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BOINC Architecture and basic principles Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 1 Contents Introduction Basic structure of BOINC The clients The server BOINCification of applications Juan Antonio

  1. BOINC Architecture and basic principles Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 1

  2. Contents Introduction Basic structure of BOINC The clients The server BOINCification of applications Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 2

  3. Introduction Brief history 1967: Jocelyn Bell discover astronomical radio signals pulsating at regular intervals. Extra-terrestrial signals? Finally just pulsars 1992: MOP (Microwave Observing Program). First SETI project by NASA. Cancelled by U.S. Congress 1 year after. 1995: Project Phoenix by SETI program. Private funding. Then, David Gedye proposed to analyse those signals using a virtual supercomputer composed of large numbers of volunteered Internet-connected computers SETI@home Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 3

  4. Introduction 1999: Launch of the SETI@home project 2004: Next generation of SETI@home software using the BOINC platform Currently SETI@home has > 9 million years of aggregate computing time > 5 millions of clients Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 4

  5. Introduction Other BOINC-powered projects: > 10.000 CPU years processed > 115 000 registered CPUs > 6.800 CPU years processed > 137 000 registered CPUs > 1.700 CPU years processed > 84 000 registered CPUs > 700 CPU years processed > 44 000 registered CPUs 1 CPU = 1 KSfp2K = 2.8 GHz Xeon Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 5

  6. Introduction Berkeley Open Infrastructure for Network Computing “software platform for distributed computing using volunteered computer resources” http://boinc.berkeley.edu it uses the unused CPU cycles to analyse scientific data Structure of type client-server Free and open source Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 6

  7. Contents Introduction Basic structure of BOINC The clients The server BOINCification of applications Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 7

  8. Basic structure of BOINC BOINC can be seen as a kind of Grid . Main features: BOINC requires applications with some restrictions like small I/O ratio and high CPU requirements. Other Grids have no limitations BOINC infrastructure is lighter (it just needs a server) BOINC clients are in most cases volunteered machines It's possible to send BOINC jobs to other kinds of Grid environments and vice versa Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 8

  9. Basic structure of BOINC BOINC infrastructure Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 9

  10. Basic structure of BOINC Interaction between client and server Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 10

  11. Basic structure of BOINC Identifying erroneous results and obtaining credits This process is called Redundant Computing Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 11

  12. Basic structure of BOINC Identifying erroneous results and obtaining credits Each result has a timeout. If it doesn't arrive on that time, it is re-sent to another client. They can also be sent then to a dedicated farm (meta scheduling) We can customize the number of machines we send the same job how many equal results we need to consider a result as good the timeout Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 12

  13. Basic structure of BOINC BOINC uses code signing to prevent malicious executable distribution All files associated with the applications are sent with digital signatures (they can also be created by BOINC) Each project has a key pair for code signing (private key in the server, public one in the clients) Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 13

  14. Basic structure of BOINC The application and all the required files are placed in a secured sandbox . Their physical names must be “resolved” using the BOINC API to be able to access them. BOINC also prevents denial of service attacks to the server, result falsifications and credit falsifications . Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 14

  15. Contents Introduction Basic structure of BOINC The clients The server BOINCification of applications Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 15

  16. The clients Steps to participate in a BOINC project 1.Selection of the project/s in which the user will participate 2.User registration 3.Client software download 4.Attachment of the client software to the selected project/s Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 16

  17. The clients 1. Selection of the project/s in which the user will participate Current available projects: see http://boinc.berkeley.edu Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 17

  18. The clients 1. Selection of the project/s in which the user will participate It's very important for the project to attract the volunteers spending some time having a nice web explaining the relevance of the project in which they will collaborate Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 18

  19. The clients 2. User registration Standard web interface for all BOINC projects create account Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 19

  20. The clients 2. User registration Registration process: Fill the web form Receive the confirmation mail with the account key Repeat the registration for other possible projects Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 20

  21. The clients 3. Download of the client software From the BOINC web site or from each project's web site Available for different platforms Windows Linux / 86 Mac OS X Solaris / Sparc Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 21

  22. The clients 3. Download of the client software In Windows the software is an .exe file to be executed and installed in the usual Windows way It works as a screen saver application. Works when the computer is idle. Shows nice images/animations while the computation is being performed. The screen savers depend on the application and have to be provided by each one (there is a BOINC default one). Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 22

  23. The clients 3. Download of the client software In Linux (and the other UNIX-like systems) the software is mainly a binary which you copy and execute were you wish. There is also a GUI manager Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 23

  24. The clients 3. Download of the client software No RPM or DEB currently available at BOINC web page but one developed by us at CERN It's recommended to run the client as a daemon and executed by a special user The process involves the creation of the user, the installation of the program and the execution of a startup script. Our RPM does that in our lxboinc cluster attaching BOINC to LHC@home. Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 24

  25. The clients 4. Attachment of the client software to the selected project/s You have to tell to the client the project/s URL and their account key/s In Windows (now also in the Linux/UNIX versions) you use a GUI In Linux/UNIX versions you can also execute a command You can de-attach from a given project or join another ones at any moment using the same ways You can also join different groups to compete for credits Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 25

  26. The clients Execution of the client In Windows is a screen saver. In Linux/UNIX you just execute the binary, which runs in low priority mode. It shows the log information directly to the screen so you usually redirect it to log files. Of course, then you have to manage those log files as they increase without limit. Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 26

  27. The clients Monitoring of the work done You have a graphical interface (installed with the client in Windows and Linux/UNIX) which gives some basic information regarding the performed work In Linux/UNIX you also have the standard output / error of the application (usually redirected to plain text log files). In the project's public web interface, the users can log in and see their current and claimed credits. You also have different public web services to monitor the current status of a given client and its evolution (groups). Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 27

  28. The clients User web interface log in to see your credits & options Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 28

  29. Contents Introduction Basic structure of BOINC The clients The server BOINCification of applications Juan Antonio Lopez Perez, CERN BOINC Computing Seminar December 8, 2005 Slide 29

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