simulasi, dimana
langkah pertama yang dilakukan menginisilalisasi konfigurasi jaringan CDN,
setelah jaringan CDN dikonfigurasi maka jaringan diimplementasikan ke CDN
agar dapat disimulasikan.
Sebelum melakukan simulasikan CDN terlebih dahulu melakukan
pengaturan (setting) pada bit rate video, setelah itu akan melakukan proses
simulasi dengan salah satu algoritma. Kemudian simulasi diulang sampai 20 kali
percobaan, sesudah simulasi selesai dijalankan maka akan dihasilkan output
proses simulasi berformat .txt yang merekam semua kejadian selama simulasi
berlangsung.
Pada simulasi ini, Load Balancer menggunakan 3 algoritma, yaitu: Least
Connection, Round Robin, dan Weighted Round Robin. Setelah salah satu
algoritma dilakukan 20 kali percobaan, maka akan diulangi ke algoritma yang lain
BAB 4
HASIL SIMULASI DAN ANALISIS DATA
4.1 Umum
Bab ini menganalisis output yang dihasilkan dari 20 kali percobaan pada
simulasi di NS-2. Analisis data output tersebut diklasifikasikan untuk mengetahui
hasil penggunaan beberapa algoritma pada teknik Load Balancer. Parameter
kinerja yang diperoleh antara laindelay, packet loss, throughtput, dan jitter.
4.2 Hasil Pengujian
4.2.1 Pengujian Jaringan Tanpa CDN
Pada subbab ini, akan ditunjukkan hasil pengujian jaringan tanpa
CDN(Single Server), dimana hanya ada 1 server yang melayani permintaan
downling video oleh 10 client.
4.2.1.1 Delay
Data percobaan dari singleserver dapat kita lihat pada Tabel 4.1. Dari Tabel
4.1 dapat dilihat bahwa nilai rata-rata delay dari 20 kali percobaan untuk single
server paling besar di server2 yaitu sebesar 0.416722 detik dan yang paling kecil
di server1 yaitu sebesar 0.112162 detik. Sedangkan server3 memiliki delay
sebesar 0.281631 detik. Grafik perubahan setiap percobaan dapat dilihat pada
Gambar 4.1. Dari Gambar 4.1 dapat dilihat bahwa perubahan setiap percobaan
Tabel 4.1 Data Delay Tanpa CDN (Single Server)
Percobaan Delay (s)
Server1 Server2 Server3 1 0.1099322 0.3921887 0.2909992 2 0.1122998 0.4195775 0.3091178 3 0.1120770 0.4192706 0.3097415 4 0.1128405 0.4178899 0.3098287 5 0.1119700 0.4180505 0.3109928 6 0.1122763 0.4177114 0.3092474 7 0.1117363 0.4179326 0.3094052 8 0.1124550 0.4193903 0.3090790 9 0.1123683 0.4178714 0.3108748 10 0.1126332 0.4183929 0.3095861 11 0.1122535 0.4190800 0.3097842 12 0.1128767 0.4177008 0.3108304 13 0.1114728 0.4175245 0.3088737 14 0.1119828 0.4191586 0.3099724 15 0.1125740 0.4181406 0.3101293 16 0.1126670 0.4175157 0.3095538 17 0.1131148 0.4187423 0.3090414 18 0.1119567 0.4174677 0.3101206 19 0.1115251 0.4180761 0.3093305 20 0.1124168 0.4183835 0.3077867 Rata-Rata 0.1121714 0.4170033 0.3087148
Gambar 4.1 KarateristikDelay Single Server
Gambar 4.3 menunjukkan perbandingan nilai rata-rata 20 kali percobaan
dari sistem jaringan Single Server.
Gambar 4.2 Karateristik Rata-Rata Delay Single Server
4.2.1.2 Packet Loss
Untuk Grafik data packet loss untuk single server dapat dilihat pada
Tabel 4.2. Dari Tabel 4.2 dapat dilihat bahwa packet loss paling rendah terdapat
pada server1 yaitu sebesar 35.41% dan paling tinggi pada server2 yaitu sebesar
55.82%. Sedangkan untuk server3 packet loss sebesar 49.38%.
