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| author | johannst <johannst@users.noreply.github.com> | 2023-06-21 21:15:05 +0000 |
|---|---|---|
| committer | johannst <johannst@users.noreply.github.com> | 2023-06-21 21:15:05 +0000 |
| commit | a85e47072ff808846242da49295b4b73af23b840 (patch) | |
| tree | 82a9adba0c179a7c47b7ab7f59a7d121adcad8b5 /linux/zfs.html | |
| parent | eaad036407c9546be0de27f61745fef4b6856e56 (diff) | |
| download | notes-a85e47072ff808846242da49295b4b73af23b840.tar.gz notes-a85e47072ff808846242da49295b4b73af23b840.zip | |
deploy: 35dc3c48a50594148554010ac626480161ad357a
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| -rw-r--r-- | linux/zfs.html | 416 |
1 files changed, 416 insertions, 0 deletions
diff --git a/linux/zfs.html b/linux/zfs.html new file mode 100644 index 0000000..78e2847 --- /dev/null +++ b/linux/zfs.html @@ -0,0 +1,416 @@ +<!DOCTYPE HTML> +<html lang="en" class="sidebar-visible no-js light"> + <head> + <!-- Book generated using mdBook --> + <meta charset="UTF-8"> + <title>zfs - Notes</title> + + + <!-- Custom HTML head --> + + <meta name="description" content=""> + <meta name="viewport" content="width=device-width, initial-scale=1"> + <meta name="theme-color" content="#ffffff" /> + + <link rel="icon" href="../favicon.svg"> + <link rel="shortcut icon" href="../favicon.png"> + <link rel="stylesheet" href="../css/variables.css"> + <link rel="stylesheet" href="../css/general.css"> + <link rel="stylesheet" href="../css/chrome.css"> + <link rel="stylesheet" href="../css/print.css" media="print"> + + <!-- Fonts --> + <link rel="stylesheet" href="../FontAwesome/css/font-awesome.css"> + <link rel="stylesheet" href="../fonts/fonts.css"> + + <!-- Highlight.js Stylesheets --> + <link rel="stylesheet" href="../highlight.css"> + <link rel="stylesheet" href="../tomorrow-night.css"> + <link rel="stylesheet" href="../ayu-highlight.css"> + + <!-- Custom theme stylesheets --> + + </head> + <body> + <div id="body-container"> + <!-- Provide site root to javascript --> + <script> + var path_to_root = "../"; + var default_theme = window.matchMedia("(prefers-color-scheme: dark)").matches ? "navy" : "light"; + </script> + + <!-- Work around some values being stored in localStorage wrapped in quotes --> + <script> + try { + var theme = localStorage.getItem('mdbook-theme'); + var sidebar = localStorage.getItem('mdbook-sidebar'); + + if (theme.startsWith('"') && theme.endsWith('"')) { + localStorage.setItem('mdbook-theme', theme.slice(1, theme.length - 1)); + } + + if (sidebar.startsWith('"') && sidebar.endsWith('"')) { + localStorage.setItem('mdbook-sidebar', sidebar.slice(1, sidebar.length - 1)); + } + } catch (e) { } + </script> + + <!-- Set the theme before any content is loaded, prevents flash --> + <script> + var theme; + try { theme = localStorage.getItem('mdbook-theme'); } catch(e) { } + if (theme === null || theme === undefined) { theme = default_theme; } + var html = document.querySelector('html'); + html.classList.remove('no-js') + html.classList.remove('light') + html.classList.add(theme); + html.classList.add('js'); + </script> + + <!-- Hide / unhide sidebar before it is displayed --> + <script> + var html = document.querySelector('html'); + var sidebar = null; + if (document.body.clientWidth >= 1080) { + try { sidebar = localStorage.getItem('mdbook-sidebar'); } catch(e) { } + sidebar = sidebar || 'visible'; + } else { + sidebar = 'hidden'; + } + html.classList.remove('sidebar-visible'); + html.classList.add("sidebar-" + sidebar); + </script> + + <nav id="sidebar" class="sidebar" aria-label="Table of contents"> + <div class="sidebar-scrollbox"> + <ol class="chapter"><li class="chapter-item expanded affix "><a href="../intro.html">Introduction</a></li><li class="chapter-item expanded "><a href="../tools/index.html"><strong aria-hidden="true">1.</strong> Tools</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../tools/zsh.html"><strong aria-hidden="true">1.1.</strong> zsh</a></li><li class="chapter-item expanded "><a href="../tools/bash.html"><strong aria-hidden="true">1.2.