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<title>Core client: file structure</title>
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<body bgcolor=ffffff>
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<h2>Core client: file structure</h2>
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<p>
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The core client runs in a <b>BOINC home directory</b>.
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It creates and uses the following files and directories within the
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home directory:
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<ul>
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<li>
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<b>prefs.xml</b>:
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The user's latest preferences; see below.
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<li>
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<b>client_state.xml</b>: a description of the files,
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application, workunits and results present on this client.
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<li>
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Each project has a <b>project subdirectory</b> whose name is an encoded
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version of the project's master URL.
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This subdirectory contains all files (inputs,
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outputs, executables) related to the project.
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<li>
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<b>slots</b>: this directory contains one subdirectory for each
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CPU "slot" (normally there are as many slots as the host has CPUs).
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The subdirectories are named 0, 1, ... N-1.
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</ul>
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<p>
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Each result executes in particular slot directory.
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The core client creates "soft link" files in the slot directory,
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linking to the corresponding files in the project directory.
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<h3>Format of prefs.xml</h3>
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<p>
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This format of prefs.xml is as follows:
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<pre>
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<preferences>
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<prefs_mod_time>1030128387</prefs_mod_time>
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<from_project>http://www.myproject.com/</from_project>
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<from_scheduler>http://server3.myproject.com/cgi-bin/scheduler_cgi</from_scheduler>
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<mod_time>2</mod_time>
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<high_water_days>2</high_water_days>
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<low_water_days>1</low_water_days>
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<project>
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<master_url>http://www.myproject.com/</master_url>
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<authenticator>3f7b90793a0175ad0bda68684e8bd136</authenticator>
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<resource_share>1</resource_share>
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</project>
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<project>
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<master_url>http://www.project2.com/</master_url>
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<authenticator>3f7b90793a0175ad0bda68684e8bd136</authenticator>
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<resource_share>1</resource_share>
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</project>
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</preferences>
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</pre>
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