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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="#is-mergerfs-production-ready" class="md-nav__link"> <span class="md-ellipsis"> Is mergerfs "production ready?" </span> </a> </li> <li class="md-nav__item"> <a href="#how-well-does-mergerfs-scale" class="md-nav__link"> <span class="md-ellipsis"> How well does mergerfs scale? </span> </a> </li> </ul> </nav> </div> </div> </div> <div class="md-content" data-md-component="content"> <article class="md-content__inner md-typeset">
<a href="https://github.com/trapexit/mergerfs/tree/master/mkdocs/docs/faq/reliability_and_scalability.md" title="Edit this page" class="md-content__button md-icon"> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M10 20H6V4h7v5h5v3.1l2-2V8l-6-6H6c-1.1 0-2 .9-2 2v16c0 1.1.9 2 2 2h4zm10.2-7c.1 0 .3.1.4.2l1.3 1.3c.2.2.2.6 0 .8l-1 1-2.1-2.1 1-1c.1-.1.2-.2.4-.2m0 3.9L14.1 23H12v-2.1l6.1-6.1z"/></svg> </a> <a href="https://github.com/trapexit/mergerfs/tree/master/mkdocs/docs/faq/reliability_and_scalability.md" title="View source of this page" class="md-content__button md-icon"> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M17 18c.56 0 1 .44 1 1s-.44 1-1 1-1-.44-1-1 .44-1 1-1m0-3c-2.73 0-5.06 1.66-6 4 .94 2.34 3.27 4 6 4s5.06-1.66 6-4c-.94-2.34-3.27-4-6-4m0 6.5a2.5 2.5 0 0 1-2.5-2.5 2.5 2.5 0 0 1 2.5-2.5 2.5 2.5 0 0 1 2.5 2.5 2.5 2.5 0 0 1-2.5 2.5M9.27 20H6V4h7v5h5v4.07c.7.08 1.36.25 2 .49V8l-6-6H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h4.5a8.2 8.2 0 0 1-1.23-2"/></svg> </a>
<h1 id="reliability-and-scalability">Reliability and Scalability</h1><h2 id="is-mergerfs-production-ready">Is mergerfs "production ready?"</h2><p>Yes.</p><p>mergerfs has been around for over a decade and used by many users ontheir systems. Typically running 24/7 with constant load.</p><p>At least a few companies are believed to use mergerfs in productionenvironments. A number of <a href="../../related_projects/">NAS focused operatingsystems</a> includes mergerfs as a solution forpooling filesystems.</p><p>Most serious issues (crashes or data corruption) have been due to<a href="../../known_issues_bugs/#fuse-and-linux-kernel">kernel bugs</a>. All ofwhich are fixed in stable releases.</p><h2 id="how-well-does-mergerfs-scale">How well does mergerfs scale?</h2><p>Users have reported running mergerfs on everything from a Raspberry Pito multi-socket Xeon enterprise servers.</p><p>Users have pooled everything from USB thumb drives to enterprise NVMESSDs to remote filesystems and rclone mounts.</p><p>The cost of many calls can be <code>O(n)</code> meaning adding more branches tothe pool will increase the cost of certain functions but there are anumber of caches and stategies in place to limit overhead wherepossible.</p>
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