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  <section id="environment-variables">
<h1>Environment Variables<a class="headerlink" href="#environment-variables" title="Link to this heading"></a></h1>
<p>The behavior of the client can also be controlled using environment variables. The value of the environment variables overrides the values in the configuration file.</p>
<p>The environment variables are:</p>
<ul class="simple">
<li><p><cite>OWNCLOUD_CHUNK_SIZE</cite> (default: 5242880; 5 MiB) – Specifies the chunk size of uploaded files in bytes. Increasing this value may help with synchronization problems in certain configurations.</p></li>
<li><p><cite>OWNCLOUD_TIMEOUT</cite> (default: 300 s) – The timeout for network connections in seconds.</p></li>
<li><p><cite>OWNCLOUD_CRITICAL_FREE_SPACE_BYTES</cite> (default: 512*1000*1000 bytes) - The minimum disk space needed for operation. A fatal error is raised if less free space is available.</p></li>
<li><p><cite>OWNCLOUD_FREE_SPACE_BYTES</cite> (default: 1000*1000*1000 bytes) - Downloads that would reduce the free space below this value are skipped. More information available under the “Low Disk Space” section.</p></li>
<li><p><cite>OWNCLOUD_MAX_PARALLEL</cite> (default: 6) - Maximum number of parallel jobs.</p></li>
<li><p><cite>OWNCLOUD_BLACKLIST_TIME_MIN</cite> (default: 25 s) - Minimum timeout for blacklisted files.</p></li>
<li><p><cite>OWNCLOUD_BLACKLIST_TIME_MAX</cite> (default: 24*60*60 s; one day) - Maximum timeout for blacklisted files.</p></li>
</ul>
<section id="low-disk-space">
<h2>Low Disk Space<a class="headerlink" href="#low-disk-space" title="Link to this heading"></a></h2>
<p>When disk space is low the Nextcloud Client will be unable to synchronize all files. This section describes its behavior in a low disk space situation as well as the options that influence it.</p>
<ol class="arabic simple">
<li><p>Synchronization of a folder aborts entirely if the remaining disk space falls below 512 MB. This threshold can be adjusted with the <code class="docutils literal notranslate"><span class="pre">OWNCLOUD_CRITICAL_FREE_SPACE_BYTES</span></code> environment variable.</p></li>
<li><p>Downloads that would reduce the free disk space below 1 GB will be skipped or aborted. The download will be retried regularly and other synchronization is unaffected. This threshold can be adjusted with the <code class="docutils literal notranslate"><span class="pre">OWNCLOUD_FREE_SPACE_BYTES</span></code> environment variable.</p></li>
</ol>
</section>
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