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<li class="md-nav__item"> <a href="../functions_categories_and_policies/" class="md-nav__link"> <span class="md-ellipsis"> functions, categories and policies </span>
</a> </li>
<li class="md-nav__item"> <a href="../func_readdir/" class="md-nav__link"> <span class="md-ellipsis"> func.readdir </span>
</a> </li>
<li class="md-nav__item"> <a href="../rename_and_link/" class="md-nav__link"> <span class="md-ellipsis"> rename and link </span>
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<li class="md-nav__item"> <a href="../pin-threads/" class="md-nav__link"> <span class="md-ellipsis"> pin-threads </span>
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<li class="md-nav__item"> <a href="../link_cow/" class="md-nav__link"> <span class="md-ellipsis"> link_cow </span>
</a> </li>
<li class="md-nav__item"> <a href="../fuse_msg_size/" class="md-nav__link"> <span class="md-ellipsis"> fuse_msg_size </span>
</a> </li>
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</a> </li>
<li class="md-nav__item"> <a href="../link-exdev/" class="md-nav__link"> <span class="md-ellipsis"> link-exdev </span>
</a> </li>
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</a> </li>
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</a> </li>
<li class="md-nav__item"> <a href="../nfsopenhack/" class="md-nav__link"> <span class="md-ellipsis"> nfsopenhack </span>
</a> </li>
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</a> </li>
<li class="md-nav__item"> <a href="../flush-on-close/" class="md-nav__link"> <span class="md-ellipsis"> flush-on-close </span>
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<nav class="md-nav md-nav--secondary" aria-label="Table of contents"> <label class="md-nav__title" for="__toc"> <span class="md-nav__icon md-icon"></span> Table of contents </label> <ul class="md-nav__list" data-md-component="toc" data-md-scrollfix> <li class="md-nav__item"> <a href="#branch-mode" class="md-nav__link"> <span class="md-ellipsis"> branch mode </span> </a> </li> <li class="md-nav__item"> <a href="#minfreespace" class="md-nav__link"> <span class="md-ellipsis"> minfreespace </span> </a> </li> <li class="md-nav__item"> <a href="#globbing" class="md-nav__link"> <span class="md-ellipsis"> globbing </span> </a> </li> </ul> </nav> </div> </div> </div> <div class="md-content" data-md-component="content"> <article class="md-content__inner md-typeset">
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<h1 id="branches">branches</h1><p>The 'branches' argument is a colon (':') delimited list of paths to bepooled together. It does not matter if the paths are on the same ordifferent filesystems nor does it matter the filesystem type (withinreason). Used and available space will not be duplicated for paths onthe same filesystem and any features which aren't supported by theunderlying filesystem (such as file attributes or extended attributes)will return the appropriate errors.</p><p>Branches currently have two options which can be set. A type whichimpacts whether or not the branch is included in a policy calculationand a individual minfreespace value. The values are set by prependingan <code>=</code> at the end of a branch designation and using commas asdelimiters. Example: <code>/mnt/drive=RW,1234</code></p><h3 id="branch-mode">branch mode</h3><ul><li>RW: (read/write) - Default behavior. Will be eligible in all policy categories.</li><li>RO: (read-only) - Will be excluded from <code>create</code> and <code>action</code> policies. Same as a read-only mounted filesystem would be (though faster to process).</li><li>NC: (no-create) - Will be excluded from <code>create</code> policies. You can't create on that branch but you can change or delete.</li></ul><h3 id="minfreespace">minfreespace</h3><p>Same purpose and syntax as the global option but specific to thebranch. If not set the global value is used.</p><h3 id="globbing">globbing</h3><p>To make it easier to include multiple branches mergerfs supports<a href="http://linux.die.net/man/7/glob">globbing</a>. <strong>The globbing tokensMUST be escaped when using via the shell else the shell itself willapply the glob itself.</strong></p><div class="language-text highlight"><pre><span></span><code><span id="__span-0-1"><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a># mergerfs /mnt/hdd\*:/mnt/ssd /media</span></code></pre></div><p>The above line will use all mount points in /mnt prefixed with <strong>hdd</strong>and <strong>ssd</strong>.</p><p>To have the pool mounted at boot or otherwise accessible from relatedtools use <code>/etc/fstab</code>.</p><div class="language-text highlight"><pre><span></span><code><span id="__span-1-1"><a id="__codelineno-1-1" name="__codelineno-1-1" href="#__codelineno-1-1"></a># <file system> <mount point> <type> <options> <dump> <pass></span><span id="__span-1-2"><a id="__codelineno-1-2" name="__codelineno-1-2" href="#__codelineno-1-2"></a>/mnt/hdd*:/mnt/ssd /media mergerfs minfreespace=16G 0 0</span></code></pre></div><p><strong>NOTE:</strong> The globbing is done at mount or when updated using the runtime API. If a new directory is added matching the glob after the fact it will not be automatically included.</p>
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