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Installation
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Upgrade
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Build
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Intro to Filesystems
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Config
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</li>
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<li class="md-nav__item">
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<a href="../config/deprecated_options/" class="md-nav__link">
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<span class="md-ellipsis">
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Deprecated Options
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../config/branches/" class="md-nav__link">
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<span class="md-ellipsis">
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branches
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../config/branches-mount-timeout/" class="md-nav__link">
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<span class="md-ellipsis">
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branches-mount-timeout
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../config/functions_categories_policies/" class="md-nav__link">
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<span class="md-ellipsis">
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functions, categories and policies
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../config/minfreespace/" class="md-nav__link">
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<span class="md-ellipsis">
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minfreespace
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../config/func_readdir/" class="md-nav__link">
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<span class="md-ellipsis">
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func.readdir
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../config/rename_and_link/" class="md-nav__link">
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<span class="md-ellipsis">
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rename and link
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</span>
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</a>
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</li>
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<li class="md-nav__item">
|
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<a href="../config/moveonenospc/" class="md-nav__link">
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<span class="md-ellipsis">
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moveonenospc
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</span>
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</a>
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</li>
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<li class="md-nav__item">
|
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<a href="../config/cache/" class="md-nav__link">
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<span class="md-ellipsis">
|
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caching
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</span>
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</a>
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</li>
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<li class="md-nav__item">
|
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<a href="../config/passthrough/" class="md-nav__link">
|
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|
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<span class="md-ellipsis">
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passthrough.io
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</span>
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</a>
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</li>
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<li class="md-nav__item">
|
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<a href="../config/readahead/" class="md-nav__link">
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<span class="md-ellipsis">
|
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readahead
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</span>
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</a>
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</li>
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<li class="md-nav__item">
|
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<a href="../config/inodecalc/" class="md-nav__link">
|
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|
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<span class="md-ellipsis">
|
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inodecalc
|
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</span>
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</a>
|
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</li>
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<li class="md-nav__item">
|
|
<a href="../config/threads/" class="md-nav__link">
|
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|
|
<span class="md-ellipsis">
|
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|
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|
threads
|
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</span>
|
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</a>
|
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</li>
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<li class="md-nav__item">
|
|
<a href="../config/pin-threads/" class="md-nav__link">
|
|
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|
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|
|
<span class="md-ellipsis">
|
|
|
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|
|
pin-threads
|
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|
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</span>
|
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</a>
|
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</li>
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<li class="md-nav__item">
|
|
<a href="../config/proxy-ioprio/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
proxy-ioprio
|
|
|
|
|
|
|
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</span>
|
|
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|
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|
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</a>
|
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</li>
|
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<li class="md-nav__item">
|
|
<a href="../config/link-cow/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
link-cow
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
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|
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</a>
|
|
</li>
|
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<li class="md-nav__item">
|
|
<a href="../config/fuse-msg-size/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
fuse-msg-size
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
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</a>
|
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</li>
|
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|
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|
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<li class="md-nav__item">
|
|
<a href="../config/follow-symlinks/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
follow-symlinks
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
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|
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</a>
|
|
</li>
|
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<li class="md-nav__item">
|
|
<a href="../config/link-exdev/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
link-exdev
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
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<li class="md-nav__item">
|
|
<a href="../config/rename-exdev/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
rename-exdev
|
|
|
|
|
|
|
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</span>
|
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|
|
|
|
|
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</a>
|
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</li>
|
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<li class="md-nav__item">
|
|
<a href="../config/symlinkify/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
symlinkify
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