</strong> bash</a></li><li class="chapter-item expanded "><a href="../tools/fish.html"><strong aria-hidden="true">1.3.</strong> fish</a></li><li class="chapter-item expanded "><a href="../tools/tmux.html"><strong aria-hidden="true">1.4.</strong> tmux</a></li><li class="chapter-item expanded "><a href="../tools/git.html"><strong aria-hidden="true">1.5.</strong> git</a></li><li class="chapter-item expanded "><a href="../tools/awk.html"><strong aria-hidden="true">1.6.</strong> awk</a></li><li class="chapter-item expanded "><a href="../tools/emacs.html"><strong aria-hidden="true">1.7.</strong> emacs</a></li><li class="chapter-item expanded "><a href="../tools/gpg.html"><strong aria-hidden="true">1.8.</strong> gpg</a></li><li class="chapter-item expanded "><a href="../tools/gdb.html"><strong aria-hidden="true">1.9.</strong> gdb</a></li><li class="chapter-item expanded "><a href="../tools/gdbserver.html"><strong aria-hidden="true">1.10.</strong> gdbserver</a></li><li class="chapter-item expanded "><a href="../tools/radare2.html"><strong aria-hidden="true">1.11.</strong> radare2</a></li><li class="chapter-item expanded "><a href="../tools/qemu.html"><strong aria-hidden="true">1.12.</strong> qemu</a></li><li class="chapter-item expanded "><a href="../tools/pacman.html"><strong aria-hidden="true">1.13.</strong> pacman</a></li><li class="chapter-item expanded "><a href="../tools/dot.html"><strong aria-hidden="true">1.14.</strong> dot</a></li></ol></li><li class="chapter-item expanded "><a href="../monitor/index.html"><strong aria-hidden="true">2.</strong> Resource analysis & monitor</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../monitor/lsof.html"><strong aria-hidden="true">2.1.</strong> lsof</a></li><li class="chapter-item expanded "><a href="../monitor/ss.html"><strong aria-hidden="true">2.2.</strong> ss</a></li><li class="chapter-item expanded "><a href="../monitor/pidstat.html"><strong aria-hidden="true">2.3.</strong> pidstat</a></li><li class="chapter-item expanded "><a href="../monitor/pgrep.html"><strong aria-hidden="true">2.4.</strong> pgrep</a></li><li class="chapter-item expanded "><a href="../monitor/pmap.html"><strong aria-hidden="true">2.5.</strong> pmap</a></li><li class="chapter-item expanded "><a href="../monitor/pstack.html"><strong aria-hidden="true">2.6.</strong> pstack</a></li></ol></li><li class="chapter-item expanded "><a href="../trace_profile/index.html"><strong aria-hidden="true">3.</strong> Trace and Profile</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../trace_profile/strace.html"><strong aria-hidden="true">3.1.</strong> strace</a></li><li class="chapter-item expanded "><a href="../trace_profile/ltrace.html"><strong aria-hidden="true">3.2.</strong> ltrace</a></li><li class="chapter-item expanded "><a href="../trace_profile/perf.html"><strong aria-hidden="true">3.3.</strong> perf</a></li><li class="chapter-item expanded "><a href="../trace_profile/oprofile.html"><strong aria-hidden="true">3.4.</strong> OProfile</a></li><li class="chapter-item expanded "><a href="../trace_profile/time.html"><strong aria-hidden="true">3.5.</strong> time</a></li></ol></li><li class="chapter-item expanded "><a href="../binary/index.html"><strong aria-hidden="true">4.</strong> Binary</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../binary/od.html"><strong aria-hidden="true">4.1.</strong> od</a></li><li class="chapter-item expanded "><a href="../binary/xxd.html"><strong aria-hidden="true">4.2.</strong> xxd</a></li><li class="chapter-item expanded "><a href="../binary/readelf.html"><strong aria-hidden="true">4.3.</strong> readelf</a></li><li class="chapter-item expanded "><a href="../binary/objdump.html"><strong aria-hidden="true">4.4.</strong> objdump</a></li><li class="chapter-item expanded "><a href="../binary/nm.html"><strong aria-hidden="true">4.5.</strong> nm</a></li></ol></li><li class="chapter-item expanded "><a href="../development/index.html"><strong aria-hidden="true">5.</strong> Development</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../development/c++filt.html"><strong aria-hidden="true">5.1.