<html dir="ltr"><head></head><body style="text-align:left; direction:ltr;"><div>Ah. BtrFS is like LVM thinpool allocation. Allows overcommit on creation to be backfilled later with physical drive space when needed.</div><div><br></div><div>Thus the strange df output as the kernel sees various mounts all with the same size as they are all bit/block-wise COW inode collections.</div><div><br></div><div>On Wed, 2019-01-09 at 17:55 -0600, Beddingfield, Allen via Ale wrote:</div><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><pre>The "subvolumes" section on this page explains it much better than I can.</pre><pre><br></pre><a href="https://btrfs.wiki.kernel.org/index.php/SysadminGuide"><pre>https://btrfs.wiki.kernel.org/index.php/SysadminGuide</pre></a><pre><br></pre><pre><br></pre><pre>Allen B.</pre><pre><br></pre><pre>On 1/9/19 1:22 PM, Jim Kinney wrote:</pre><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><pre>So a subvolume is sortof partition-like but doesn't actually have a </pre><pre>partition boundary.</pre><pre><br></pre><pre>On Wed, 2019-01-09 at 13:15 -0600, Beddingfield, Allen wrote:</pre><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><pre>Yeah, that output is horrible. Essentially you logically define</pre><pre>whatever you want to be a "volume" for snapshot purposes. df isn't</pre><pre>smart enough to tell the difference, so it gives you that mess. It is</pre><pre>really one big "/", with subvolumes defined.</pre><pre>Allen B.</pre><pre><br></pre><pre>On 1/9/19 1:13 PM, Jim Kinney wrote:</pre><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><pre>Learned something new. Never used BtrFS. That output is rather</pre><pre>offputting! What does lsblk show?</pre><pre><br></pre><pre>On Wed, 2019-01-09 at 13:05 -0600, Beddingfield, Allen via Ale wrote:</pre><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><pre>Not actually a problem - just BtrFS subvolumes. Look in the</pre><pre>partitioning tool in yast to see the BtrFS configuration. You may also</pre><pre>want to neuter the snapshot policy, or it will eventually fill up "/"</pre><pre><br></pre><pre>On 1/9/19 1:03 PM, Jim Kinney via Ale wrote:</pre><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><pre>fun. NOT!</pre><pre><br></pre><pre>Check for disk errors and copy off anything you care about.</pre><pre><br></pre><pre>Hmm. That .snapshots folder makes me think that that partition is</pre><pre>composed (improperly) of files from a previous VM snapshot set that was</pre><pre>not collapsed before export.</pre><pre><br></pre><pre>On Wed, 2019-01-09 at 13:39 -0500, Leam Hall via Ale wrote:</pre><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><pre>Am I the only one that thinks this is weird output for "df -h"?</pre><pre><br></pre><pre>###</pre><pre><br></pre><pre>/dev/sda2 14G 2.0G 11G 16% /</pre><pre>/dev/sda2 14G 2.0G 11G 16% /opt</pre><pre>/dev/sda2 14G 2.0G 11G 16% /var/tmp</pre><pre>/dev/sda2 14G 2.0G 11G 16% /tmp</pre><pre>/dev/sda2 14G 2.0G 11G 16% /.snapshots</pre><pre>/dev/sda2 14G 2.0G 11G 16% /var/lib/mariadb</pre><pre>/dev/sda2 14G 2.0G 11G 16% /var/lib/libvirt/images</pre><pre>/dev/sda2 14G 2.0G 11G 16% /var/lib/pgsql</pre><pre>/dev/sda2 14G 2.0G 11G 16% /usr/local</pre><pre>/dev/sda2 14G 2.0G 11G 16% /var/spool</pre><pre>/dev/sda2 14G 2.0G 11G 16% /var/cache</pre><pre>/dev/sda2 14G 2.0G 11G 16% /boot/grub2/i386-pc</pre><pre>/dev/sda2 14G 2.0G 11G 16% /var/crash</pre><pre>/dev/sda2 14G 2.0G 11G 16% /srv</pre><pre>/dev/sda2 14G 2.0G 11G 16% /var/opt</pre><pre>/dev/sda2 14G 2.0G 11G 16% /var/lib/mysql</pre><pre>/dev/sda2 14G 2.0G 11G 16% /var/lib/named</pre><pre>/dev/sda2 14G 2.0G 11G 16% /var/lib/mailman</pre><pre>/dev/sda2 14G 2.0G 11G 16% /boot/grub2/x86_64-efi</pre><pre>/dev/sda2 14G 2.0G 11G 16% /home</pre><pre>/dev/sda2 14G 2.0G 11G 16% /var/log</pre><pre>/dev/sda2 14G 2.0G 11G 16% /var/lib/machines</pre><pre><br></pre><pre>_______________________________________________</pre><pre>Ale mailing list</pre><a href="mailto:Ale@ale.org"><pre>Ale@ale.org</pre></a><pre><br></pre><pre> <mailto:</pre><a