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<li class="md-nav__item">
|
|
<a href="../config/nullrw/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
nullrw
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
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</a>
|
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</li>
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<li class="md-nav__item">
|
|
<a href="../config/xattr/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
xattr
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
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</li>
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<li class="md-nav__item">
|
|
<a href="../config/nfsopenhack/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
nfsopenhack
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
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|
|
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|
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|
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|
|
<li class="md-nav__item">
|
|
<a href="../config/statfs/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
statfs / statvfs
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
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<li class="md-nav__item">
|
|
<a href="../config/flush-on-close/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
flush-on-close
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
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</a>
|
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</li>
|
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|
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|
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|
|
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|
|
<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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|
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|
|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../config/kernel-permissions-check/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
kernel-permissions-check
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
|
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|
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|
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|
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|
|
|
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|
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|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../config/lazy-umount-mountpoint/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
lazy-umount-mountpoint
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
</ul>
|
|
</nav>
|
|
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../error_handling_and_logging/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
Error Handling and Logging
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
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|
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|
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|
|
|
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|
|
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|
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<li class="md-nav__item">
|
|
<a href="../resource_usage/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
Resource Usage
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
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|
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|
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|
|
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|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../runtime_interface/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
Runtime Interface
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
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<li class="md-nav__item">
|
|
<a href="../remote_filesystems/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
Remote Filesystems
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
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<li class="md-nav__item">
|
|
<a href="../tips_notes/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
Tips and Notes
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
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|
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<li class="md-nav__item">
|
|
<a href="../known_issues_bugs/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
Known Issues and Bugs
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
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<article class="md-content__inner md-typeset">
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<svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-file-pen" viewBox="0 0 24 24"><path d="M12.659 22H18a2 2 0 0 0 2-2V8a2.4 2.4 0 0 0-.706-1.706l-3.588-3.588A2.4 2.4 0 0 0 14 2H6a2 2 0 0 0-2 2v9.34"/><path d="M14 2v5a1 1 0 0 0 1 1h5M10.378 12.622a1 1 0 0 1 3 3.003L8.36 20.637a2 2 0 0 1-.854.506l-2.867.837a.5.5 0 0 1-.62-.62l.836-2.869a2 2 0 0 1 .506-.853z"/></svg>
|
|
</a>
|
|
|
|
|
|
|
|
|
|
|
|
<a href="https://github.com/trapexit/mergerfs/raw/master/mkdocs/docs/tooling.md" title="View source of this page" class="md-content__button md-icon">
|
|
|
|
<svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-file-code-2" viewBox="0 0 24 24"><path d="M4 12.15V4a2 2 0 0 1 2-2h8a2.4 2.4 0 0 1 1.706.706l3.588 3.588A2.4 2.4 0 0 1 20 8v12a2 2 0 0 1-2 2h-3.35"/><path d="M14 2v5a1 1 0 0 0 1 1h5M5 16l-3 3 3 3M9 22l3-3-3-3"/></svg>
|
|
</a>
|
|
|
|
|
|
|
|
<h1 id="tooling">Tooling</h1>
|
|
<h2 id="mergerfscollect-info">mergerfs.collect-info</h2>
|
|
<p>A tool included in recent releases of <code>mergerfs</code> which collects
|
|
details about your system and configuration to help providing
|
|
<a href="../support/">support</a>.</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.collect-info
|
|
</span><span id="__span-0-2"><a id="__codelineno-0-2" name="__codelineno-0-2" href="#__codelineno-0-2"></a>* Please have mergerfs mounted before running this tool.
|
|
</span><span id="__span-0-3"><a id="__codelineno-0-3" name="__codelineno-0-3" href="#__codelineno-0-3"></a>* Upload the following file to your GitHub ticket or put on https://pastebin.com when requesting support.
|
|
</span><span id="__span-0-4"><a id="__codelineno-0-4" name="__codelineno-0-4" href="#__codelineno-0-4"></a>* /tmp/mergerfs.info.txt
|
|
</span></code></pre></div>
|
|
<h2 id="fsckmergerfs">fsck.mergerfs</h2>
|
|
<p>A tool to help diagnose and solve mergerfs pool issues. Primarily
|
|
related to mismatched permissions and ownership.</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>$ fsck.mergerfs --help
|
|
</span><span id="__span-1-2"><a id="__codelineno-1-2" name="__codelineno-1-2" href="#__codelineno-1-2"></a>fsck.mergerfs: A tool to help diagnose and solve mergerfs pool issues
|
|
</span><span id="__span-1-3"><a id="__codelineno-1-3" name="__codelineno-1-3" href="#__codelineno-1-3"></a>
|
|
</span><span id="__span-1-4"><a id="__codelineno-1-4" name="__codelineno-1-4" href="#__codelineno-1-4"></a>
|
|
</span><span id="__span-1-5"><a id="__codelineno-1-5" name="__codelineno-1-5" href="#__codelineno-1-5"></a>USAGE: fsck.mergerfs [OPTIONS] path
|
|
</span><span id="__span-1-6"><a id="__codelineno-1-6" name="__codelineno-1-6" href="#__codelineno-1-6"></a>
|
|
</span><span id="__span-1-7"><a id="__codelineno-1-7" name="__codelineno-1-7" href="#__codelineno-1-7"></a>
|
|
</span><span id="__span-1-8"><a id="__codelineno-1-8" name="__codelineno-1-8" href="#__codelineno-1-8"></a>POSITIONALS:
|
|
</span><span id="__span-1-9"><a id="__codelineno-1-9" name="__codelineno-1-9" href="#__codelineno-1-9"></a> path TEXT:DIR REQUIRED mergerfs path
|
|
</span><span id="__span-1-10"><a id="__codelineno-1-10" name="__codelineno-1-10" href="#__codelineno-1-10"></a>
|
|
</span><span id="__span-1-11"><a id="__codelineno-1-11" name="__codelineno-1-11" href="#__codelineno-1-11"></a>OPTIONS:
|
|
</span><span id="__span-1-12"><a id="__codelineno-1-12" name="__codelineno-1-12" href="#__codelineno-1-12"></a> -h, --help Print this help message and exit
|
|
</span><span id="__span-1-13"><a id="__codelineno-1-13" name="__codelineno-1-13" href="#__codelineno-1-13"></a> --fix TEXT:{none,manual,newest,largest} [none]
|
|
</span><span id="__span-1-14"><a id="__codelineno-1-14" name="__codelineno-1-14" href="#__codelineno-1-14"></a> Will attempt to 'fix' the problem by chown+chmod or copying files
|
|
</span><span id="__span-1-15"><a id="__codelineno-1-15" name="__codelineno-1-15" href="#__codelineno-1-15"></a> based on a selected file.
