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<li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_3" > <label class="md-nav__link" for="__nav_3" id="__nav_3_label" tabindex="0"> <span class="md-ellipsis"> Installation </span>
<span class="md-nav__icon md-icon"></span> </label> <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_3_label" aria-expanded="false"> <label class="md-nav__title" for="__nav_3"> <span class="md-nav__icon md-icon"></span> Installation </label> <ul class="md-nav__list" data-md-scrollfix> <li class="md-nav__item"> <a href="../setup/installation/" class="md-nav__link"> <span class="md-ellipsis"> Installation </span>
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<li class="md-nav__item"> <a href="../setup/upgrade/" class="md-nav__link"> <span class="md-ellipsis"> Upgrade </span>
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<span class="md-nav__icon md-icon"></span> </label> <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_4_label" aria-expanded="false"> <label class="md-nav__title" for="__nav_4"> <span class="md-nav__icon md-icon"></span> Config </label> <ul class="md-nav__list" data-md-scrollfix> <li class="md-nav__item"> <a href="../config/terminology/" class="md-nav__link"> <span class="md-ellipsis"> Terminology </span>
</a> </li>
<li class="md-nav__item"> <a href="../config/options/" class="md-nav__link"> <span class="md-ellipsis"> Options </span>
</a> </li>
<li class="md-nav__item"> <a href="../config/deprecated_options/" class="md-nav__link"> <span class="md-ellipsis"> Deprecated Options </span>
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<li class="md-nav__item"> <a href="../config/branches/" class="md-nav__link"> <span class="md-ellipsis"> branches </span>
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<li class="md-nav__item"> <a href="../config/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="../config/func_readdir/" class="md-nav__link"> <span class="md-ellipsis"> func.readdir </span>
</a> </li>
<li class="md-nav__item"> <a href="../config/rename_and_link/" class="md-nav__link"> <span class="md-ellipsis"> rename and link </span>
</a> </li>
<li class="md-nav__item"> <a href="../config/cache/" class="md-nav__link"> <span class="md-ellipsis"> caching </span>
</a> </li>
<li class="md-nav__item"> <a href="../config/readahead/" class="md-nav__link"> <span class="md-ellipsis"> readahead </span>
</a> </li>
<li class="md-nav__item"> <a href="../config/inodecalc/" class="md-nav__link"> <span class="md-ellipsis"> inodecalc </span>
</a> </li>
<li class="md-nav__item"> <a href="../config/threads/" class="md-nav__link"> <span class="md-ellipsis"> threads </span>
</a> </li>
<li class="md-nav__item"> <a href="../config/pin-threads/" class="md-nav__link"> <span class="md-ellipsis"> pin-threads </span>
</a> </li>
<li class="md-nav__item"> <a href="../config/link_cow/" class="md-nav__link"> <span class="md-ellipsis"> link_cow </span>
</a> </li>
<li class="md-nav__item"> <a href="../config/fuse_msg_size/" class="md-nav__link"> <span class="md-ellipsis"> fuse_msg_size </span>
</a> </li>
<li class="md-nav__item"> <a href="../config/follow-symlinks/" class="md-nav__link"> <span class="md-ellipsis"> follow-symlinks </span>
</a> </li>
<li class="md-nav__item"> <a href="../config/link-exdev/" class="md-nav__link"> <span class="md-ellipsis"> link-exdev </span>
</a> </li>
<li class="md-nav__item"> <a href="../config/rename-exdev/" class="md-nav__link"> <span class="md-ellipsis"> rename-exdev </span>
</a> </li>
<li class="md-nav__item"> <a href="../config/symlinkify/" class="md-nav__link"> <span class="md-ellipsis"> symlinkify </span>
</a> </li>
<li class="md-nav__item"> <a href="../config/nullrw/" class="md-nav__link"> <span class="md-ellipsis"> nullrw </span>
</a> </li>
<li class="md-nav__item"> <a href="../config/xattr/" class="md-nav__link"> <span class="md-ellipsis"> xattr </span>
</a> </li>
<li class="md-nav__item"> <a href="../config/nfsopenhack/" class="md-nav__link"> <span class="md-ellipsis"> nfsopenhack </span>
