2002 - cesnet

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20.6 Further Work on the ProjectThe project work was already initiated by the end of 2001. Unfortunately, wedid not receive the temperature compensated oscillators and the custom carduntil the second half of 2002. The NTP server has been operating in a closedtesting mode since September 2002, when we completed the first version of theFK microcomputer. Since that time, we have been continuously monitoring theoperation of the entire server and storing the data obtained for a long-term systembehaviour analysis. At the beginning of 2003, we plan to put the server intoroutine operation and we want to focus on the evaluation of its characteristicsfrom the metrological point of view.204 High-speed National Research Network and its New Applications 2002
21 Platforms for Streaming andVideo Content CollaborationOur group worked as a part of the strategic project entitled Multimedia Transmissionsin the CESNET2 Network in the first half-year. In the second half-year,our group separated and formed a standalone project. Our research objectivesremained unchanged throughout the year.21.1 Streaming ServerOur main task was to establish a streaming platform for a higher-quality video(PAL format). In the beginning, we considered purchasing a special MPEG-2streaming device (for example from vBrick or Optibase). However, such a stepwas assessed as inefficient. New versions of streaming systems that are alreadyrun by the association (Real Video 9 and Windows Media 9) allow PAL-qualitystreaming. That is why we rejected the special and proprietary hardware andconcentrated on the development of the existing platform of the association.During the year, we performed three broadcasts in PAL quality on our platform.The first one was the broadcast of the 10 Years of the Internet in the Czech Republicevent that was tainted by insufficient performance on the side of clients.The other two broadcasts (INVEX2002 and TERENA Mini Symposium) weredone with maximum satisfaction; hence, we can say that the CESNET’s streamingplatform is ready for PAL quality streaming.We have added an external disk array to the CESNET’s streaming platform toincrease its content capacity. The capacity of the disk array is approximately1.5 TB, which allows storage of about 1,500 hours of records in standard quality.This disk array utilizes inexpensive discs (ATA 133) with the u160 SCSI output inthe RAID5 setup. The performed tests showed that the read and write speed ofour setup is sufficient (read approx. 540 Mbps, write approx. 330 Mbps).Because large amounts of the multimedia material suitable for streaming (foreducational purposes, for example) started to emerge in CESNET and premisesof its members (as an example, the University of Veterinary and PharmaceuticalSciences in Brno), the manual content adding ceased to be satisfactory.We had to create a content adding system. Its primary parameter was the onlineconnection with the streaming server (no replication, data stored only at onelocation), linkage with CAAS (no user accounts outside CAAS) and preservationof flexibility during upgrades of the streaming server (running under Windows2000).High-speed National Research Network and its New Applications 2002205
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2002High-speed NationalResearch Net
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Table of Contents1 Introduction 92
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6.4.3 Support of Special Events. .
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14.3 Cisco ICM Software . . . . . .
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1 IntroductionThe report presented
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2 Brief SummaryThe research plan ti
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men. We designed the basic concept
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2.4 Other ProjectsThe objective of
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3 Operation of CESNET2During 2002,
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Canarie622 MbpsESNET622 MbpsGÉANT/
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central network core routers with t
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The existing logical topology of mu
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The logical core topology anticipat
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Within the informative part, we req
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3.6 Statistical Traffic Analysis3.6
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Figure 3.8: Influence of time step
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Praha-Plzeň, 2.5 GbpsPraha-Ústí
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CESNET2-GÉANT, 1.2 Gbps (october)C
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Part IStrategic Projects
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4 Optical Networks and theirDevelop
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US (TeraGrid with backbone 4 × 10
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ApplicationMiddlewareHigh bandwidth
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4.2.2 User InterfaceSubscribers (me
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ers will move and that other types
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GermanyCheb10 G34 MPlzeňGÉANT 622
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It is also possible to implement th
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Chemical Technology and PASNET, we
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Manufacturerwww.accton.comwww.actio
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particularly based on the fact that
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0101 NRZlaserMach-ZendermodulatorED
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Cisco ONS 15201boosterfiber 130 kmC
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5 IP version 6Further expansion of