</strong> c++filt</a></li><li class="chapter-item expanded "><a href="../development/c++.html"><strong aria-hidden="true">5.2.</strong> c++</a></li><li class="chapter-item expanded "><a href="../development/glibc.html"><strong aria-hidden="true">5.3.</strong> glibc</a></li><li class="chapter-item expanded "><a href="../development/gcc.html"><strong aria-hidden="true">5.4.</strong> gcc</a></li><li class="chapter-item expanded "><a href="../development/make.html"><strong aria-hidden="true">5.5.</strong> make</a></li><li class="chapter-item expanded "><a href="../development/ld.so.html"><strong aria-hidden="true">5.6.</strong> ld.so</a></li><li class="chapter-item expanded "><a href="../development/symbolver.html"><strong aria-hidden="true">5.7.</strong> symbol versioning</a></li><li class="chapter-item expanded "><a href="../development/python.html"><strong aria-hidden="true">5.8.</strong> python</a></li><li class="chapter-item expanded "><a href="../development/gcov.html"><strong aria-hidden="true">5.9.</strong> gcov</a></li></ol></li><li class="chapter-item expanded "><a href="../linux/index.html"><strong aria-hidden="true">6.</strong> Linux</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../linux/systemd.html"><strong aria-hidden="true">6.1.</strong> systemd</a></li><li class="chapter-item expanded "><a href="../linux/coredump.html"><strong aria-hidden="true">6.2.</strong> coredump</a></li><li class="chapter-item expanded "><a href="../linux/ptrace_scope.html"><strong aria-hidden="true">6.3.</strong> ptrace_scope</a></li><li class="chapter-item expanded "><a href="../linux/cryptsetup.html"><strong aria-hidden="true">6.4.</strong> cryptsetup</a></li><li class="chapter-item expanded "><a href="../linux/swap.html"><strong aria-hidden="true">6.5.</strong> swap</a></li><li class="chapter-item expanded "><a href="../linux/input.html"><strong aria-hidden="true">6.6.</strong> input</a></li><li class="chapter-item expanded "><a href="../linux/acl.html"><strong aria-hidden="true">6.7.</strong> acl</a></li><li class="chapter-item expanded "><a href="../linux/zfs.html" class="active"><strong aria-hidden="true">6.8.</strong> zfs</a></li></ol></li><li class="chapter-item expanded "><a href="../network/index.html"><strong aria-hidden="true">7.</strong> Network</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../network/tcpdump.html"><strong aria-hidden="true">7.1.</strong> tcpdump</a></li><li class="chapter-item expanded "><a href="../network/firewall-cmd.html"><strong aria-hidden="true">7.2.</strong> firewall-cmd</a></li><li class="chapter-item expanded "><a href="../network/nftables.html"><strong aria-hidden="true">7.3.</strong> nftables</a></li></ol></li><li class="chapter-item expanded "><a href="../web/index.html"><strong aria-hidden="true">8.</strong> Web</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../web/html.html"><strong aria-hidden="true">8.1.</strong> html</a></li><li class="chapter-item expanded "><a href="../web/chartjs.html"><strong aria-hidden="true">8.2.</strong> chartjs</a></li></ol></li><li class="chapter-item expanded "><a href="../arch/index.html"><strong aria-hidden="true">9.</strong> Arch</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../arch/x86_64.html"><strong aria-hidden="true">9.1.</strong> x86_64</a></li><li class="chapter-item expanded "><a href="../arch/arm64.html"><strong aria-hidden="true">9.2.</strong> arm64</a></li><li class="chapter-item expanded "><a href="../arch/armv7.html"><strong aria-hidden="true">9.3.</strong> armv7</a></li><li class="chapter-item expanded "><a href="../arch/riscv.html"><strong aria-hidden="true">9.4.