Tabel 4.2 Data Packet Loss Tanpa CDN (Single Server)
Percobaan Packet Loss
Server1 Server2 Server3
9 34.93% 55.82% 45.08%
Perubahan nilai rata-rata packet losssetiap percobaan tidak terlalu
signifikan, hanya pada percobaan ke-20 ketiga Single Server mengalami
peningkatan yang ditunjukkan Gambar 4.3 yang menunjukkan perubahan nilai
rata-rata tiap percobaan pada tiga Single Server.
Gambar 4.3 KarateristikPacket Loss Single Server
Untuk perbandingan nilai rata-rata packet loss 20 kali percobaan dapat
dilihat pada Gambar 4.4.
Gambar 4.4 Karateristik Rata-Rata Packet Loss Single Server
4.2.1.3 Throughput
Nilai throughput yang dihasilkan pada pengujian single server paling
tinggi pada server1 yaitu 189274.875 bps dan terendah pada server2 yaitu
130256.078 bps. Sedangkan server3 memiliki throughput sebesar 172152.600
bps.Nilai throughput ini berbanding terbalik dengan nilai packet loss.Karena nilai
throughput berpengaruh pada besarnya packet yang berhasil terkirim.Grafik
throughput dapat dilihat pada Tabel 4.3.
Tabel 4.3 Data Throughput Tanpa CDN (Single Server)
Percobaan Throughput (bps)
Server1 Server2 Server3 1 192719.400 134696.433 166113.593 2 190155.100 130402.567 160544.852 3 190188.333 130787.967 160500.852
0,00% 10,00% 20,00% 30,00% 40,00% 50,00% 60,00%
1 2 3
P
ac
ke
t L
os
s
4 190787.767 130511.167 513913.567 5 189199.900 130426.600 144157.467 6 189809.333 130537.600 160130.185 7 188265.400 130488.300 160337.667 8 190858.000 130280.433 160556.000 9 189921.000 130278.933 159639.963 10 190407.533 130655.800 144944.333 11 190066.333 130779.933 160351.037 12 190864.767 129995.000 144057.467 13 188967.367 130962.067 144448.167 14 189747.533 130586.333 144330.667 15 190521.700 130527.500 144276.100 16 189995.967 130703.100 144673.433 17 191257.467 130519.700 160200.815 18 189295.600 130345.200 144075.400 19 188625.333 130127.100 160809.593 20 173843.667 121509.833 164990.852 Rata-Rata 189274.875 130256.078 172152.600
Untuk melihat perubahan tiap perobaan dapat dilihat pada Gambar 4.5.Dari
Gambar 4.5 dapat dilihat bahwa pada Single Server1 dan Single Server3
perubahan nilai throughtput lebih stabil daripada Single Server2 yang nilainya
lebih bervariasi.
Gambar 4.5 KarateristikThroughput Single Server
Perbandingan nilai rata-rata 20 kali percobaan untuk parameter throughput
dapat dilihat pada Gambar 4.6.
Gambar 4.6 Karateristik Rata-Rata Throughput Single Server
4.2.2 Penerapan Jaringan CDN
Setelah dilakukan pengujian jaringan dengan single server dan jaringan
CDN, maka dilakukan analisis perbandingan antara hasil pengujian dengan single
server dan setelah pengimplementasian jaringan CDN yang sudah dirancang pada
BAB 3.
4.2.2.1 Delay
Data perbandingan nilai rata-rata delay single server dan jaringan CDN dari
20 kali percobaan dapat dilihat pada Tabel 4.4. Gambar 4.7 menunjukkan
perubahan pada setiap percobaan single server dan jaringan CDN. Dimana delay
rata-rata yang ditampilkan adalah nilai rata-rata dari ketiga single server. Dari
tabel dan grafik dapat dilihat bahwa besar delay dari single server lebih besar
dibandingkan dengan setelah penerapan CDN. Karena dengan menggunakan 0
50000 100000 150000 200000
Server1 Server2 Server3
T
hr
o
g
hp
ut
(bps
)
jaringan CDN maka kerja single server akan terbagi dan tidak hanya diberatkan
ke satu server saja.