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5.2.1 IPv6 Network TopologyFor the
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Missing in this list are especially
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5.2.7 Connecting End Site NetworksI
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5.4 IPv6 User Services and Applicat
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sible reprogramming of functions, a
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IPBIpb_0HFEHfe_1SORSor_0LUPLup_0RQR
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As regards our router on the PC pla
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the activities of our project. In 2
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6 Multimedia Transmissions6.1 Objec
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scaling is considerably restricted;
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Figure 6.1: Modified program for sh
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6.3.5 Direct Support for Pilot Grou
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programs which control the integrat
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Figure 6.4: Example of broadcast fr
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Figure 6.5: Set of tuners and serve
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and transfer the solution to an ope
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The actual computing capacity of Me
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7.1.2 Information ServicesMetaCentr
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Figure 7.1: Grid nodes for SC2002an
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(December 2002). This was one of th
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the use of 158 processors). When we
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8 Voice Services in CESNET2The proj
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Figure 8.1: Number of phone calls i
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VoGWs of members involved in the pr
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connection and compare the features
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• Extensive possibilities for the
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H.323 WorldSIP PhoneMS Messengerand
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ation with students at the Strahov
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9 Quality of Service in HighspeedNe
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In addition, Juniper routers make u
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We tried to divide the capacity of
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low with respect to the capacity of
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Figure 9.10: Loss rate on Prague-Po
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sendingapplicationTCP senderseqackp
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Figure 9.13: Example of a course of
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Part IIInternational Projects
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10 GÉANTSince 1996, CESNET has bee
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Figure 10.2: Utilization of individ
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11 DataGridSince 2001, our research
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Therefore, we organized a meeting w
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12 SCAMPISCAMPI (Scaleable Monitori
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12.3.1 WP0 - Requirement AnalysisTh
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1 6 12 18 24 30requirements analysi
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Part IIIOther Projects
Page 153 and 154: 13 Online Education Infrastructurea
Page 155 and 156: 13.1.2 Construction of a Teleinform
Page 157 and 158: with high-capacity disk memories co
Page 159 and 160: If the collaboration of individual
Page 161 and 162: ten, whereas items in the hyperlink
Page 163 and 164: Besides that, we processed some lec
Page 165 and 166: CallManager was designed using open
Page 167 and 168: tre, when we were forced to handle
Page 169 and 170: 15 Intelligent NetFlow AnalyserThe
Page 171 and 172: In the second half-year, we complet
Page 173 and 174: 15.4 ConclusionDuring 2002, our tea
Page 175 and 176: • data space consolidation (easy
Page 177 and 178: ecord size [kB] 256 512 1024 2048 4
Page 179 and 180: Figure 16.3: Nishan-Linux measureme
Page 181 and 182: 16.3.1 No SecurityThe initiator is
Page 183 and 184: vices. These features mainly involv
Page 185 and 186: Figure 17.1: www.cesnet.cz• We ha
Page 187 and 188: The meeting was broadcast live via
Page 189 and 190: Most of the problems connected with
Page 191 and 192: Standard manipulator (privileged us
Page 193 and 194: 19 Security of Local CESNET2Network
Page 195 and 196: Moreover, the program was complemen
Page 197 and 198: in the network of AV ČR Praha-Krč
Page 199 and 200: 19.5 Future Plans, Expected Further
Page 201 and 202: InternetNTPEthernetKPCPPSLabelPPSLa
Page 203: generated by the NTP server. Its ou
Page 207 and 208: streaming serverAAA (LDAPS) server1
Page 209 and 210: 21.5 Video Content CollaborationPla
Page 211 and 212: First of all, we had to define an a
Page 213 and 214: international-scale broadcast will
Page 215 and 216: Part IVConclusion and Annexes
Page 217 and 218: 23 ConclusionThe current developmen
Page 219 and 220: AList of connected institutionsA.1
Page 221 and 222: institutionconnection [Mbps]Institu
Page 223 and 224: Karásek Miroslav, Ing., DrSc. Czec
Page 225 and 226: Voral Pavel, Ing.Voříšek Martin,
Page 227 and 228: Burčík J.: Optické přepínání
Page 229 and 230: Veselá S.: Aktivity sdružení CES
Page 231 and 232: Krsek M.: Platformy pro streaming m
Page 233 and 234: Zatloukal K., Křivánek V.: Videok
Page 235 and 236: Satrapa P.: Scavenger: Za Internet
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