[ale] SuSE disk volumes?
Jim Kinney
jim.kinney at gmail.com
Wed Jan 9 19:17:59 EST 2019
Ah. BtrFS is like LVM thinpool allocation. Allows overcommit on
creation to be backfilled later with physical drive space when needed.
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.
On Wed, 2019-01-09 at 17:55 -0600, Beddingfield, Allen via Ale wrote:
> The "subvolumes" section on this page explains it much better than I
> can.
> https://btrfs.wiki.kernel.org/index.php/SysadminGuide
>
> Allen B.
> On 1/9/19 1:22 PM, Jim Kinney wrote:
> > So a subvolume is sortof partition-like but doesn't actually have a
> > partition boundary.
> > On Wed, 2019-01-09 at 13:15 -0600, Beddingfield, Allen wrote:
> > > Yeah, that output is horrible. Essentially you logically
> > > definewhatever you want to be a "volume" for snapshot
> > > purposes. df isn'tsmart enough to tell the difference, so it
> > > gives you that mess. It isreally one big "/", with subvolumes
> > > defined.Allen B.
> > > On 1/9/19 1:13 PM, Jim Kinney wrote:
> > > > Learned something new. Never used BtrFS. That output is
> > > > ratheroffputting! What does lsblk show?
> > > > On Wed, 2019-01-09 at 13:05 -0600, Beddingfield, Allen via Ale
> > > > wrote:
> > > > > Not actually a problem - just BtrFS subvolumes. Look in
> > > > > thepartitioning tool in yast to see the BtrFS
> > > > > configuration. You may alsowant to neuter the snapshot
> > > > > policy, or it will eventually fill up "/"
> > > > > On 1/9/19 1:03 PM, Jim Kinney via Ale wrote:
> > > > > > fun. NOT!
> > > > > > Check for disk errors and copy off anything you care about.
> > > > > > Hmm. That .snapshots folder makes me think that that
> > > > > > partition iscomposed (improperly) of files from a previous
> > > > > > VM snapshot set that wasnot collapsed before export.
> > > > > > On Wed, 2019-01-09 at 13:39 -0500, Leam Hall via Ale wrote:
> > > > > > > Am I the only one that thinks this is weird output for
> > > > > > > "df -h"?
> > > > > > > ###
> > > > > > > /dev/sda2 14G 2.0G 11G 16% //dev/sda2
> > > > > > > 14G 2.0G 11G 16% /opt/dev/sda2 14G 2.0G
> > > > > > > 11G 16% /var/tmp/dev/sda2 14G 2.0G 11G 16%
> > > > > > > /tmp/dev/sda2 14G 2.0G 11G 16%
> > > > > > > /.snapshots/dev/sda2 14G 2.0G 11G 16%
> > > > > > > /var/lib/mariadb/dev/sda2 14G 2.0G 11G 16%
> > > > > > > /var/lib/libvirt/images/dev/sda2 14G 2.0G 11G
> > > > > > > 16% /var/lib/pgsql/dev/sda2 14G 2.0G 11G 16%
> > > > > > > /usr/local/dev/sda2 14G 2.0G 11G 16%
> > > > > > > /var/spool/dev/sda2 14G 2.0G 11G 16%
> > > > > > > /var/cache/dev/sda2 14G 2.0G 11G 16%
> > > > > > > /boot/grub2/i386-pc/dev/sda2 14G 2.0G 11G 16%
> > > > > > > /var/crash/dev/sda2 14G 2.0G 11G 16%
> > > > > > > /srv/dev/sda2 14G 2.0G 11G 16%
> > > > > > > /var/opt/dev/sda2 14G 2.0G 11G 16%
> > > > > > > /var/lib/mysql/dev/sda2 14G 2.0G 11G 16%
> > > > > > > /var/lib/named/dev/sda2 14G 2.0G 11G 16%
> > > > > > > /var/lib/mailman/dev/sda2 14G 2.0G 11G 16%
> > > > > > > /boot/grub2/x86_64-efi/dev/sda2 14G 2.0G 11G
> > > > > > > 16% /home/dev/sda2 14G 2.0G 11G 16%
> > > > > > > /var/log/dev/sda2 14G 2.0G 11G 16%
> > > > > > > /var/lib/machines
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> > > > > > --
> > > > > > James P. Kinney III
> > > > > > Every time you stop a school, you will have to build a
> > > > > > jail. What yougain at one end you lose at the other. It's
> > > > > > like feeding a dog on hisown tail. It won't fatten the
> > > > > > dog.- Speech 11/23/1900 Mark Twain
> > > > > > http://heretothereideas.blogspot.com/
> > > > > >
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> > > > --
> > > > James P. Kinney III
> > > > Every time you stop a school, you will have to build a jail.
> > > > What yougain at one end you lose at the other. It's like
> > > > feeding a dog on hisown tail. It won't fatten the dog.- Speech
> > > > 11/23/1900 Mark Twain
> > > > http://heretothereideas.blogspot.com/
> > > >
> > > >
> > --
> > James P. Kinney III
> > Every time you stop a school, you will have to build a jail. What
> > yougain at one end you lose at the other. It's like feeding a dog
> > on hisown tail. It won't fatten the dog.- Speech 11/23/1900 Mark
> > Twain
> > http://heretothereideas.blogspot.com/
> >
--
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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