mirror of https://github.com/BOINC/boinc.git
42 lines
1.3 KiB
PHP
42 lines
1.3 KiB
PHP
<?php
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require_once("docutil.php");
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page_head("Homogeneous redundancy ");
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echo"
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Most numerical applications produce different outcomes
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for a given workunit depending on the machine
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architecture, operating system, compiler, and compiler flags.
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In such cases it may be difficult to distinguish
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between results that are correct but differ because
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of numerical variation,
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and results that are erroneous.
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<p>
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BOINC provides a feature called <b>homogeneous redundancy</b>
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for such applications.
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You can enable it for a project by including the line
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<pre>
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<homogeneous_redundancy/>
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</pre>
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in the <a href=configuration.php>config.xml</a> file.
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<p>
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Alternatively, you can enable it selectively for a single
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application by setting the
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<code>homogeneous_redundancy</code> field in its database record.
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<p>
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When this feature is enabled,
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the BOINC scheduler will send results for a given workunit
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only to hosts with the same operation system name and CPU vendor
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(i.e., the os_name and p_vendor fields of the host description).
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For example: if a result has been sent to a host of type
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(Windows XP, Intel), then other results of that workunit will
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only be sent to hosts of type (Windows XP, Intel).
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<p>
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If homogeneous redundancy is enabled,
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it may be possible to use strict equality to compare redundant results.
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";
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page_tail();
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?>
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