|
|
</span><span id="__span-1-16"><a id="__codelineno-1-16" name="__codelineno-1-16" href="#__codelineno-1-16"></a> * none: Do nothing. Just print details.
|
|
</span><span id="__span-1-17"><a id="__codelineno-1-17" name="__codelineno-1-17" href="#__codelineno-1-17"></a> * manual: User selects source file.
|
|
</span><span id="__span-1-18"><a id="__codelineno-1-18" name="__codelineno-1-18" href="#__codelineno-1-18"></a> * newest: Use file with most recent mtime.
|
|
</span><span id="__span-1-19"><a id="__codelineno-1-19" name="__codelineno-1-19" href="#__codelineno-1-19"></a> * largest: Use file with largest size.
|
|
</span><span id="__span-1-20"><a id="__codelineno-1-20" name="__codelineno-1-20" href="#__codelineno-1-20"></a> --check-size BOOLEAN [false]
|
|
</span><span id="__span-1-21"><a id="__codelineno-1-21" name="__codelineno-1-21" href="#__codelineno-1-21"></a> Considers file size in calculating differences
|
|
</span><span id="__span-1-22"><a id="__codelineno-1-22" name="__codelineno-1-22" href="#__codelineno-1-22"></a> --copy-file BOOLEAN [false]
|
|
</span><span id="__span-1-23"><a id="__codelineno-1-23" name="__codelineno-1-23" href="#__codelineno-1-23"></a> Copy file rather than chown/chmod to fix
|
|
</span></code></pre></div>
|
|
<h2 id="preloadso">preload.so</h2>
|
|
<p>EXPERIMENTAL</p>
|
|
<p>For some time there has been work to enable IO
|
|
<a href="../config/passthrough/">passthrough</a> in FUSE. IO Passthrough would
|
|
allow for near native performance with regards to reads and writes (at
|
|
the expense of certain mergerfs features.) In Linux v6.9 that feature
|
|
made its way into the kernel however in a somewhat limited form which
|
|
is incompatible with aspects of how mergerfs functions and took longer
|
|
to implement as a result. This preloadable library was created as an
|
|
alternative to the FUSE <a href="../config/passthrough/">passthrough</a>
|
|
integration.</p>
|
|
<p><code>/usr/lib/mergerfs/preload.so</code></p>
|
|
<p>This <a href="https://man7.org/linux/man-pages/man8/ld.so.8.html#ENVIRONMENT">preloadable
|
|
library</a>
|
|
overrides the creation and opening of files in order to simulate
|
|
passthrough file IO. It catches the open/creat/fopen calls, has
|
|
mergerfs do the call, queries mergerfs for the branch the file exists
|
|
on, reopens the file on the underlying filesystem and returns that
|
|
instead. Meaning that you will get native read/write performance
|
|
because mergerfs is no longer part of the workflow. Keep in mind that
|
|
this also means certain mergerfs features that work by interrupting
|
|
the read/write workflow, such as
|
|
<a href="../config/moveonenospc/">moveonenospc</a>, will no longer work.</p>
|
|
<p>Also, understand that this will only work on dynamically linked
|
|
software (that is dynamically linked with the same general libc version
|
|
as the software being used with it.) Anything statically compiled will
|
|
not work. Many GoLang and Rust apps are statically compiled.</p>
|
|
<p>The library will not interfere with non-mergerfs filesystems. The
|
|
library is written to always fallback to returning the mergerfs opened
|
|
file on error.</p>
|
|
<p>While the library was written to account for a number of edge cases
|
|
there could be some yet unaccounted for so please report any oddities.</p>
|
|
<p>Thank you to
|
|
<a href="https://github.com/nohajc/mergerfs-io-passthrough">nohajc</a> for
|
|
prototyping the idea.</p>
|
|
<h3 id="casual-usage">casual usage</h3>
|
|