href="mailto:Ale@ale.org"><pre>Ale@ale.org</pre></a><pre>></pre><pre><br></pre><pre> <mailto:</pre><a href="mailto:Ale@ale.org"><pre>Ale@ale.org</pre></a><pre><br></pre><pre> <mailto:</pre><a href="mailto:Ale@ale.org"><pre>Ale@ale.org</pre></a><pre>></pre><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><pre><br></pre></blockquote><pre><br></pre><pre> <mailto:</pre><a href="mailto:Ale@ale.org"><pre>Ale@ale.org</pre></a><pre><br></pre><pre> <mailto:</pre><a href="mailto:Ale@ale.org"><pre>Ale@ale.org</pre></a><pre>></pre><pre><br></pre><pre> <mailto:</pre><a href="mailto:Ale@ale.org"><pre>Ale@ale.org</pre></a><pre><br></pre><pre> <mailto:</pre><a href="mailto:Ale@ale.org"><pre>Ale@ale.org</pre></a><pre>></pre><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><pre><br></pre><pre><br></pre></blockquote><pre><br></pre><a href="https://mail.ale.org/mailman/listinfo/ale"><pre>https://mail.ale.org/mailman/listinfo/ale</pre></a><pre><br></pre><pre><br></pre><pre><br></pre><pre><br></pre><pre>See JOBS, ANNOUNCE and SCHOOLS lists at</pre><a href="http://mail.ale.org/mailman/listinfo"><pre>http://mail.ale.org/mailman/listinfo</pre></a><pre><br></pre><pre><br></pre><pre><br></pre><pre><br></pre></blockquote><pre>-- </pre><pre><br></pre><pre>James P. Kinney III</pre><pre><br></pre><pre>Every time you stop a school, you will have to build a jail. What you</pre><pre>gain at one end you lose at the other. It's like feeding a dog on his</pre><pre>own tail. It won't fatten the dog.</pre><pre>- Speech 11/23/1900 Mark Twain</pre><pre><br></pre><a href="http://heretothereideas.blogspot.com/"><pre>http://heretothereideas.blogspot.com/</pre></a><pre><br></pre><pre><br></pre><pre><br></pre><pre><br></pre><pre><br></pre><pre>_______________________________________________</pre><pre>Ale mailing list</pre><a href="mailto:Ale@ale.org"><pre>Ale@ale.org</pre></a><pre><br></pre><pre> <mailto:</pre><a href="mailto:Ale@ale.org"><pre>Ale@ale.org</pre></a><pre>></pre><pre><br></pre><pre> <mailto:</pre><a href="mailto:Ale@ale.org"><pre>Ale@ale.org</pre></a><pre><br></pre><pre> <mailto:</pre><a href="mailto:Ale@ale.org"><pre>Ale@ale.org</pre></a><pre>></pre><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><pre><br></pre></blockquote><pre><br></pre><a href="https://mail.ale.org/mailman/listinfo/ale"><pre>https://mail.ale.org/mailman/listinfo/ale</pre></a><pre><br></pre><pre><br></pre><pre><br></pre><pre>See JOBS, ANNOUNCE and SCHOOLS lists at</pre><a href="http://mail.ale.org/mailman/listinfo"><pre>http://mail.ale.org/mailman/listinfo</pre></a><pre><br></pre><pre><br></pre><pre><br></pre><pre><br></pre></blockquote><pre><br></pre></blockquote><pre>-- </pre><pre><br></pre><pre>James P. Kinney III</pre><pre><br></pre><pre>Every time you stop a school, you will have to build a jail. What you</pre><pre>gain at one end you lose at the other. It's like feeding a dog on his</pre><pre>own tail. It won't fatten the dog.</pre><pre>- Speech 11/23/1900 Mark Twain</pre><pre><br></pre><a href="http://heretothereideas.blogspot.com/"><pre>http://heretothereideas.blogspot.com/</pre></a><pre><br></pre><pre><br></pre><pre><br></pre></blockquote><pre><br></pre></blockquote><pre>-- </pre><pre><br></pre><pre>James P. Kinney III</pre><pre><br></pre><pre>Every time you stop a school, you will have to build a jail. What you</pre><pre>gain at one end you lose at the other. It's like feeding a dog on his</pre><pre>own tail. It won't fatten the dog.</pre><pre>- Speech 11/23/1900 Mark Twain</pre><pre><br></pre><a href="http://heretothereideas.blogspot.com/"><pre>http://heretothereideas.blogspot.com/</pre></a><pre><br></pre><pre><br></pre></blockquote><pre><br></pre></blockquote><div><span><pre><pre>-- <br></pre>James P. Kinney III
Every time you stop a school, you will have to build a jail. What you
gain at one end you lose at the other. It's like feeding a dog on his
own tail. It won't fatten the dog.
- Speech 11/23/1900 Mark Twain
http://heretothereideas.blogspot.com/
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