</strong> riscv</a></li></ol></li></ol> + </div> + <div id="sidebar-resize-handle" class="sidebar-resize-handle"></div> + </nav> + + <div id="page-wrapper" class="page-wrapper"> + + <div class="page"> + <div id="menu-bar-hover-placeholder"></div> + <div id="menu-bar" class="menu-bar sticky bordered"> + <div class="left-buttons"> + <button id="sidebar-toggle" class="icon-button" type="button" title="Toggle Table of Contents" aria-label="Toggle Table of Contents" aria-controls="sidebar"> + <i class="fa fa-bars"></i> + </button> + <button id="theme-toggle" class="icon-button" type="button" title="Change theme" aria-label="Change theme" aria-haspopup="true" aria-expanded="false" aria-controls="theme-list"> + <i class="fa fa-paint-brush"></i> + </button> + <ul id="theme-list" class="theme-popup" aria-label="Themes" role="menu"> + <li role="none"><button role="menuitem" class="theme" id="light">Light</button></li> + <li role="none"><button role="menuitem" class="theme" 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(Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar"> + <i class="fa fa-search"></i> + </button> + </div> + + <h1 class="menu-title">Notes</h1> + + <div class="right-buttons"> + <a href="../print.html" title="Print this book" aria-label="Print this book"> + <i id="print-button" class="fa fa-print"></i> + </a> + <a href="https://github.com/johannst/notes" title="Git repository" aria-label="Git repository"> + <i id="git-repository-button" class="fa fa-github"></i> + </a> + + </div> + </div> + + <div id="search-wrapper" class="hidden"> + <form id="searchbar-outer" class="searchbar-outer"> + <input type="search" id="searchbar" name="searchbar" placeholder="Search this book ..." aria-controls="searchresults-outer" aria-describedby="searchresults-header"> + </form> + <div id="searchresults-outer" class="searchresults-outer hidden"> + <div id="searchresults-header" class="searchresults-header"></div> + <ul id="searchresults"> + </ul> + </div> + </div> + + <!-- Apply ARIA attributes after the sidebar and the sidebar toggle button are added to the DOM --> + <script> + document.getElementById('sidebar-toggle').setAttribute('aria-expanded', sidebar === 'visible'); + document.getElementById('sidebar').setAttribute('aria-hidden', sidebar !== 'visible'); + Array.from(document.querySelectorAll('#sidebar a')).forEach(function(link) { + link.setAttribute('tabIndex', sidebar === 'visible' ? 0 : -1); + }); + </script> + + <div id="content" class="content"> + <main> + <h1 id="zfs"><a class="header" href="#zfs">zfs</a></h1> +<p>Pools are managed with the <a href="https://openzfs.github.io/openzfs-docs/man/8/zpool.8.html"><code>zpool(8)</code></a> command and have the +following hierarchy:</p> +<ul> +<li><code>pool</code>: consists of one or more virtual devices (<code>vdev</code>)</li> +<li><code>vdev</code>: consists of one or more physical devices (<code>dev</code>) and come in +different kinds such as <a href="https://openzfs.github.io/openzfs-docs/man/7/zpoolconcepts.7.html#Virtual_Devices_(vdevs)"><code>disk</code>, <code>mirror</code>, <code>raidzX</code>, ...</a> +<ul> +<li><code>disk</code>: single physical disk (<code>vdev == dev</code>)</li> +<li><code>mirror</code>: data is identically replicated on all <code>devs</code> (requires at least 2 +physical devices).</li> +</ul> +</li> +</ul> +<p>Data stored in a pool is distributed and stored across all <code>vdevs</code> by zfs. +Therefore a total failure of a single <code>vdev</code> can lead to total loss of a pool.</p> +<p>A <code>dataset</code> is a logical volume which can be created on top of a <code>pool</code>. Each +<code>dataset</code> can be configured with its own set of <code>properties</code> like +<a href="https://openzfs.github.io/openzfs-docs/man/7/zfsprops.7.html"><code>encryption</code>, <code>quota</code>, ...</a>. +Datasets are managed with the <a href="https://openzfs.github.io/openzfs-docs/man/8/zfs.8.html"><code>zfs(8)</code></a> command.</p> +<h2 id="zfs-pool-management"><a class="header" href="#zfs-pool-management">zfs pool management</a></h2> +<p>Pools are by default mounted at <code>/<POOL></code>.</p> +<h3 id="create-modify-and-destroy-zfs-pools"><a class="header" href="#create-modify-and-destroy-zfs-pools">Create, modify and destroy zfs pools</a></h3> +<pre><code class="language-bash"># Create a pool MOOSE with a two mirror vdevs. +zpool create moose mirror <dev1> <dev2> mirror <dev3> <dev4>.. + +# Add new raidz1 vdev to a pool. +zpool add moose raidz1 <devA> <devB> <devC>.. + +# Remove a vdev from a pool. +zpool remove moose <vdevX> + +# Destroy a pool. +zpool destroy moose +</code></pre> +<blockquote> +<p>For stable device names in small home setups it is recommended to use names +from <a href="https://openzfs.github.io/openzfs-docs/Project%20and%20Community/FAQ.html#selecting-dev-names-when-creating-a-pool-linux"><code>/dev/disk/by-id</code></a>.