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中央大學對外連線狀況

Nov 2007

2 Susan Yang, Computer Center, National Central University

中央大學對外連線

目的建設足夠的網路頻寬提升中央大學連接國內 / 國外網路效能

•能與國內學術網路快速連線•能與國內商業網路快速連線•能與國外學術團體快速連線•能與國外商業網路快速連線

– 包括 IEEE 論文查詢 , 論文資料庫連線

3 Susan Yang, Computer Center, National Central University

中央大學對外連線 (cont.)目前對外連線概況

TANET 連線•連接國內大專院校 , 高中職 , 國中小學 .•連接國外線路 (2.5 G bps, 呈嚴重壅塞 )

TWAREN 連線•連接國內大專院校 , 研究單位•共用國外 Ineternet 2 連線 ( 學術單位 )

台聯大互連與國外線路•中央 , 交通 , 清華 , 陽明 4 校互連網路•國外專線 (1.6G bps, 提供良好研究資料下載與交流 )

Hinet 互連•快速連接國內商業網路

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中央大學對外連線 (cont.)

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中央大學對外連線 (cont.)

國外連線延遲中央大學 ~ 台聯大出國

•O(104 ) mini-seconds桃園區網 ~ TANET 出國共用線路

•O(106 ) mini-seconds

NCU Campus - 台聯大 出國專線 1001[Tue] {www.3com.com=11942, www.cisco.com=844, www.ubuntu.com=1135}1002[Tue] {www.3com.com=12320, www.cisco.com=901, www.ubuntu.com=1153}

TYC Campus - 桃園區網 - TANET 出國專線 1001[Mon] {www.3com.com=1850397, www.cisco.com=1569, www.ubuntu.com=1731}1002[Tue] {www.3com.com=2481171, www.cisco.com=1555, www.ubuntu.com=2347}

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桃園區網路技術研討會台聯大出國線路效能評估

中央大學電算中心 楊素秋

2007 年 11 月 23 日

8 Susan Yang, Computer Center, National Central University

報告大綱

1. 研究動機2. 主要連外 Trunk 流量的變化3. 國外網站檔案擷取延遲的變化4. 子程式功能 5. 結語

9 Susan Yang, Computer Center, National Central University

1. 研究動機

台聯大出國線路Cost

• 2 million per yearPerformance

• Trunk Traffic Statistics (MRTG 圖 )• Ping (RTT 値 )

– 部分 firewall 不允許 ping traffic• User Sensitive Traffic Statistics

– Delay for fetching png or pdf file» Cisco, hp, 3com, ubuntu*

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2. 主要連外 Trunk 流量

校園 core router7609 接台聯大出國線路流量http://cygnus.cc.ncu.edu.tw/mrtg/7609/r7609_63

.html

中央大學到桃園區網流量http://cygnus.cc.ncu.edu.tw/mrtg/m160/m160_6

5.html桃園區網到 TANET 骨幹流量

http://mrtg.moe.edu.tw/backbone/ncu_cht.html

11 Susan Yang, Computer Center, National Central University

校園 core router 接台聯大線路流量

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中央大學到桃園區網流量

13 Susan Yang, Computer Center, National Central University

桃園區網到 TANET 骨幹流量

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2. 主要連外 Trunk 流量 (cont.)

TANET 出國流量變化http://mrtg.moe.edu.tw/internet/interne

t-pos-stm16.html台聯大出國流量變化 http://mrtg.ntcu.

net/ntcu-6509/211.76.255.1_po8_1.html

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TANET 出國流量變化

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台聯大出國流量變化

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3. 國外網站檔案擷取延遲

效能比較網頁 : http://bunny.tyc.edu.tw/Ncu/browse.jsp

•NCU_Llink Collector– 140.115.11.131

•TYC_Link – 163.25.254.7

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3. 國外網站檔案擷取延遲 (cont.)

2007-Aug & 2007-Sep8/17~8/31, 9/1~9/30

2007-Oct10/3 (NCTU_DORM 斷線 )10/9 (NCTU_DORM 復線 )10/15 (TWGATE 修正 routing path)10/16 ~ 10/31

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4. 子程式功能

delay2.javaget() main()

wget_stat.shcrontabCall delay2 routinely

25 Susan Yang, Computer Center, National Central University

public void get(String theUrl, String filename) throws IOException { theUrl_name = theUrl; try { URL gotoUrl = new URL(theUrl); InputStreamReader isr = new InputStreamReader(gotoUrl.openStream()); BufferedReader in = new BufferedReader(isr); StringBuffer sb = new StringBuffer(); String inputLine; boolean isFirst = true; //grab the contents at the URL while ((inputLine = in.readLine()) != null){ sb.append(inputLine+"\r\n"); } //write it locally createAFile(filename, sb.toString()); } catch (MalformedURLException mue) { mue.printStackTrace(); } catch (IOException ioe) { throw ioe; } }