</a> </li>
<li class="md-nav__item"> <a href="../config/ioctl/" class="md-nav__link"> <span class="md-ellipsis"> ioctl </span>
</a> </li>
<li class="md-nav__item"> <a href="../config/statfs/" class="md-nav__link"> <span class="md-ellipsis"> statfs / statvfs </span>
</a> </li>
<li class="md-nav__item"> <a href="../config/flush-on-close/" class="md-nav__link"> <span class="md-ellipsis"> flush-on-close </span>
</a> </li>
<li class="md-nav__item"> <a href="../config/export-support/" class="md-nav__link"> <span class="md-ellipsis"> export-support </span>
</a> </li>
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<li class="md-nav__item"> <a href="../error_handling/" class="md-nav__link"> <span class="md-ellipsis"> Error Handling </span>
</a> </li>
<li class="md-nav__item"> <a href="../runtime_interfaces/" class="md-nav__link"> <span class="md-ellipsis"> Runtime Interfaces </span>
</a> </li>
<li class="md-nav__item"> <a href="../remote_filesystems/" class="md-nav__link"> <span class="md-ellipsis"> Remote Filesystems </span>
</a> </li>
<li class="md-nav__item"> <a href="../tips_notes/" class="md-nav__link"> <span class="md-ellipsis"> Tips and Notes </span>
</a> </li>
<li class="md-nav__item"> <a href="../known_issues_bugs/" class="md-nav__link"> <span class="md-ellipsis"> Known Issues and Bugs </span>
</a> </li>
<li class="md-nav__item"> <a href="../project_comparisons/" class="md-nav__link"> <span class="md-ellipsis"> Project Comparisons </span>
</a> </li>
<li class="md-nav__item"> <a href="../performance/" class="md-nav__link"> <span class="md-ellipsis"> Tweaking Performance </span>
</a> </li>
<li class="md-nav__item"> <a href="../benchmarking/" class="md-nav__link"> <span class="md-ellipsis"> Benchmarking </span>
</a> </li>
<li class="md-nav__item"> <a href="../tooling/" class="md-nav__link"> <span class="md-ellipsis"> Tooling </span>
</a> </li>
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<span class="md-nav__icon md-icon"></span> </label> <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_14_label" aria-expanded="false"> <label class="md-nav__title" for="__nav_14"> <span class="md-nav__icon md-icon"></span> FAQ </label> <ul class="md-nav__list" data-md-scrollfix> <li class="md-nav__item"> <a href="../faq/reliability_and_scalability/" class="md-nav__link"> <span class="md-ellipsis"> Reliability and Scalability </span>
</a> </li>
<li class="md-nav__item"> <a href="../faq/usage_and_functionality/" class="md-nav__link"> <span class="md-ellipsis"> Usage and Functionality </span>
</a> </li>
<li class="md-nav__item"> <a href="../faq/configuration_and_policies/" class="md-nav__link"> <span class="md-ellipsis"> Configuration and Policies </span>
</a> </li>
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</a> </li>
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</a> </li>
<li class="md-nav__item"> <a href="../faq/technical_behavior_and_limitations/" class="md-nav__link"> <span class="md-ellipsis"> Technical Behavior and Limitations </span>
</a> </li>
<li class="md-nav__item"> <a href="../faq/limit_drive_spinup/" class="md-nav__link"> <span class="md-ellipsis"> Limit drive spinup </span>
</a> </li>
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<li class="md-nav__item"> <a href="../related_projects/" class="md-nav__link"> <span class="md-ellipsis"> Related Projects </span>
</a> </li>
<li class="md-nav__item"> <a href="../media_and_publicity/" class="md-nav__link"> <span class="md-ellipsis"> Media and Publicity </span>
</a> </li>
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<span class="md-nav__icon md-icon"></span> </label> <a href="./" class="md-nav__link md-nav__link--active"> <span class="md-ellipsis"> Support </span>
</a>
