BOINC's architecture is 'open'; documented interfaces making it possible to develop various types of applications and web sites that interact with BOINC's core components. Examples include: "; list_start(); list_item("Client GUIs", "Application that control a local or remote core client." ); list_item("Credit statistics web sites", "Web sites showing credit information (project totals, user/team/country leaderboards) based on daily XML feeds of statistics data from BOINC projects." ); list_item("Account managers", "Web sites that let BOINC users create and manage accounts on multiple projects." ); list_item("Server status web sites", "Web sites showing the server status of BOINC projects." ); list_item("Web RPCs", "These interfaces let a program or web site obtain information about users and hosts from projects." ); list_item("Local editing of preferences", "This mechanism lets you write a program local editing of preferences." ); list_end(); echo "

Check the index of add-on software before writing anything (it may already exist). The index has instructions for submitting new add-ons.

Get and build BOINC software

• Get BOINC source code
• Building server software
• Building applications
• Building BOINC client software

BOINC development

• Personnel and contributors
• Development information flow
• The BOINCzilla bug database.
• boinc_dev, an email list for BOINC developers.
• Implementation notes
• BOINC coding style
• The BOINC testing framework

BOINC is free software, distributed under the Lesser GNU Public License (LGPL). We need volunteers to help with software testing and development. If you have one or more of the relevant technical skills (C++ system programming, PHP/MySQL web development, WxWidgets programming, autoconf/automake expertise, etc.) you may be able to help us maintain and enhance BOINC. The University of California holds the copyright on all BOINC source code; by contributing code to BOINC you implicitly assign the copyright to the University of California. In any case, you are welcome to browse the source code and give us feedback. You should understand how BOINC works (for both participants and projects) before getting into the source code.

To get started, find a small bug fix or enhancement to do (look at the BOINC bug database, the email lists, or message boards for ideas). Look at the source code and think about how you would implement it. Then communicate with the area owner, sketching what you want to do and how. Work the the area owner to carry out and check in the work.

The following medium-to-large development projects are available:

• Applications
  • Write an example compound application (and suggest API revisions to make this easier).
• Core client:
  • Do per-project disk-space measurements asynchronously (in a thread).
  • Extend general preferences to allow users to specify different time-of-day restrictions for different days of the week.
  • Write a simulator for the CPU scheduler and work fetch policies (Derrick Kondo is working on this).
  • Log result start/ends (for use by 3rd-party software like BoincView).
  • Prevent disk space usage from exceeding user preferences, and enforce resource shares, with file deletion according to project policy.
• BOINC Manager:
  • Advanced prefs dialog
  • Show progress bars for file transfers and in-progress results (this requires changing the container class from Spreadsheet to Grid).
  • Sortable columns in the Work tab.
• Server/Back End:
  • Implement a mechanism so that server software detects incompatible database format
  • Scheduler: implement mechanisms so that server:
    • Sends only results likely to finish by their deadline
    • Sends commands to abort results that can't get credit
    • Sends commands to recommend abort of results that may get credit, but are not useful (i.e. canonical result already found)
    • Attempts to send results from the same WU to hosts with similar speed, so that a fast host doesn't have to wait weeks to get credit.
  • Implement a 'benchmark result' mechanism: every host runs a benchmark result per app version, and the CPU time determines credit/CPU for future results