26 Susan Yang, Computer Center, National Central University

public static void main(String[] args) { Date date=new Date(); SimpleDateFormat day=new SimpleDateFormat("MMdd"); SimpleDateFormat df=new SimpleDateFormat("MMddHH"); // System.out.println(df.format(date)); String day_file=day.format(date); String cur_hour=df.format(date); String filename = "/home/Ncu_Link/" + day_file; try { BufferedWriter out = new BufferedWriter(new FileWriter(filename, true)); out.write("\n Hour " + cur_hour); long elapsedtime = System.currentTimeMillis(); out.write("\n From " + elapsedtime + " msec. || "); delay2 httpGetter = new delay2(); httpGetter.get(args[0], args[1]); out.write("\n To " + elapsedtime + " msec. || "); elapsedtime = System.currentTimeMillis() - elapsedtime; out.write("\n It takes " + elapsedtime + " msec." + theUrl_name + "\n"); out.close(); } catch (Exception ex) { ex.printStackTrace(); } }}

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#!/bin/csh -fsetenv CLASSPATH '.'set batch_home=/opt/apache-tomcat-6.0.14/webapps/ROOT/Socketset flist=`/bin/ls $batch_home/lib/*.jar`foreach name ($flist) setenv CLASSPATH ${CLASSPATH}:${name}endcd $batch_homejava delay2 http://www.cisco.com/cdc_content_elements/images/homepage/ba_partnerLocato_blue.jpg cisco.jpgjava delay2 http://welcome.hp-ww.com/country/us/en/img/n4_welcome/smb/primary_smb_msg_730.jpg hp.jpgjava delay2 http://www.3com.com/other/pdfs/solutions/en_US/3com_505403-001.pdf 3com.pdfjava delay2 http://www.ubuntu.com/themes/ubuntu07/images/ubuntulogo.png ubuntu.png

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Date 111900 It takes 922 msec.http://www.cisco.com/cdc_content_elements/images/homepage/ba_partnerLocato_blue.jpg

Date 111900 It takes 1797 msec.http://welcome.hp-ww.com/country/us/en/img/n4_welcome/smb/primary_smb_msg_730.jpg

Date 111900 It takes 19266 msec.http://www.3com.com/other/pdfs/solutions/en_US/3com_505403-001.pdf

Date 111900 It takes 1140 msec.http://www.ubuntu.com/themes/ubuntu07/images/ubuntulogo.png

Date 111904 It takes 1079 msec.http://www.cisco.com/cdc_content_elements/images/homepage/ba_partnerLocato_blue.jpg

Date 111904 It takes 859 msec.http://welcome.hp-ww.com/country/us/en/img/n4_welcome/smb/primary_smb_msg_730.jpg

Date 111904 It takes 12203 msec.http://www.3com.com/other/pdfs/solutions/en_US/3com_505403-001.pdf

Date 111904 It takes 1078 msec.http://www.ubuntu.com/themes/ubuntu07/images/ubuntulogo.png

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4. 子程式功能 (cont.)

LinkPerf.javaExtract the data recorded per 4 hours per

iodAggregate the mean delay (msec)Output to another file

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1101[Thu] {welcome.hp-ww.com=774, www.3com.com=13443, www.cisco.com=800, www.ubuntu.com=1115}<br>

1102[Fri] {welcome.hp-ww.com=847, www.3com.com=12825, www.cisco.com=815, www.ubuntu.com=1025}<br>

1103[Sat] {welcome.hp-ww.com=1074, www.3com.com=13578, www.cisco.com=853, www.ubuntu.com=1225}<br>

1104[Sun] {welcome.hp-ww.com=672, www.3com.com=15053, www.cisco.com=821, www.ubuntu.com=1071}<br>

1105[Mon] {welcome.hp-ww.com=824, www.3com.com=13240, www.cisco.com=837, www.ubuntu.com=1065}<br>

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4. 子程式功能 (cont.)

Browse.jspOffer user to monitoring the aggregate d

ata recordsTimes_01.jsp

Draw the time-series graph according to the aggregate data records

Call jfreechart libraries•jfreechart-1.0.6

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5. 結語

Tyc_Link/Ncu_Link 國外連線效能分析 使用 JAVA /JSP 語言

(1) 進度緩慢 , 卻能初體驗 JAVA• population & resources 的強大 .

(2) 雖然 JAVA,JSP 都 K 過 , 但沒有太多概念 .• ㄧ步ㄧ步驗證使用 Socket, File, regex(

pattern, match, scanner)• 實做小小的功能 , 很有趣 .

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5. 結語 (cont.)

使用 Jfreechart Time seriese chartBar chartPie chart

能動態地 , 圖型化地呈現量測數據

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Thank You!