<div class="language-sh highlight"><pre><span></span><code><span id="__span-2-1"><a id="__codelineno-2-1" name="__codelineno-2-1" href="#__codelineno-2-1"></a><span class="nv">LD_PRELOAD</span><span class="o">=</span>/usr/lib/mergerfs/preload.so<span class="w"> </span>touch<span class="w"> </span>/mnt/mergerfs/filename
|
|
</span></code></pre></div>
|
|
<p>Or run <code>export LD_PRELOAD=/usr/lib/mergerfs/preload.so</code> in your shell
|
|
or place it in your shell config file to have it be picked up by all
|
|
software ran from your shell. For instance, in <code>bash</code>, add the export
|
|
to <code>.bashrc</code>.</p>
|
|
<h3 id="docker-and-podman-usage">Docker and Podman usage</h3>
|
|
<p>Assume <code>/mnt/fs0</code> and <code>/mnt/fs1</code> are pooled with mergerfs at <code>/media</code>.</p>
|
|
<p>All mergerfs branch paths <em>must</em> be bind mounted into the container at
|
|
the same path as found on the host so the preload library can see
|
|
them.</p>
|
|
<p><strong>NOTE:</strong> Since a container can have its own OS setup there is no
|
|
guarantee that <code>preload.so</code> from the host install will be compatible
|
|
with the loader found in the container. If that is true it simply
|
|
won't work and shouldn't cause any issues.</p>
|
|
<div class="language-sh highlight"><pre><span></span><code><span id="__span-3-1"><a id="__codelineno-3-1" name="__codelineno-3-1" href="#__codelineno-3-1"></a>docker<span class="w"> </span>run<span class="w"> </span><span class="se">\</span>
|
|
</span><span id="__span-3-2"><a id="__codelineno-3-2" name="__codelineno-3-2" href="#__codelineno-3-2"></a><span class="w"> </span>-e<span class="w"> </span><span class="nv">LD_PRELOAD</span><span class="o">=</span>/usr/lib/mergerfs/preload.so<span class="w"> </span><span class="se">\</span>
|
|
</span><span id="__span-3-3"><a id="__codelineno-3-3" name="__codelineno-3-3" href="#__codelineno-3-3"></a><span class="w"> </span>-v<span class="w"> </span>/usr/lib/mergerfs/preload.so:/usr/lib/mergerfs/preload.so:ro<span class="w"> </span><span class="se">\</span>
|
|
</span><span id="__span-3-4"><a id="__codelineno-3-4" name="__codelineno-3-4" href="#__codelineno-3-4"></a><span class="w"> </span>-v<span class="w"> </span>/media:/media<span class="w"> </span><span class="se">\</span>
|
|
</span><span id="__span-3-5"><a id="__codelineno-3-5" name="__codelineno-3-5" href="#__codelineno-3-5"></a><span class="w"> </span>-v<span class="w"> </span>/mnt:/mnt<span class="w"> </span><span class="se">\</span>
|
|
</span><span id="__span-3-6"><a id="__codelineno-3-6" name="__codelineno-3-6" href="#__codelineno-3-6"></a><span class="w"> </span>ubuntu:latest<span class="w"> </span><span class="se">\</span>
|
|
</span><span id="__span-3-7"><a id="__codelineno-3-7" name="__codelineno-3-7" href="#__codelineno-3-7"></a><span class="w"> </span>bash
|
|
</span></code></pre></div>
|
|
<p>or more explicitly</p>
|
|
<div class="language-sh highlight"><pre><span></span><code><span id="__span-4-1"><a id="__codelineno-4-1" name="__codelineno-4-1" href="#__codelineno-4-1"></a>docker<span class="w"> </span>run<span class="w"> </span><span class="se">\</span>
|
|
</span><span id="__span-4-2"><a id="__codelineno-4-2" name="__codelineno-4-2" href="#__codelineno-4-2"></a><span class="w"> </span>-e<span class="w"> </span><span class="nv">LD_PRELOAD</span><span class="o">=</span>/usr/lib/mergerfs/preload.so<span class="w"> </span><span class="se">\</span>
|
|