</p> +</blockquote> +<h3 id="inspect-zfs-pools"><a class="header" href="#inspect-zfs-pools">Inspect zfs pools</a></h3> +<pre><code class="language-bash"># Show status of all pools or a single one. +zpool status [<pool>] + +# Show information / statistics about pools or single one. +zpool list [<pool>] + +# Show statistics for all devices. +zpool list -v + +# Show command history for pools. +zpool history +</code></pre> +<h3 id="modify-vdevs"><a class="header" href="#modify-vdevs">Modify <code>vdevs</code></a></h3> +<pre><code class="language-bash"># vdev MIRROR-0 with two devs. +zpool status + NAME STATE READ WRITE CKSUM + moose ONLINE 0 0 0 + mirror-0 ONLINE 0 0 0 + virtio-200 ONLINE 0 0 0 + virtio-300 ONLINE 0 0 0 + +# Attach new device to an existing vdev. +zpool attach moose virtio-200 virtio-400 + +# vdev MIRROR-0 with three devs. +zpool status + NAME STATE READ WRITE CKSUM + moose ONLINE 0 0 0 + mirror-0 ONLINE 0 0 0 + virtio-200 ONLINE 0 0 0 + virtio-300 ONLINE 0 0 0 + virtio-400 ONLINE 0 0 0 + +# Detach device from vdev. +zpool detach moose virtio-200 +</code></pre> +<h3 id="replace-faulty-disk"><a class="header" href="#replace-faulty-disk">Replace faulty disk</a></h3> +<pre><code class="language-bash"># MIRROR-0 is degraded as one disk failed, but still intact. +zpool status + NAME STATE READ WRITE CKSUM + moose DEGRADED 0 0 0 + mirror-0 DEGRADED 0 0 0 + virtio-200 UNAVAIL 0 0 0 invalid label + virtio-300 ONLINE 0 0 0 + +# Replace faulty disk, in mirror. +# No data is lost since mirror still has one good disk. +zpool replace moose virtio-200 virtio-400 + +# MIRROR-0 back in ONLINE (good) state. +zpool status + NAME STATE READ WRITE CKSUM + moose ONLINE 0 0 0 + mirror-0 ONLINE 0 0 0 + virtio-400 ONLINE 0 0 0 + virtio-300 ONLINE 0 0 0 +</code></pre> +<h3 id="import-or-export-zfs-pools"><a class="header" href="#import-or-export-zfs-pools">Import or export zfs pools</a></h3> +<p>When moving pools between hosts, the pool must be <code>exported</code> on the currently +active host and <code>imported</code> on the new host.</p> +<pre><code class="language-bash"># Export a pool called MOOSE. +zpool export moose + +# List pools that can be imported using BY-ID deivce names (for example). +zpool import -d /dev/disk/by-id + +# Import pool MOOSE using BY-ID device names (for example). +zpool import -d /dev/disk/by-id moose +</code></pre> +<blockquote> +<p>Device names used by an existing pool can be changed by <a href="https://openzfs.github.io/openzfs-docs/Project%20and%20Community/FAQ.html#changing-dev-names-on-an-existing-pool">exporting and +importing</a> a pool again.</p> +</blockquote> +<h2 id="zfs-dataset-management"><a class="header" href="#zfs-dataset-management">zfs dataset management</a></h2> +<p>Datasets are by default mounted at <code>/<POOL>/<DATASET></code>.</p> +<h3 id="create-and-destroy-zfs-datasets"><a class="header" href="#create-and-destroy-zfs-datasets">Create and destroy zfs datasets</a></h3> +<pre><code class="language-bash"># Create dataset FOO on pool MOOSE. +zfs create moose/foo + +# Destroy dataset. +zfs destroy moose/foo +</code></pre> +<h3 id="list-all-zfs-datasets"><a class="header" href="#list-all-zfs-datasets">List all zfs datasets</a></h3> +<pre><code class="language-bash"># List all zfs datasets. +zfs list +</code></pre> +<h3 id="mount-zfs-datasets"><a class="header" href="#mount-zfs-datasets">Mount zfs datasets</a></h3> +<pre><code class="language-bash"># List currently mounted datasets. +zfs mount + +# Mount dataset. +zfs mount moose/foo + +# Unmount dataset. +zfs unmount moose/foo +</code></pre> +<h3 id="encrypted-datasets"><a class="header" href="#encrypted-datasets">Encrypted datasets</a></h3> +<p>Encryption is a readonly property, can only be set when creating a dataset.