Tabel 4.4 PerbandinganDelay Single Server dan Jaringan CDN
Percobaan Delay (s)
Single Server LC RR WRR
1 0.2643734 0.0746518 0.1308019 0.0867261 2 0.2803317 0.0753887 0.1332597 0.0873026 3 0.2803630 0.0754475 0.1329682 0.0873266 4 0.2801863 0.0754226 0.1324716 0.0875090 5 0.2803377 0.0754603 0.1312684 0.0874620 6 0.2797450 0.0755161 0.1343835 0.0873571 7 0.2796914 0.0754689 0.1344546 0.0875764 8 0.2803081 0.0753665 0.1341323 0.0872529 9 0.2803715 0.0753349 0.1322128 0.0875321 10 0.2802040 0.0753718 0.1333128 0.0878038 11 0.2803726 0.0753445 0.1313691 0.0875302 12 0.2804693 0.0753225 0.1258215 0.0876810 13 0.2792903 0.0749631 0.1352767 0.0873321 14 0.2803713 0.0753554 0.1358861 0.0871902 15 0.2802813 0.0753685 0.1338490 0.0872989 16 0.2799121 0.0753075 0.1332214 0.0874576 17 0.2802995 0.0754791 0.1324805 0.0873271 18 0.2798484 0.0753961 0.1326009 0.0875185 19 0.2796439 0.0754741 0.1346084 0.0876176 20 0.2795290 0.0760313 0.1473450 0.0882532 Rata-Rata 0.2792965 0.0753736 0.1335862 0.0874527
Gambar 4.7 menunjukkan delay pada setiap percobaan ketiga algoritma
Load Balancer lebih baik dibandingkan dengan rata-rata ketiga single server.
Rata-rata nilai total delay pada jaringan CDN dan single server ditunjukkan pada
Gambar 4.8.
Gambar 4.8 PerbandinganDelaySingle Server dan Jaringan CDN
Menurut standard TIPHON (Telecommunicationsand Internet Protocol
HarmonizationOverNetworks), maka delay pada ketiga algoritma CDN masuk ke
kategori sangat bagus (<150 ms), dan nilai delaysingle server masuk ke kategori
bagus (150 s/d 300 ms).
4.2.2.2 Packet Loss
Perbandingan hasil simulasi dari single server dan jaringan CDN untuk
parameter packet loss dapat dilihat pada Tabel 4.5.Dari Tabel 4.5 dapat dilihat
bahwa kinerja jaringan CDN untuk parameter packet loss jauh lebih baik daripada
single server.Hal ini juga disebabkan kinerja tunggal single server terlalu berat
untuk melayani permintaan downling video dari 10 client secara bersama-sama.
Dengan jaringan CDN kinerja akan lebih baik karena tugas server utama akan 0,00
0,05 0,10 0,15 0,20 0,25 0,30
D
ela
y
(s
)
Single Server Jaringan CDN
Single Server
lebih ringan dengan membagi tugas dengan server bayangan pada jaringan CDN
yang telah dibangun.