</span><span id="__span-4-3"><a id="__codelineno-4-3" name="__codelineno-4-3" href="#__codelineno-4-3"></a><span class="w"> </span>-v<span class="w"> </span>/usr/lib/mergerfs/preload.so:/usr/lib/mergerfs/preload.so:ro<span class="w"> </span><span class="se">\</span>
|
|
</span><span id="__span-4-4"><a id="__codelineno-4-4" name="__codelineno-4-4" href="#__codelineno-4-4"></a><span class="w"> </span>-v<span class="w"> </span>/media:/media<span class="w"> </span><span class="se">\</span>
|
|
</span><span id="__span-4-5"><a id="__codelineno-4-5" name="__codelineno-4-5" href="#__codelineno-4-5"></a><span class="w"> </span>-v<span class="w"> </span>/mnt/fs0:/mnt/fs0<span class="w"> </span><span class="se">\</span>
|
|
</span><span id="__span-4-6"><a id="__codelineno-4-6" name="__codelineno-4-6" href="#__codelineno-4-6"></a><span class="w"> </span>-v<span class="w"> </span>/mnt/fs1:/mnt/fs1<span class="w"> </span><span class="se">\</span>
|
|
</span><span id="__span-4-7"><a id="__codelineno-4-7" name="__codelineno-4-7" href="#__codelineno-4-7"></a><span class="w"> </span>ubuntu:latest<span class="w"> </span><span class="se">\</span>
|
|
</span><span id="__span-4-8"><a id="__codelineno-4-8" name="__codelineno-4-8" href="#__codelineno-4-8"></a><span class="w"> </span>bash
|
|
</span></code></pre></div>
|
|
<h3 id="systemd-unit">systemd unit</h3>
|
|
<p>Use the <code>Environment</code> option to set the LD_PRELOAD variable.</p>
|
|
<ul>
|
|
<li><a href="https://www.freedesktop.org/software/systemd/man/latest/systemd.service.html#Command%20lines">https://www.freedesktop.org/software/systemd/man/latest/systemd.service.html#Command%20lines</a></li>
|
|
<li><a href="https://serverfault.com/questions/413397/how-to-set-environment-variable-in-systemd-service">https://serverfault.com/questions/413397/how-to-set-environment-variable-in-systemd-service</a></li>
|
|
</ul>
|
|
<div class="language-text highlight"><pre><span></span><code><span id="__span-5-1"><a id="__codelineno-5-1" name="__codelineno-5-1" href="#__codelineno-5-1"></a>[Service]
|
|
</span><span id="__span-5-2"><a id="__codelineno-5-2" name="__codelineno-5-2" href="#__codelineno-5-2"></a>Environment=LD_PRELOAD=/usr/lib/mergerfs/preload.so
|
|
</span></code></pre></div>
|
|
<h2 id="misc">Misc</h2>
|
|
<ul>
|
|
<li>https://github.com/trapexit/mergerfs-tools<ul>
|
|
<li><strong>Keep in mind these tools are more to provide examples of custom
|
|
behaviors that can be build on top of mergerfs. They may not
|
|
have all the features you are looking for.</strong></li>
|
|
<li>mergerfs.ctl: A tool to make it easier to query and configure mergerfs at runtime</li>
|
|
<li>mergerfs.fsck: Provides permissions and ownership auditing and
|
|
the ability to fix them (should use <code>fsck.mergerfs</code> instead)</li>
|
|
<li>mergerfs.dedup: Will help identify and optionally remove duplicate files</li>
|
|
<li>mergerfs.dup: Ensure there are at least N copies of a file across the pool</li>
|
|
<li>mergerfs.balance: Rebalance files across filesystems by moving them from the most filled to the least filled</li>
|
|
<li>mergerfs.consolidate: move files within a single mergerfs directory to the filesystem with most free space</li>
|
|
</ul>
|
|
</li>
|
|
<li>https://github.com/trapexit/scorch<ul>
|
|
<li>scorch: A tool to help discover silent corruption of files and keep track of files</li>
|
|
</ul>
|
|
</li>
|
|
<li>https://github.com/trapexit/bbf<ul>
|
|
<li>bbf (bad block finder): a tool to scan for and 'fix' hard drive bad blocks and find the files using those blocks</li>
|
|
</ul>
|
|
</li>
|
|
</ul>
|
|
|
|
|
|
|
|
|
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