</p> +<pre><code class="language-bash"># Create encrypted dataset ENC on pool MOOSE. +zfs create -o encryption=on -o keyformat=passphrase moose/foo + +# Mount encrypte dataset (if key is not loaded). +zfs mount -l moose/foo + +# Unmount dataset and unload encryption key (unload is optional). +zfs umount -u moose/foo +</code></pre> +<h3 id="manage-zfs-encryption-keys"><a class="header" href="#manage-zfs-encryption-keys">Manage zfs encryption keys</a></h3> +<pre><code class="language-bash"># Preload encryption key for dataset. +zfs load-key moose/foo + +# Preload encryption key for all datasets. +zfs load-key -a + +# Change encryption key for dataset. +zfs change-key moose/foo + +# Unload encryption key for dataset. +zfs unload-key moose/foo +</code></pre> +<h3 id="manage-dataset-properties"><a class="header" href="#manage-dataset-properties">Manage dataset properties</a></h3> +<pre><code class="language-bash"># Get all properties for dataset. +zfs get quota moose/foo + +# Get single property for dataset. +zfs get all moose/foo + +# Get single property for all datasets. +zfs get quota + +# Set property on dataset. +zfs set quota=10G moose/foo +</code></pre> +<h3 id="snapshots"><a class="header" href="#snapshots">Snapshots</a></h3> +<pre><code class="language-bash"># Create snapshot called V2 for dataset moose/foo. +zfs snapshot moose/foo@v2 + +# List all snapshots. +zfs list -t snapshot + +# Make .zfs direcotry visible in the root of the dataset. +zfs set snapdir=visible moose/foo + +# Browse available snapshots in visible .zfs direcotry (readonly). +ls /moose/foo/.zfs/snapshot +v1/ v2/ + +# Create a new dataset based on the V1 snapshot +zfs clone moose/foo@v1 moose/foov1 + +# Destroy snapshot. +zfs destroy moose/foo@v1 +</code></pre> +<h3 id="access-control-list"><a class="header" href="#access-control-list">Access control list</a></h3> +<p>Focus on <a href="./acl.html">posix acl</a>.</p> +<pre><code class="language-bash"># Set the ACL type for the FOO dataset to POSIXACL. +zfs set acltype=posixacl moose/foo + +# Get the ACL type of a given dataset. +zfs get acltype moose/foo +</code></pre> +<blockquote> +<p>For performance reasons it is recommended to also set <code>zfs set xattr=sa moose/foo</code> [<a href="https://github.com/openzfs/zfs/issues/170#issuecomment-27348094">ref</a>].</p> +</blockquote> +<h2 id="example-zfs-pool-import-during-startup-systemd"><a class="header" href="#example-zfs-pool-import-during-startup-systemd">Example: zfs pool import during startup (<code>systemd</code>)</a></h2> +<p>The default zpool cache file is <code>/etc/zfs/zpool.cache</code>. When pools are imported +the cache is updated.</p> +<p>Enable the following targets / services to automatically import pools from the +cache.</p> +<pre><code class="language-bash">systemctl list-dependencies + ... + └─zfs.target + └─zfs-import.target + └─zfs-import-cache.service +</code></pre> + + </main> + + <nav class="nav-wrapper" aria-label="Page navigation"> + <!-- Mobile navigation buttons --> + <a rel="prev" href="../linux/acl.html" class="mobile-nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left"> + <i class="fa fa-angle-left"></i> + </a> + + <a rel="next" href="../network/index.html" class="mobile-nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right"> + <i class="fa fa-angle-right"></i> + </a> + + <div style="clear: both"></div> + </nav> + </div> + </div> + + <nav class="nav-wide-wrapper" aria-label="Page navigation"> + <a rel="prev" href="../linux/acl.html" class="nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left"> + <i class="fa fa-angle-left"></i> + </a> + + <a rel="next" href="../network/index.html" class="nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right"> + <i class="fa fa-angle-right"></i> + </a> + </nav> + + </div> + + + + + <script> + window.playground_copyable = true; + </script> + + + <script src="../elasticlunr.min.js"></script> + <script src="../mark.min.js"></script> + <script src="../searcher.js"></script> + + <script src="../clipboard.min.js"></script> + <script src="../highlight.js"></script> + <script src="../book.js"></script> + + <!-- Custom JS scripts --> + + + </div> + </body> +</html> |