<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="#information-to-include-in-bug-reports" class="md-nav__link"> <span class="md-ellipsis"> Information to include in bug reports </span> </a> </li> <li class="md-nav__item"> <a href="#contact-issue-submission" class="md-nav__link"> <span class="md-ellipsis"> Contact / Issue submission </span> </a> <nav class="md-nav" aria-label="Contact / Issue submission"> <ul class="md-nav__list"> <li class="md-nav__item"> <a href="#donations" class="md-nav__link"> <span class="md-ellipsis"> Donations </span> </a> </li> </ul> </nav> </li> </ul> </nav> </li>
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<h1 id="support">Support</h1><p>Filesystems are complex, as are the interactions software have withthem, and therefore difficult to debug. When reporting on a suspectedissue <strong>please</strong> include as much of the below information as possibleotherwise it will be difficult or impossible to diagnose. Also pleaseread the documentation as it provides details on many previouslyencountered questions/issues.</p><p><strong>Please make sure you are using the <a href="https://github.com/trapexit/mergerfs/releases">latestrelease</a> or have triedit in comparison. Old versions, which are often included in distroslike Debian and Ubuntu, are not ever going to be updated and the issueyou are encountering may have been addressed already.</strong></p><p><strong>For commercial support or feature requests please <a href="mailto:support@spawn.link">contact medirectly.</a></strong></p><h3 id="information-to-include-in-bug-reports">Information to include in bug reports</h3><ul><li><a href="https://xyproblem.info">Information about the broader problem along with any attempted solutions.</a></li><li>Solution already ruled out and why.</li><li>Version of mergerfs: <code>mergerfs --version</code></li><li>mergerfs settings / arguments: from fstab, systemd unit, command line, OMV plugin, etc.</li><li>Version of the OS: <code>uname -a</code> and <code>lsb_release -a</code></li><li>List of branches, their filesystem types, sizes (before and after issue): <code>df -h</code></li><li><strong>All</strong> information about the relevant paths and files: permissions, ownership, etc.</li><li><strong>All</strong> information about the client app making the requests: version, uid/gid</li><li>Runtime environment:</li><li>Is mergerfs running within a container?</li><li>Are the client apps using mergerfs running in a container?</li><li>A <code>strace</code> of the app having problems:</li><li><code>strace -fvTtt -s 256 -o /tmp/app.strace.txt <cmd></code></li><li>A <code>strace</code> of mergerfs while the program is trying to do whatever it is failing to do:</li><li><code>strace -fvTtt -s 256 -p <mergerfsPID> -o /tmp/mergerfs.strace.txt</code></li><li><strong>Precise</strong> directions on replicating the issue. Do not leave <strong>anything</strong> out.</li><li>Try to recreate the problem in the simplest way using standard programs: <code>ln</code>, <code>mv</code>, <code>cp</code>, <code>ls</code>, <code>dd</code>, etc.</li></ul><h3 id="contact-issue-submission">Contact / Issue submission</h3><ul><li>github.com: <a href="https://github.com/trapexit/mergerfs/issues">https://github.com/trapexit/mergerfs/issues</a></li><li>discord: <a href="https://discord.gg/MpAr69V">https://discord.gg/MpAr69V</a></li><li>reddit: <a href="https://www.reddit.com/r/mergerfs">https://www.reddit.com/r/mergerfs</a></li></ul><h4 id="donations">Donations</h4><p>https://github.com/trapexit/support</p><p>Development and support of a project like mergerfs requires asignificant amount of time and effort. The software is released underthe very liberal ISC license and is therefore free to use for personalor commercial uses.</p><p>If you are a personal user and find mergerfs and its support valuableand would like to support the project financially it would be verymuch appreciated.</p><p>If you are using mergerfs commercially please consider sponsoring theproject to ensure it continues to be maintained and receiveupdates. If custom features are needed feel free to <a href="mailto:support@spawn.link">contact medirectly</a>.</p>
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