Tabel 4.5 PerbandinganPacket Loss Single Server dan Jaringan CDN
Percobaan Packet Loss
Single Server LC RR WRR
1 42.72% 2.25% 12.54% 14.68% 2 43.95% 2.48% 13.53% 13.72% 3 43.89% 2.52% 13.26% 13.50% 4 43.88% 2.42% 13.26% 13.62% 5 43.79% 2.40% 13.40% 13.70% 6 43.92% 2.58% 13.51% 13.78% 7 43.95% 2.30% 13.58% 14.07% 8 43.76% 2.50% 13.52% 13.85% 9 45.28% 2.56% 13.58% 13.81% 10 43.95% 2.48% 13.26% 13.79% 11 43.82% 2.54% 12.98% 13.68% 12 43.93% 2.49% 12.51% 13.53% 13 43.95% 2.51% 13.71% 13.72% 14 43.85% 2.40% 13.55% 13.91% 15 43.92% 2.31% 13.31% 13.84% 16 43.84% 2.45% 13.55% 13.52% 17 43.79% 2.49% 13.42% 13.76% 18 44.01% 2.32% 13.28% 13.49% 19 44.10% 2.56% 13.49% 13.70% 20 49.56% 10.25% 20.16% 20.14% Rata-Rata 44.19% 2.84% 13.67% 14.09%
Untuk melihat pergerakan perubahan packet loss pada seetiap percobaan
dapat dilihat pada Gambar 4.9 yang menunjukkan bahwa perubahan pada single
server dan ketiga algoritma Load Balancer stabil.Tetapi Grafik menunjukkan
bahwa besarnya nilai packet loss dari Single Server jauh lebih besar daripada
Gambar 4.9 KarateristikPacket Loss Single Server dan Jaringan CDN
Gambar 4.10 PerbandinganPacket Loss Single Server dan jaringan CDN
Menurut standard TIPHON (Telecommunicationsand Internet Protocol
HarmonizationOverNetworks) besar nilai rata-rata dari 20 kali percobaan single
server masuk dalam kategori jelek/buruk (>25%). Sedangkan jaringan CDN untuk
algoritma Least Connection (LC) masuk dalam kategori bagus (<3%) dan untuk
dua algoritma lainnya Round Robin (RR) dan Weighted Round Robin (WRR)
4.2.2.3 Throughput
Nilai perbandingan throughput dari 20 kali percobaanSingle Server dan
jaringan CDN ditunjukkan pada Tabel 4.6.
Tabel 4.6 PerbandinganThroughput Single Server dan Jaringan CDN
Percobaan Throughput (bps)
Single Server LC RR WRR
1 164509.809 281036.167 253021.033 250925.400 2 160367.506 280361.367 250547.000 249443.600
3 160492.384 271078.000 251187.967 250129.100
4 146886.398 280532.133 250932.733 249870.900 5 154594.656 280970.400 250541.667 249427.400
6 160159.040 280150.767 250467.633 249657.033 7 159697.122 280792.267 246542.533 248756.800
8 160564.811 280110.833 247307.500 249474.933
9 159946.632 280046.567 249940.867 249601.067 10 155335.889 280215.300 251406.200 249725.900
11 160399.101 280173.833 251726.000 250564.500 12 154972.411 280384.867 253235.000 250367.867
13 154792.533 280321.900 249307.967 249985.167
14 154888.178 280545.567 250235.600 249315.800 15 155108.433 280665.633 250680.200 249042.700 16 155124.167 254785.739 250275.067 249894.300 17 160659.327 280420.433 250594.967 249595.567 18 154572.067 280672.000 251065.167 250291.967 19 159854.009 279955.400 250593.567 249471.467 20 153448.117 258499.800 231759.100 230527.033 Rata-Rata 157318.629 277585.949 249568.388 248803.425
Dari Tabel 4.6 dapat dilihat bahwa dengan menggunakan jaringan CDN
maka nilai throughput akan semakin tinggi dan dengan demikian besarnya packet
rata-rata throughput setelah 20 kali percobaan diatas 200000 bps, dibandingakan
dengan single server yang memiliki nilai throughput lebih kecil dari 200000 bps.
Gambar 4.11 menunjukkan perubahan nilai throughput dalam 20 kali
percobaan.Dapat dilihat bahwa nilai throughput 20 kali percobaan pada single
server dibawah jaringan CDN.
Gambar 4.11Karateristik Perbandingan ThroughputSetiap Percobaan
Gambar 4.12 menunjukkan perbandingan throughput antara single server
dan jaringan CDN.
Nilaithroughput jaringan CDN lebih tinggi daripada jaringan Single Server.
Ini berarti dengan jaringan CDN maka kemampuan jaringan akan lebih meningkat
dalam mentransmisikan bit-bit video.
