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<h1>FAQ - Recording downloads via MirrorBrain</h1>
<h2>Why do we measure downloads?</h2>
<p>One of the <a href="http://marketing.openoffice.org/">Marketing
Project's</a> key statistics is the number of downloads from the
OpenOffice.org site. This gives us immediate feedback on the success of
promotional activities, such as <a href=
"http://marketing.openoffice.org/press_releases.html">press releases</a>,
as well as trend information over time.</p>
<h2>What is MirrorBrain?</h2>
<p>When people request a download from the <a href=
"http://downloads.openoffice.org/">OpenOffice.org download page</a>, they
are directed to <a href="http://mirrorbrain.org/">MirrorBrain</a>. MirrorBrain redirects them to their nearest
mirror site for the download they require, and records the request in a
log file.</p>
<h2>Does MirrorBrain provide the full story?</h2>
<p><strong>No!</strong> - it only records downloads started a single
point, the <a href="http://downloads.openoffice.org/">OpenOffice.org
download page</a>. It omits:</p>
<ul>
<li>downloads which people make directly from mirrors</li>
<li>downloads via other mechanisms, such as <a href=
"http://distribution.openoffice.org/p2p/">peer-to-peer
networks</a></li>
<li>downloads from other third-party repositories - including GNU/Linux
distributions (see next question)</li>
</ul>
<p>Note also that MirrorBrain logs when it successfully redirects someone
to a download site - if the user chooses not to download, or cancels the
download, then MirrorBrain will not be aware.</p>
<h2>Why do MirrorBrain figures look low for GNU/Linux?</h2>
<p>The OpenOffice.org Community provides OpenOffice.org software in the
two most common GNU/Linux package formats (rpm and deb). However, the
majority of GNU/Linux users receive software direct from their
distributor's respositories. This is a significant omission and explains
the relatively low number of GNU/Linux downloads in our figures. How big
is the gap? When we released OpenOffice.org 3.0, Ubuntu - possibly the
largest desktop GNU/Linux variant - <a href=
"http://www.theregister.co.uk/2008/10/27/shuttleworth_ubuntu_commitment/">
estimated</a> they had around eight million users.</p>
<h2>Are MirrorBrain downloads the same as the number of users ?</h2>
<p>No. Nothing like it.</p>
<ul>
<li>MirrorBrain records only a percentage of total downloads (see
above)</li>
<li>Downloads are only one distribution method - people buy CD-ROMs, or
get one from a magazine cover, or borrow one from friends...; people
buy PCs with OpenOffice.org pre-installed... etc.</li>
<li>One download or CD-ROM can be installed on thousands of computers -
or none at all</li>
</ul>
<p>Note: the <a href="http://distribution.openoffice.org/">Distribution
Project</a> exists to make OpenOffice.org available through as many
channels as possible.</p>
<h2>Do other people provide statistics?</h2>
<p>Several of the <a href=
"http://projects.openoffice.org/native-lang.html">Native-Language
Projects</a> record download information for their languages.</p>
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