mirror of https://github.com/BOINC/boinc.git
56 lines
2.0 KiB
HTML
56 lines
2.0 KiB
HTML
<body bgcolor=ffffff>
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<h2>Compute model: workunits</h2>
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<p>
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A <b>workunit</b> describes a computation to be performed.
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Workunits are maintained in the <b>workunit</b> table in the BOINC DB.
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The attributes of a workunit include:
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<ul>
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<li> Its application.
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<li> Its name (unique across all workunits in the project).
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<li> An XML document describing its input files and other parameters
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(see below).
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<li> The estimated resource requirements of the work unit
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(computation, memory, disk space, network traffic).
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<li> Counts of how many times this workunit should be dispatched,
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how many times it has been dispatched, how many results have
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been returned, and how many failures have occurred.
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</ul>
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<p>
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The inputs to a workunit are described by an XML document of the form
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<pre>
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[ <file_info>...</file_info> ]
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[ ... ]
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<workunit>
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<name>foobar</name>
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<app_name>blah</app_name>
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[ <command_line>-flags xyz</command_line> ]
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[ <env_vars>name=val&name=val</env_vars> ]
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[ <file_ref>...</file_ref> ]
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[ ... ]
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<workunit>
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</pre>
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The components are:
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<ul>
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<li> The <b><name></b> element is the name of the workunit.
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<li> The <b><app_name></b> element is the name of the application.
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<li> The <b><command_line></b> element, if present,
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is the command-line arguments to be passed to the main program.
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<li> The <b><env_vars></b> element, if present,
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is a list of environment variables to be passed to the main program.
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<li> Each <b><file_ref></b> element describes a
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<a href=files.html>reference</a> to an input file,
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each of which is described by a <b><file_info></b> element.
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</ul>
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<p>
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A workunit is associated with an application,
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not with a particular version or set of versions.
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If the format of your input data changes in a way that
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is incompatible with older versions,
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you must create a new application.
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This can often be avoided by using XML data format.
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<p>
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The <a href=tools.html>create_work</a> utility program
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provides a simplified interface for creating workunits.
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