<p></p>
<blockquote>
<ul dir="auto">
<li>Changesets in the planet OSM files contain user data, but tools like Osmosis and Osmium cannot directly link users to contributions in a database.</li>
<li>Full history dumps provide the necessary data but are massive (~223 GB compressed, ~3.7 TB uncompressed) and complex to process.</li>
</ul>
</blockquote>
<p dir="auto">If you're looking in the context of openstreetmap-website, this data is already present in the database and you'd never look at the dumps. You'd only use the planet files if you were building something external.</p>

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