TechnicalAidsforMirroringSitesandChinaPopularScience

1、Technical Aids for Mirroring Sites and China Popular Science Exhibition(CPSE)Chen HuiCNIC ,CAS(Computer Network Information Center , Chinese Academy of Sciences)1Mirroring sitesCurrent status of mirror sites of CPSERsync, the tool for mirroring sitesHow to set up mirror siteApplication of new techno

2、logy to CPSEFlashStreaming video/audioVRMLJSPWeb site log files analysis2Mirroring sitesCurrent status of mirror sites of CPSERsync, the tool for mirroring sitesHow to set up the mirror site of China Popular Science Exhibition(CPSE)3Current status of mirror sites of CPSEObjectiveconvenient and fast

3、access to CPSEhave more people learn science knowledgeMirror SitesTaiwan, China, April 2000Nanjing City, China, July 2000Dalian City, China, September 2000 PlatformNetscape WebServer+Sun SolarisApache+Linux4Rsync, tool for mirroring sitesWhat is the RsyncFeatures of Rsync can update whole directory

4、trees and optionally preserves symbolic links, hard links, , permissions, devices and times requires no special privileges to install internal pipelining reduces latency for multiple files can use rsh, ssh or direct sockets as the transport supports anonymous rsync which is ideal for mirroring5How t

5、o use RsyncUsing rsh,ssh as the transportClient/Server architecture set rsync server on remote machine running on TCP port 873on the client machine,start rsync with command lineSecurity consideration: C/S+SSHSSH(secure shell) maximum security and privacy on the Internet and local networks combine Rs

6、ync sever with SSH6Configure the Rsync running environmentInstallation and configuration of SSHInstallation and configuration of RsyncMake the CD copy of CPSE and install it on the server in mirror siteTransfer latest changes from the main site in China to the mirror siteHow to set up the mirror sit

7、e of CPSE7Application of new technology to CPSEFlashA new technology and tool to design and deliver low-bandwidth animations, presentations, and Web sites.Simple interactivity by scriptingApplied Examples in CPSEAnimation to show scientific reasons Reasons for lakesInteractive game to test your know

8、ledgeHow to escape from the earthquake spot8Application of new technology to CPSEStreaming Video/Audio produce a streaming video/audio fileShoot - capture edit compress/encode - distributeTwo types of streamingProgressive streamingDownload via httpRequire no special serverHigh qualitySuited for shor

9、t videoReal-Time streamingRequire streaming serverReal time play automatically via RTP/RTSPQuality decided by users connection speedVery suited for long video9Application of new technology to CPSEStreaming Video/AudioApplied Examples CPSEMovies to show wild life10Application of new technology to CPS

10、EVirtual Reality Modeling Language(VRML)A modeling language based on ASCIICan be integrated with Java、Java applet and multimedia filesSuited for internetApplied examples in CPSEShow you a 3D Model 11Application of new technology to CPSEDevelop web-based application using JSPWhats JSP(Java server pages)ExcellencePlatform and server independenceJava advantageScalability in the EnterpriseExamples in CPSEForum12Web site log ObjectiveLearn the web access and improve our serviceLog analysis of mirror sites of CPSETransf