Dari simulasi yang sudah dilakukan, nilai delay, packet loss, dan throughput
dari algoritma least connection lebih baik daripada algorima round robin dan
BAB 5
KESIMPULAN DAN SARAN
5.1.Kesimpulan
Berdasarkan simulasi dan analisa data, adapun beberapa kesimpulan pada
Tugas Akhir ini adalah sebagai berikut:
1. Dari hasil simulasi single server dan jaringan CDN, penggunaan jaringan
CDN akan meningkatkan QoS dari jaringan internet, ini dibuktikan dengan
nilai parameter delay, packet loss, dan throughtput yang semakin membaik
dengan menggunakan algoritma jaringan CDN.
2. Nilai rata-rata 20 kali percobaan delay pada single server yaitu0.279 detik.
Setelah penerapan jaringan CDN dengan Load Balancer ketiga algoritma
maka delay yang diperoleh lebih baik. Dengan algoritma LC diperoleh delay
0,075 detik atau turun 0.204 detik. Dengan algoritma RR diperoleh delay
0,134 detik atau turun 0,145 detik. Dengan algoritma WRR diperoleh delay
0,087 detik atau turun 0,192 detik.
3. Nilai rata-rata 20 kali percobaan packet loss pada single server yaitu44,19%.
Setelah penerapan CDN dengan Load Balancer ketiga algoritma diperoleh
packet loss yang lebih baik. Dengan algoritma LC diperoleh packet
loss2.82% atau turun 41,35%. Dengan algoritma RR diperoleh packet
loss13.95% atau turun 30,52%. Dan dengan algoritma WRR diperoleh packet
loss14,09% atau turun 30,1%.
4. Nilai rata-rata 20 kali percobaan throughput pada single server yaitu157319
maka delay yang diperoleh lebih baik. Dengan algoritma LC diperoleh
throughput 277586 bps atau naik 43,33%. Dengan algoritma RR diperoleh
throughput 249568 bps atau naik 36,96%. Dan dengan algoritma WRR
diperoleh throughput248803 bps atau naik 36,77%.
5. Dari ketiga algoritma Load Balancer least connection, round robin (RR), dan
weighted round robin (WRR) yang memiliki nilai rata-rata dari parameter
yang lebih baik adalah algoritma least connection.
5.2. Saran
Adapun saran untuk tugas akhir ini adalah:
1. Untuk tugas akhir selanjutnya dapat dilakukan dengan penambahan jumlah
client dan server.
2. Untuk tugas akhir selanjutnya dapat dilakukan penerapan Load Balancer
BAB 2
TINJAUAN PUSTAKA
2.1. Content Delivery Network (CDN)
CDN adalah sebuah sistem jaringan server untuk mendistribusikan konten
yang ada dalam sebuah aplikasi/web ke berbagai pengakses/pengguna di berbagai
belahan dunia agar data/konten yang dikirim dan diterima lebih cepat. CDN
diperuntukkan untuk website atau aplikasi yang pengaksesnya dari berbagai
belahan dunia. [1]
Server jaringan CDN terdistribusi secara global dengan tujuan untuk
melayani konten ke pengguna dengan ketersediaan yang besar dan performa
tinggi. CDN melayani sebagian besar konten di internet saat ini, termasuk objek
web (teks, grafis dan script), obyek download (file media, software), aplikasi
(e-commerce, portal), media live streaming, on-demand streaming media, dan
jaringan sosial. [2]
Konsep CDN adalah dengan meletakkan beberapa server pada belahan
dunia, sehingga server utama (asli) tidak akan langsung melayani permintaan web
request secara langsung melainkan melalui server-server pada jaringan CDN.
Keuntungannya, server asli tidak akan mengalami drop akibat banyaknya
permintaan dari pengguna internet, dan efisiensi terhadap delay dan packet loss
![Tabel 3.3 Paket Loss versi TIPHON[12]](https://thumb-ap.123doks.com/thumbv2/123dok/872179.594296/47.595.214.413.424.530/tabel-paket-loss-versi-tiphon.webp)
